Quantum computers and Bitcoin mining – Explained – TechNative

What are the implications of quantum computing for Bitcoin mining?

I want to preface this by saying I am by no means an expert in either quantum computing or cryptography, but I understand that quantum computers theoretically would have a lot of advantages in terms of decrypting modern cryptographic systems. What are the implications of this for the difficulty of mining bitcoin?
I have a lot of hope for Bitcoin as an alternative to current fiat currencies, so I'm very curious what effect the advent of true quantum computers will have on it's functionality.
submitted by Coolshitblog to Bitcoin [link] [comments]

What are the implications of quantum computing for Bitcoin mining? : cross post from r/Bitcoin

submitted by ferretinjapan to BitcoinHelp [link] [comments]

AI vs Quantum computing for mining (x-post from /r/Bitcoin)

submitted by ASICmachine to CryptoCurrencyClassic [link] [comments]

Can a quantum computer be used for bitcoin mining?

This has been bothering me for a while.
I'm a newbie in computer science, and I just found out about Grover’s algorithm, which can only be implemented on a quantum computer. Supposedly it can achieve a quadratic speedup over a classical computer, brute-forcing a solution to a n-bit symmetric encryption key in 2^n/2 iterations.
This led me to think that, by utilizing a quantum computer or quantum simulator of about 40-qubits that runs Grover's algorithm, is it possible to mine bitcoins this way? The current difficulty of bitcoin mining is about 15,466,098,935,554 (approximately 2^44), which means that it would take about 2^44*2^32=2^76 SHA256 hashes before a valid block header hash is found.
However, by implementing Grover's algorithm, we would only need to sort through 2^76/2=2^38 hashes to discover a valid block header hash. A 38-qubit quantum computer should be sufficient in this case - which means the 40-qubit quantum computer should be more than enough to handle bitcoin mining.
Therefore - is it possible to use quantum computers to mine bitcoins this way? I'm not too familiar with quantum computers, so please correct me if I missed something.......
NOTE: I am NOT asking whether it is possible to use quantum computers to break the ECDSA secp256k1 algorithm, which would effectively allow anyone to steal bitcoins from wallets. I know that this would require much more than 40 qubits, and is definitely not happening in the near-future.
Rather, I'm asking about bitcoin mining, which is a much easier problem than trying to break ECDSA secp256k1.
submitted by Palpatine88888 to QuantumComputing [link] [comments]

[Discussion: QComputing] Can a quantum computer be used for bitcoin mining?

submitted by iciq to QuantumInformation [link] [comments]

Meet The Memcomputer: The Brain-Like Alternative to Quantum Computing - Can this be used for Bitcoin Mining?

Meet The Memcomputer: The Brain-Like Alternative to Quantum Computing - Can this be used for Bitcoin Mining? submitted by Satoshi- to Bitcoin [link] [comments]

11-21 16:13 - '"It took 200 secs for Quantum computers to do a calculation of what it would have taken current supercomputers 10,000 years to accomplish." Does this mean that Quantum computers can speed up Bitcoin mining?' (youtube.com) by /u/axle_gallardo removed from /r/Bitcoin within 19-29min

"It took 200 secs for Quantum computers to do a calculation of what it would have taken current supercomputers 10,000 years to accomplish." Does this mean that Quantum computers can speed up Bitcoin mining?
Go1dfish undelete link
unreddit undelete link
Author: axle_gallardo
submitted by removalbot to removalbot [link] [comments]

“Your magnitude estimates weren’t off, you were just lying. The chance of you being able to build a quantum computer to mine Bitcoin was always 0%. You knew this and took money for it anyway. Scammer.”

“Your magnitude estimates weren’t off, you were just lying. The chance of you being able to build a quantum computer to mine Bitcoin was always 0%. You knew this and took money for it anyway. Scammer.” submitted by newtobch to btc [link] [comments]

Your magnitude estimates werent off, you were just lying. The chance of you being able to build a quantum computer to mine Bitcoin was always 0%. You knew this and took money for it anyway. Scammer.

Your magnitude estimates werent off, you were just lying. The chance of you being able to build a quantum computer to mine Bitcoin was always 0%. You knew this and took money for it anyway. Scammer. submitted by ABitcoinAllBot to BitcoinAll [link] [comments]

If a quantum computer was used for Bitcoin mining, you still wouldn't make a profit.

submitted by SirBreadSticks to Showerthoughts [link] [comments]

Prediction: A bitcoin miner will invent the first usefull quantum computer for mining

submitted by mughat to Bitcoin [link] [comments]

Quantum-Proof Encryption?

Safing team -
What are your thoughts on so-called quantum-proof encryption?
  1. Is it possible?
  2. Are you planning on making it at some point?
  3. This would put you on the map.
Google has let slip recently that they have a quantum computer. Many people believe it's "not there yet", and won't be for a long time.
Here's a different perspective.
Most people don't understand what quantum computers are. They probably just think it's next-gen or something harmless like that, because they simply don't have a category for it.
However, for those who do understand what it is - in my case, I think I kind of understand it - find its implications completely terrifying and overwhelming.
Emotions are a funny thing. If I were to take the average Joe on the street and explain to them about how data tracking works, they'd be absolutely horrified.
For example, I could sit someone down and explain to them about how Google is invisibly present on nearly every website they visit. I could demonstrate this using uMatrix in real time. "Look! Here they are. (Click to the next website.) Here they are. (Click to the next website.) Here they are again. (Click.) Again."
And when they first realize this, they are horrified. I've seen it over and over again, because I tell anyone who will listen. They are so horrified, in fact, that their defense mechanisms kick in. The most common defense mechanism is to simply shut it off and forget it. They'll say, "Oh well, what can I do about it? Who cares what I buy on Amazon? I have nothing to hide. I'm boring. I don't do drugs, I'm not having an affair, I don't break the law."
But some have a different defense mechanism. They seek to understand it, in order to protect themselves. Here's a threat, so I have to "know thy enemy". These are the privacy geeks, who dive into this head first. You can see them on the privacy subs. They're trying to wrap their heads around it.
But eventually, something happens to them too. Eventually, they realize that the problem is far worse than even their fears imagined. They become paranoid and take extreme measures. Some go very far down this road.
Eventually, the paranoia leaves them exhausted and they reach their limit. They're spending half their waking moments studying it, following it, trying to understand it, trying to set their devices up with the latest and greatest thing that they think will protect them.
The more stable among them eventually realize that their paranoia is toxic, and they realize that they have to strike a balance. They know they have to begin to pick their battles and make some compromises. They realize their "enemy" is too powerful for them.
There is one thing, however, that people have come to trust. Encryption. If their traffic is encrypted, they "know" it's "safe". VPNs. The Tor browser and its layers of encryption.
But quantum computers could change that. I understand quantum computers like this...
Imagine a child at a sit-down restaurant with a kids' menu. On the back of that kids' menu is a maze. They try out one path, it reaches a dead end. So they go back and try a different path, but that too is a dead end. They keep trying paths until they finally get to the end of the maze.
Computers perform calculations that work similarly to the maze. They try one solution, then another, then another, then another, until finally, they get the solution. The attempts are linear: one solution attempt after another. Think of movies where they depict a computer trying to break a password. They show all the characters in the password, and they're flashing through all possible characters. Then suddenly, one of the characters stops flashing. That character is a T. The next one suddenly stops, and that's a 4. On and on it goes, until all the characters are locked in place.
This is how Bitcoin mining works, for example. It takes a LOT of processing power to complete a calculation that produces one Bitcoin. This helps control the supply of Bitcoins. (I wonder who's collecting these solutions?)
But a quantum computer doesn't work like that. It's not linear. A quantum computer can attempt every possible solution at once. In the maze, it can attempt every possible path at once. It can crack even a very long, very complex password instantly. It can mine a Bitcoin in a moment. Snap your fingers. Bitcoin. Snap your fingers again. Another Bitcoin. One computer. Nearly instantaneously.
A quantum computer could be powerful enough to break encryption in real time, no matter how complex. This capability is so powerful it blows the mind. And then there's DNA-based processors, which can multiply, which also allows them to try every solution at once. It just multiplies as many times as necessary. If quantum computers are finite, DNA computers could theoretically be infinite. I think. (But I won't pretend to totally grasp what we're talking about here.)
A quantum-based or DNA-based laptop could theoretically be more powerful than all the processors in the entire world on every computer, including super computers and all the servers, combined.
I have brought this up in privacy forums. The standard, defense-mechanism-based answer is, "But that's YEARS away! The capability just isn't there yet! Look at what the publicly-available information says about it!"
But we're talking about Google. They have secrets, don't they? They're invisibly present on almost every website we visit. Their power stems from the fact that most people have no idea that that's true. How it all works is proprietary. There's a lot of guessing going on. No one knows for sure.
But if Google has ANY secrets at all, wouldn't they keep the capabilities of their quantum computer secret? Isn't it kind of surprising that the public knows (and has already forgotten) that Google has a functioning quantum computer? So does IBM. What capabilities do these possess, which the public knows nothing about? I assume the capability is greater than the public knows.
Right now, Google is "cooperating" with China on AI. It is publicly known that China has made tremendous advances in quantum computing. Connect the dots.
A quantum computer, fully functioning, could break encryption in real time. With the resources Google has, especially when combined with the resources of the Chinese government, imagine what they could do. Google already has all the data. They could decrypt it ALL. And they could share it with the Chinese government, who I'm sure would be willing to pay any price for it.
If Google is willing to cooperate on AI with China, where's their red-line as a company? What line will they say, "Oh no, we wouldn't do that. It would be unethical." China has actual concentration camps. Just like the Nazis once did. They put Muslims there. They force people to have abortions, repress religions, and even force some people to donate their organs. At least, there seems to be solid evidence that these things are occurring. This is a country ruled by sociopaths who seek to take over the world.
Why would anyone ever trust Google to "don't be evil", when clearly they have no ethical scruples whatsoever? Google, as a company, is a sociopath. Completely heartless. They are willing to exploit people in secret and cooperate with the Chinese communist party and their military. Why? To make money. If that's true, what else would they be willing to do?
I don't know if there is or even could be any such thing as quantum-proof encryption. I'm extremely skeptical, personally. But if it does exist, or could exist, then we need it. And we need it like 10 years ago.
So - does it exist? Could it exist? Could SPN employ it?
submitted by On3KI9oC9I7ERmJI to safing [link] [comments]

I'm trying to be positive but GL's actions are the opposite of intelligence. This is the worst update in A9 history. I'll explain why...

I'm trying to be positive but GL's actions are the opposite of intelligence. This is the worst update in A9 history. I'll explain why...
It's a pretty long rant. You have been warned...
  • Worsened graphics. Same device, much worse graphics for no reason. They literally made the game engine worse.
  • Frame skipping and lagging everywhere. Also game crashes. They said they optimized the game. I bet they forgot to mention that you need a quantum computer to play their casino racing masterpiece.
  • The older bug with the mini map (tap do steer players can't tap in that area) is back.
  • The infamous lagging screen after every freaking race (what the hell are they doing in background that the phones become so hot? bitcoin mining?). They still didn't fix it after the recent hotfix! Who pays these clowns who can't even revert some dumb changes?
  • The unfair SE. There are hardly tokens offered. They keep reducing the rewards until there will be nothing left except uncommon parts and a few credits. They expect us to play hundreds of races for peanuts. The finest greediness. Also how come SE still shares the same tickets pool with daily events? They are different things!
  • Same old stinky GP. Everyone knows what is wrong with this thing that has nothing in common with real grand prixes except the name. Most regular players don't win keys. Why should we even bother anymore?
  • The hard Unleashed event. They put the same required time 0:51 despite the cars having different rankings. They don't have the expression "fair play" in their dictionary.
  • Credits heist is good in theory. In practice they added the awful police besides the aggressive AI to make sure you can't get those credits. They also added stars requirements for good measure. Also they made it that way you need to play too many races if you want all rewards. Efficiency is again not in their dictionary.
  • The new MP format which encourages dumb grinding to get some decent milestones.
  • The club rewards remain a joke.
  • You need to complete 250 conditions in SE just to have the chance to buy packs! Whatever GL idiot who thought of that should have his head smashed on his monitor.
  • They still didn't fix that stupid error with no internet connection! My internet is working, it's not my fault you can't code a decent internet connection algorithm.
  • The cheaters are still dominating MP. The Android version has such a poor security that every schmuck can abuse the game. I wonder if anyone even reads those in game reports or are there as placebo effect.
  • Did you check how much internet traffic this game consumes? What the fxx-k they transfer that A9 needs gigabytes of data every month just to play it?
  • Should I mention the bunch of useless employees called Customer Care? An appendix is more useful than them.
  • etc
But we have emoticons! And new cars while most of us didn't even max out or unlock many of the previous premium cars. Give me a reason why should I keep playing...

I hope your wallet is as big as their greediness..
submitted by SpaceGenesis to Asphalt9 [link] [comments]

Technical: Taproot: Why Activate?

This is a follow-up on https://old.reddit.com/Bitcoin/comments/hqzp14/technical_the_path_to_taproot_activation/
Taproot! Everybody wants it!! But... you might ask yourself: sure, everybody else wants it, but why would I, sovereign Bitcoin HODLer, want it? Surely I can be better than everybody else because I swapped XXX fiat for Bitcoin unlike all those nocoiners?
And it is important for you to know the reasons why you, o sovereign Bitcoiner, would want Taproot activated. After all, your nodes (or the nodes your wallets use, which if you are SPV, you hopefully can pester to your wallet vendoimplementor about) need to be upgraded in order for Taproot activation to actually succeed instead of becoming a hot sticky mess.
First, let's consider some principles of Bitcoin.
I'm sure most of us here would agree that the above are very important principles of Bitcoin and that these are principles we would not be willing to remove. If anything, we would want those principles strengthened (especially the last one, financial privacy, which current Bitcoin is only sporadically strong with: you can get privacy, it just requires effort to do so).
So, how does Taproot affect those principles?

Taproot and Your /Coins

Most HODLers probably HODL their coins in singlesig addresses. Sadly, switching to Taproot would do very little for you (it gives a mild discount at spend time, at the cost of a mild increase in fee at receive time (paid by whoever sends to you, so if it's a self-send from a P2PKH or bech32 address, you pay for this); mostly a wash).
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash, so the Taproot output spends 12 bytes more; spending from a P2WPKH requires revealing a 32-byte public key later, which is not needed with Taproot, and Taproot signatures are about 9 bytes smaller than P2WPKH signatures, but the 32 bytes plus 9 bytes is divided by 4 because of the witness discount, so it saves about 11 bytes; mostly a wash, it increases blockweight by about 1 virtual byte, 4 weight for each Taproot-output-input, compared to P2WPKH-output-input).
However, as your HODLings grow in value, you might start wondering if multisignature k-of-n setups might be better for the security of your savings. And it is in multisignature that Taproot starts to give benefits!
Taproot switches to using Schnorr signing scheme. Schnorr makes key aggregation -- constructing a single public key from multiple public keys -- almost as trivial as adding numbers together. "Almost" because it involves some fairly advanced math instead of simple boring number adding, but hey when was the last time you added up your grocery list prices by hand huh?
With current P2SH and P2WSH multisignature schemes, if you have a 2-of-3 setup, then to spend, you need to provide two different signatures from two different public keys. With Taproot, you can create, using special moon math, a single public key that represents your 2-of-3 setup. Then you just put two of your devices together, have them communicate to each other (this can be done airgapped, in theory, by sending QR codes: the software to do this is not even being built yet, but that's because Taproot hasn't activated yet!), and they will make a single signature to authorize any spend from your 2-of-3 address. That's 73 witness bytes -- 18.25 virtual bytes -- of signatures you save!
And if you decide that your current setup with 1-of-1 P2PKH / P2WPKH addresses is just fine as-is: well, that's the whole point of a softfork: backwards-compatibility; you can receive from Taproot users just fine, and once your wallet is updated for Taproot-sending support, you can send to Taproot users just fine as well!
(P2WPKH and P2WSH -- SegWit v0 -- addresses start with bc1q; Taproot -- SegWit v1 --- addresses start with bc1p, in case you wanted to know the difference; in bech32 q is 0, p is 1)
Now how about HODLers who keep all, or some, of their coins on custodial services? Well, any custodial service worth its salt would be doing at least 2-of-3, or probably something even bigger, like 11-of-15. So your custodial service, if it switched to using Taproot internally, could save a lot more (imagine an 11-of-15 getting reduced from 11 signatures to just 1!), which --- we can only hope! --- should translate to lower fees and better customer service from your custodial service!
So I think we can say, very accurately, that the Bitcoin principle --- that YOU are in control of your money --- can only be helped by Taproot (if you are doing multisignature), and, because P2PKH and P2WPKH remain validly-usable addresses in a Taproot future, will not be harmed by Taproot. Its benefit to this principle might be small (it mostly only benefits multisignature users) but since it has no drawbacks with this (i.e. singlesig users can continue to use P2WPKH and P2PKH still) this is still a nice, tidy win!
(even singlesig users get a minor benefit, in that multisig users will now reduce their blockchain space footprint, so that fees can be kept low for everybody; so for example even if you have your single set of private keys engraved on titanium plates sealed in an airtight box stored in a safe buried in a desert protected by angry nomads riding giant sandworms because you're the frickin' Kwisatz Haderach, you still gain some benefit from Taproot)
And here's the important part: if P2PKH/P2WPKH is working perfectly fine with you and you decide to never use Taproot yourself, Taproot will not affect you detrimentally. First do no harm!

Taproot and Your Contracts

No one is an island, no one lives alone. Give and you shall receive. You know: by trading with other people, you can gain expertise in some obscure little necessity of the world (and greatly increase your productivity in that little field), and then trade the products of your expertise for necessities other people have created, all of you thereby gaining gains from trade.
So, contracts, which are basically enforceable agreements that facilitate trading with people who you do not personally know and therefore might not trust.
Let's start with a simple example. You want to buy some gewgaws from somebody. But you don't know them personally. The seller wants the money, you want their gewgaws, but because of the lack of trust (you don't know them!! what if they're scammers??) neither of you can benefit from gains from trade.
However, suppose both of you know of some entity that both of you trust. That entity can act as a trusted escrow. The entity provides you security: this enables the trade, allowing both of you to get gains from trade.
In Bitcoin-land, this can be implemented as a 2-of-3 multisignature. The three signatories in the multisgnature would be you, the gewgaw seller, and the escrow. You put the payment for the gewgaws into this 2-of-3 multisignature address.
Now, suppose it turns out neither of you are scammers (whaaaat!). You receive the gewgaws just fine and you're willing to pay up for them. Then you and the gewgaw seller just sign a transaction --- you and the gewgaw seller are 2, sufficient to trigger the 2-of-3 --- that spends from the 2-of-3 address to a singlesig the gewgaw seller wants (or whatever address the gewgaw seller wants).
But suppose some problem arises. The seller gave you gawgews instead of gewgaws. Or you decided to keep the gewgaws but not sign the transaction to release the funds to the seller. In either case, the escrow is notified, and if it can sign with you to refund the funds back to you (if the seller was a scammer) or it can sign with the seller to forward the funds to the seller (if you were a scammer).
Taproot helps with this: like mentioned above, it allows multisignature setups to produce only one signature, reducing blockchain space usage, and thus making contracts --- which require multiple people, by definition, you don't make contracts with yourself --- is made cheaper (which we hope enables more of these setups to happen for more gains from trade for everyone, also, moon and lambos).
(technology-wise, it's easier to make an n-of-n than a k-of-n, making a k-of-n would require a complex setup involving a long ritual with many communication rounds between the n participants, but an n-of-n can be done trivially with some moon math. You can, however, make what is effectively a 2-of-3 by using a three-branch SCRIPT: either 2-of-2 of you and seller, OR 2-of-2 of you and escrow, OR 2-of-2 of escrow and seller. Fortunately, Taproot adds a facility to embed a SCRIPT inside a public key, so you can have a 2-of-2 Taprooted address (between you and seller) with a SCRIPT branch that can instead be spent with 2-of-2 (you + escrow) OR 2-of-2 (seller + escrow), which implements the three-branched SCRIPT above. If neither of you are scammers (hopefully the common case) then you both sign using your keys and never have to contact the escrow, since you are just using the escrow public key without coordinating with them (because n-of-n is trivial but k-of-n requires setup with communication rounds), so in the "best case" where both of you are honest traders, you also get a privacy boost, in that the escrow never learns you have been trading on gewgaws, I mean ewww, gawgews are much better than gewgaws and therefore I now judge you for being a gewgaw enthusiast, you filthy gewgawer).

Taproot and Your Contracts, Part 2: Cryptographic Boogaloo

Now suppose you want to buy some data instead of things. For example, maybe you have some closed-source software in trial mode installed, and want to pay the developer for the full version. You want to pay for an activation code.
This can be done, today, by using an HTLC. The developer tells you the hash of the activation code. You pay to an HTLC, paying out to the developer if it reveals the preimage (the activation code), or refunding the money back to you after a pre-agreed timeout. If the developer claims the funds, it has to reveal the preimage, which is the activation code, and you can now activate your software. If the developer does not claim the funds by the timeout, you get refunded.
And you can do that, with HTLCs, today.
Of course, HTLCs do have problems:
Fortunately, with Schnorr (which is enabled by Taproot), we can now use the Scriptless Script constuction by Andrew Poelstra. This Scriptless Script allows a new construction, the PTLC or Pointlocked Timelocked Contract. Instead of hashes and preimages, just replace "hash" with "point" and "preimage" with "scalar".
Or as you might know them: "point" is really "public key" and "scalar" is really a "private key". What a PTLC does is that, given a particular public key, the pointlocked branch can be spent only if the spender reveals the private key of the given public key to you.
Another nice thing with PTLCs is that they are deniable. What appears onchain is just a single 2-of-2 signature between you and the developemanufacturer. It's like a magic trick. This signature has no special watermarks, it's a perfectly normal signature (the pledge). However, from this signature, plus some datta given to you by the developemanufacturer (known as the adaptor signature) you can derive the private key of a particular public key you both agree on (the turn). Anyone scraping the blockchain will just see signatures that look just like every other signature, and as long as nobody manages to hack you and get a copy of the adaptor signature or the private key, they cannot get the private key behind the public key (point) that the pointlocked branch needs (the prestige).
(Just to be clear, the public key you are getting the private key from, is distinct from the public key that the developemanufacturer will use for its funds. The activation key is different from the developer's onchain Bitcoin key, and it is the activation key whose private key you will be learning, not the developer's/manufacturer's onchain Bitcoin key).
So:
Taproot lets PTLCs exist onchain because they enable Schnorr, which is a requirement of PTLCs / Scriptless Script.
(technology-wise, take note that Scriptless Script works only for the "pointlocked" branch of the contract; you need normal Script, or a pre-signed nLockTimed transaction, for the "timelocked" branch. Since Taproot can embed a script, you can have the Taproot pubkey be a 2-of-2 to implement the Scriptless Script "pointlocked" branch, then have a hidden script that lets you recover the funds with an OP_CHECKLOCKTIMEVERIFY after the timeout if the seller does not claim the funds.)

Quantum Quibbles!

Now if you were really paying attention, you might have noticed this parenthetical:
(technical details: a Taproot output is 1 version byte + 32 byte public key, while a P2WPKH (bech32 singlesig) output is 1 version byte + 20 byte public key hash...)
So wait, Taproot uses raw 32-byte public keys, and not public key hashes? Isn't that more quantum-vulnerable??
Well, in theory yes. In practice, they probably are not.
It's not that hashes can be broken by quantum computes --- they're still not. Instead, you have to look at how you spend from a P2WPKH/P2PKH pay-to-public-key-hash.
When you spend from a P2PKH / P2WPKH, you have to reveal the public key. Then Bitcoin hashes it and checks if this matches with the public-key-hash, and only then actually validates the signature for that public key.
So an unconfirmed transaction, floating in the mempools of nodes globally, will show, in plain sight for everyone to see, your public key.
(public keys should be public, that's why they're called public keys, LOL)
And if quantum computers are fast enough to be of concern, then they are probably fast enough that, in the several minutes to several hours from broadcast to confirmation, they have already cracked the public key that is openly broadcast with your transaction. The owner of the quantum computer can now replace your unconfirmed transaction with one that pays the funds to itself. Even if you did not opt-in RBF, miners are still incentivized to support RBF on RBF-disabled transactions.
So the extra hash is not as significant a protection against quantum computers as you might think. Instead, the extra hash-and-compare needed is just extra validation effort.
Further, if you have ever, in the past, spent from the address, then there exists already a transaction indelibly stored on the blockchain, openly displaying the public key from which quantum computers can derive the private key. So those are still vulnerable to quantum computers.
For the most part, the cryptographers behind Taproot (and Bitcoin Core) are of the opinion that quantum computers capable of cracking Bitcoin pubkeys are unlikely to appear within a decade or two.
So:
For now, the homomorphic and linear properties of elliptic curve cryptography provide a lot of benefits --- particularly the linearity property is what enables Scriptless Script and simple multisignature (i.e. multisignatures that are just 1 signature onchain). So it might be a good idea to take advantage of them now while we are still fairly safe against quantum computers. It seems likely that quantum-safe signature schemes are nonlinear (thus losing these advantages).

Summary

I Wanna Be The Taprooter!

So, do you want to help activate Taproot? Here's what you, mister sovereign Bitcoin HODLer, can do!

But I Hate Taproot!!

That's fine!

Discussions About Taproot Activation

submitted by almkglor to Bitcoin [link] [comments]

Some very important points that most people do not understand about Bitcoin

Point 1)
Most people do not understand that you can't send money over internet, but only information. Bitcoin is the first digital settlement layer.
When I send a picture to someone on Facebook messenger, I don't actually send a picture. I send information about the pictures structure, and the picture gets restructured on the client side (the cellphone) of the user I send it to. Copy of the information is being sent, not the picture itself. So you can't send money over internet, it is not possible, only information.
If I have a bank account at some bank, and I send $50 dollars to another person in the same bank by using the banks website, then a transaction happens between two people within the same infrastructure, which is the banks back-end system and database. So the banks system just subtracts $50 dollars from one person and adds $50 dollars to another person. But no money has moved, only information has been edited. But if I send money to someone that uses another Bank, then this bank has its own infrastructure which is independent of the first. So Bank1 tells Bank2 that they have a user that wants to send money to a user of the other bank. So Bank1 subtracts $50 from User1, and Bank2 adds $50 to User2, but now Bank1 owes Bank2 $50, why? Because you can't send money over internet. So they have to settle the difference between them with some kind of a settlement system, (cash, gold or a third party like a central bank). This difference can be the result of many transactions between many users and can be millions of dollars of worth, the settlement can be done periodically for example every 6 months.
With Bitcoin, because of how the system works, it is almost as if you can send value over internet for the first time, even though you don't really send value, you still send information, but since the infrastructure is global, it is like the first example, it is as if the world has (one large bank infrastructure), that is fully automated and which no one controls.
This alone makes Bitcoin extremely valuable, because it is a trust less digital settlement layer which is extremely secure and not dependent on one particular nation or organisation.
Point 2)
There can never be more than 21 million Bitcoin. This is very hard for people to grasp. Because what do you mean there can never be more than 21 million bitcoin? It sounds like a game, such a scam... People do not understand that Bitcoin is not normal software. In normal software the developers can change the code as they want and publish the code when they want. They do not understand that Bitcoin is a software that is not like a normal software. You can't actually change the number even if the number is programmed in. Which of-course most people will deny, because it makes no sense for most people. They do not understand that even though it is theoretically possible to change it, it is practically almost impossible. It is theoretically possible for me to convince half of Sweden to burn half of their money, but practically impossible. Just because something is theoretically possible, doesn't mean that it will happen within a time frame, or even in your lifetime. In order for the 21 million supply to change, most people in the Bitcoin community needs to agree on it, which is practically impossible. Miners have to change to the new protocol and so on. Not going to happen.
When gold treasures were lost in the past, someone else could find them. Gold practically never completely disappears, it is a chemical element. With Bitcoin, once it is lost it is practically lost forever (put aside quantum computing for now and other theoretical unforeseeable events). 21 million is only the upper theoretical limit. Bitcoin will be more and more scarce as time goes by. Gold is not like this. Gold has an inflation rate of 1,5% every year. The reason it is constant is because even if the stock gets bigger, the flow into the stock also gets bigger because of better mining capabilities, so you can look at it as constant inflation of 1.5% every year. With Bitcoin, not only do the stock to flow ratio go up every halvening, and the flow into bitcoin not only decreases with time, but almost goes into negative because of lost coins every year. This is completely insane and people do not understand this. If you combine this almost deflationary nature of Bitcoin with extreme bullish market sentiment then you will realize that no one knows what is going to happen in the future because wrapping your head around all this and to come to a conclusion about the Bitcoin price will make you sound absolutely delusional to most people.
Point 3)
People think that $100,000 bitcoin is wishful thinking and that there is not enough money in the world for Bitcoin to be worth millions of dollars. Which I can assure you is false. Bitcoin can even be worth $50 million dollars per coin, which would make 2 satoshi 1 dollar. Even if one Bitcoin transaction would cost 10 000 Satoshi. You might say, that's not possible, whats the point if one transaction is so expensive. Again, you don't need to actually do a transfer of money, as in the first example of point 1, virtual transactions on bank level can happen, or on Coinbase. You can send 100 satoshi to someone and pay 1 satoshi in fee "on the bank level", not on chain, banks or exchanges then will settle the difference as they want. At least with Bitcoin you have the option to be you own bank, even if that will cost you more, you still have the option. This is already happening in front of your eyes. Banks like Dutch ING, Deutsche bank, are already working on custody services for cryptocurrencies. And even exchanges want to operate as banks and exchanges like Coinbase are working to get license for this. This is already happening and it is the correct move forwards, a mix between the legacy banking system and cryptocurrencies. You can already spend your Bitcoin with Coinbase Visa Card or similar services. Most people are too lazy and stupid to operate like us with their own wallets, it is a fact well known.
In terms of the price, money inflow is not the same as market cap. Take for instance the following simple scenario. I own 100% of the shares of my own company and I decide to sell 10% of the company for 1 million USD, which will value my whole company at 10 million USD, so 1 million flow into my company leads to 10x market cap of 10 million USD. For Bitcoin to have 21 trillion market cap, Bitcoin does not need 21 trillion of money inflow. Bitcoin price is dependent on market sentiment, if the market sentiment is such that very few people want to sell their coins because the price keeps going up then you might have 100x market cap of the money inflow. So 1 billion USD in money inflow translates to 100 billion USD in market cap. The multiplier can be 10x, 2x or 50x, all depends on market sentiment and time period. So an inflow of 10 trillion USD in 10 years might lead to 100 trillion USD market cap of BTC and 5 million USD per Bitcoin.
Bitcoin value have no roof, the price might actually just keep going up and up and up and up and up. We have never had something that is absolutely scarce, and global, and seen as an alternative form of money, when the rest of the world keeps bubbling up. There is no limit on the BTC price because the whole world works with a bubbly system, and the way Bitcoin is price discovered, is a guaranteed insane BTC price in the future. Even $100 million USD per Bitcoin in 50 years before I am dead is possible.
Point 4)
Fiat does not need to die, and Bitcoin does not need to take over in order for Bitcoin to have "ridiculous price". No financial crisis is needed. Actually what you want is things to just continue as they have done in the last 10 years. No too extreme events. Just "small events" here and there. You can't change human nature, it is inevitable. Bitcoin is so ingrained into our world that there is no way back. There will be people with whole Bitcoin, and people without. Just like people with gold and stock investments and real estate, and people without those things. No insane events, this is all normal.
Point 5)
Bitcoin has won as the financial cryptocurrency. No flippening will happen. The only flippening will be with gold and fiat currencies. If I wanted to, I could have developed a system like PayPal in 1 month time, and it would be able to do 5000 transactions per second because I would use MySQL and SSD, but no one would use my service because they would not trust me because they have no idea who I am and what my service is, and there is no one to send money too, so the network is not there. Bitcoin has won because security and network effect is way more important than transactions per second. Transactions per second will be dealt with on bank level, exchange level, or layer 2 solutions. This is already clear to me. Bitcoin has won.
Point 6)
In order to understand Bitcoin and what will happen in the future, you have to be able to see things that are not in front of you. You can't compare Bitcoin to Tulip mania, or even Gold. Because something like Bitcoin has never existed before and you have to think about it's properties and try to understand it with human nature and with how the world works and how everything keeps increasing, and Bitcoin is the thing that does not increase in supply. You will eventually accept the unnatural thought of Bitcoin never stopping going up in value, which is something that is hard to come to terms with, because it feels unnatural, "and it could not possibly be so".
Point 7)
The Gini coefficient of Bitcoin is not a big deal. I used to think that it was unfair that some people had 1,000 BTC, 10,000 BTC, or even 50,000 BTC. And I was afraid that they might dump their coins into the market and crash it. I have now realised that these people are smart people and they think like me, and they won't just dump their whole BTC holding on the market as that might be a very bad move for them. It is like when a majority holder of a company, like Jeff Bezos and Amazon, understands that he can't sell all of his shares in one go as that would effect Amazon stock value too much and would not be smart. It is best to sell when the price goes up, but then when they sell the BTC will just be eaten up by other people, and they will be at a loss in the longer term. And the other thing is that perhaps there is no other smart place to put that fiat money, Bitcoin might just be the best place to keep those amounts of money. Someone with a very large holding has two options. He can either sell his BTC, in which case the price would go down but the Bitcoin would be spread out between potentially thousands of new users, or he might decide to never sell. If he decides to never sell, it is as if those Bitcoins are lost forever and that is good for the Bitcoin price and Bitcoin in general. If he decides to sell then Bitcoin will be divided more equally among many users which is also a good thing for Bitcoin because that increases the network effect, and after he sells he no longer has the power to drive the price down, but now he sits on a very large fiat holding, he might even buy back at a higher price and drive the price higher. I know that if I had 10,000 BTC, I would sell 1,000 BTC and buy a house and a car and whatever I wanted, and sell another 1,000 BTC to diversify into some other assets. And keep 8,000 BTC because I don't know of anywhere else to put that kind of money into good work. I believe in Bitcoin so as an investor it makes sense to keep it here. I probably would never sell because I would never need anything else after the initial 1,000 BTC sell.
Bitcoin is like a black hole that sucks in the Earths monetary resources over time. Most people that bought really early and were smart enough to hold all the way to these prices will only sell what they need to sell and keep the rest in BTC. Some of them might want to speculate and try to time the ATH, only to buy back in with most of the fiat they sold. Which means that even if money goes out of the market, it only goes out of the market temporarily, only to get back in at hopefully lower prices. And so the market grows, and grows and grows over time.
Point 8)
Bitcoin has intrinsic value. When people like Peter Schiff say that gold has intrinsic value because gold can be used in electronics and aviation and therefore gold has value but Bitcoin has no value because it has no intrinsic value, you have to take a pause and do some critical thinking. Can you imagine 16th century pirates looking to find a gold treasure worth an insane amount because they knew gold had value because of electronics and aviation? This is clearly absurd. Gold has been used as money for thousands of years and electronics and aviation was not even a thing 150 years ago. Gold has value because it is globally scarce. Bitcoin is absolutely verifiable scarce. Bitcoin has intrinsic value because of it's monetary policy and because you can carry millions of dollars of value by remembering only 24 words in your head, and carry that value wherever you want and no one can stop you, that is intrinsic value.
People had a hard time understanding that a website like Facebook could be worth billions of dollars, because it was not physical, it was "just a website". Even a website like Google search is not physical and still it has immense value. It is valuable information and it provides a good service, and that has value, it does not have to be physical and tangible.
submitted by 21btc to Bitcoin [link] [comments]

Ceterum censeo: In some yet undefined future - the halving must be removed. The question is not: if, but when (and how)

Bitcoin's mining ecosystem is saturated. Period.
The ASIC race has weakened as it has moved closer to the technological limits - achieving some kind of fragile balance. The best proof of this is Bitmain's search for new areas (vide: AI research)
After more than a decade, we are smarter than Satoshi at least in one area - we have the knowledge acquired over these more than ten years ...
"Bitcoin should have had a 0.1% or 1% monetary inflation tax to pay for security." (Peter Todd): https://www.google.com/search?q=peter+todd+inflation
If someone cannot accept the inevitability of this right now - let him think if he would change his mind while he sees the consecutive halvings - after which the network hashrate drops half by half - and does not return to the previous level, ever... (I suppose we can see that process in 4 years already...)
And the trigger could be like this (of course after general consensus):
That would be an "organoleptic" determination of the optimal inflation rate for the Bitcoin network - and there is simply no better way to determine it. Just don't belive such simplification, when is hard to find an optimum for something - the ultimate solution is zero. It's not.
Remember, that Bitcoin is not an entity detached from the reality. There are various limitations, e.g. nanometer-based technological processes limitations, there is a finite amount of cheap energy that can be obtained on a global scale, etc.) Bitcoin functions in certain realities - whether we like it or not.
Sooner or later the situation described above will get us. It is worth to be prepared mentally for it - and not to start another war, but rather discuss it calmly. If, for example, 90% of the community considers that something is necessary for the development of bitcoin - such a change will take place.
For example, the theoretical exchange of ECDSA due to the threat of quantum computers - acceptance would take place at an express rate. It will be similar in this matter. Just it shouldn't be too late for corrective action.
The small inflation rate, decreasing continuosly and slowly but never to zero, and last but not least: determined by reality - seems to be the most proper measure in this case.
Ceterum censeo...
EDIT: If:
a) tx fees are able to keep miners mining - perfect
b) miners are pushed out by consecutive halvings - not perfect
What I proposed is unbiased way for checking that (bitcoin ecosystem overall health):
if(current_network_hashrate < network_hashrate_4_years_ago) {
do_something();
}
else do_nothing();
submitted by jk_14r to Bitcoin [link] [comments]

Unpopular opinion: Bitcoin isn´t what it claims to be

BTW I HAVE OWNED BTC IN MY LIFE ! This is not to be meant a troll. See it as an opportunity to question BTC in order to make it better eventually(?)!
The reason why I put up this post is because I see so many people on Instagram or elsewhere getting into Bitcoin as a speculative investment and thinking it is going to the moon just for some halvening.
I do not dislike the idea of cryptocurrency but actually there are a few problems with Bitcoin.

Yes, Bitcoin has paved the way for crypto, that is true.
Yes, Bitcoin is a great idea with great ideals.
Yet it is still destined to fail.

A lot of people say that BTC will be the future because of various characteristics like:

Claim #1 BTC is anonymous:
"Some effort is required to protect your privacy with Bitcoin. All Bitcoin transactions are stored publicly and permanently on the network, which means anyone can see the balance and transactions of any Bitcoin address. However, the identity of the user behind an address remains unknown until information is revealed during a purchase or in other circumstances. "
- https://bitcoin.org/en/you-need-to-know

Claim #2 BTC is decentralized:
Well, not really. BTC is tied to it´s miners. And while a lot of people here call themselves early adopters, they have never ever contributed to a solved-block. Why is this important? Who sells you your BTC? The miners... so if any big enough group of ( chinese bc they are very active) miners decides it is time to rob the people back of the BTC they sold them - there is no one going to stop them. And unfortunately this all plays along with BTC´s rules.
Everyone who didn´t get along on this one should research '51% Attack Bitcoin'\1])
The only counter I can think of is " but all the faulty transactions could be recognized and we (the hodlers) can verify the original chain on a new fork " or something like that, yeah well but technically you will still be fighting the miners and their hashrates
[1] https://duckduckgo.com/?q=51+percent+attack+bitcoin&t=ffab&atb=v140-1&ia=web

Claim #3 BTC is efficient:
If I want to send you a 100 million bucks, yeah well that can be pretty f-ing cheap in comparison to normal banks. But one of the main reasons that Bitcoins transaction fees have risen for the amounts that you actually want to use daily , is because it is more profitable for miners\1])
So as more people adopt and thus transactions getting more profitable for the miners, fees are gonna rise..
-
Also in term of energy consumption. A SINGLE transaction needs as much power as an entire US-household uses in an avg 23 days\3]) That is not sustainable, as the consumption grows with adoption. Even with 100% renewable power( which we are far away from) the shere amount of ressources (e.g silicon for solar-panels for "neutral" energy) is very debatable. Also the mining hardware has to be changed with every halvening (press f for all these rare metals in computer parts)
[1] https://coinsutra.com/bitcoin-transaction-fees/
[2] https://bitcoinfees.net/
[3] https://digiconomist.net/bitcoin-energy-consumption

#4 Thought: Quantum Computing
What will you do with Bitcoin if Google or IBM (or others) get their quantum computers to work so good, that they will easily decrypt bitcoins encryption.
Here is an interesting video if you are interested in how QComputing threatens basically anything that is encrypted:
https://www.youtube.com/watch?v=6H_9l9N3IXU

#5 Thought: Comparing BTC to USD
To anybody who says "look at the dollar dying, we will go to 100,000$ soon" - you are most likely speculating instead of believing in the intrinsic value of BTC (proof of work). If you keep measuring BTC worth in any fiat currency, you lost the point. If it really becomes THE currency, any comparison to fiat is obsolete.
I know this one is kinda unsolid but I wanted to throw it in!

#6 Thought: Financial Elite
Bitcoin rewards those who adopt first. Sounds good, right? If fiat and governments fail, most of you will be the top 1% while holding 90% of the BTC in circulation. Will that be any better than the monetary system we have right now? In the end Bitcoiin will not serve the many, who have little but it will serve the few who have much.
Think about your fellow (billions of) humans around the world. Will you explain to them: ' Well I got in first, so I am entiteled to be rich' ? I think if BTC would actually become widely adopted, that is an ethical question a lot of people have to ask themselves!
Tbh, this might be the most important point for me and I am SUPER excited for your opinions on that!

TL:DR I think there are good reasons why BTC is (unfortunately) wishful thinking and other cryptos with hopefully better systems will take lead.

I would love to hear good arguments against my positions because mostly people get triggered instead of having a conversation that could benefit everybody!

EDIT: Another source for problems with encryption:
https://arxiv.org/pdf/1804.08118.pdf " On the insecurity of quantum Bitcoin mining "
submitted by wowdisme to Bitcoin [link] [comments]

What is Blockchain Technology?

What is Blockchain Technology?
The original article appeared here: https://www.securities.io/what-is-blockchain-technology/
Its been almost ten years since Satoshi Nakamoto first introduced Blockchain technology to the world in his 2008 Bitcoin Whitepaper. Since that time, these revolutionary networks have gained popularity in both the corporate and governmental sectors. This growth is easily explained when you consider that blockchain technology provides the world with some unique advantages that were previously unimaginable. Consequently, today, you can find blockchain technology in nearly every sector of the global economy.

What is Blockchain Technology?

A blockchain is a network of computers that share a distributed ledger across all network participants (nodes). This strategy is far different than say, fiat currencies that originate from a centralized authority figure. Importantly, this ledger keeps an unbroken chain of transactions since the birth of the network. This “chain” of transactions grows larger as new “blocks” of transactions are approved and added to it.
Bitcoin Whitepaper
In order to approve new transactions, each node works together with others to validate new blocks. Additionally, the nodes also validate the current state of the entire blockchain. In order for a new block of transactions to be added to the blockchain, they must receive approval from 51% of the network’s nodes. Nodes are also referred to as miners. In this manner, blockchain networks are decentralized networks that provide unmatched security to the world of digital assets.

Security via Decentralization

Decentralization is an important aspect of blockchain technology because it makes these revolutionary ledgers immutable and unalterable. In fact, since there is no centralized attack vector, hacking a blockchain is nearly impossible. The larger the blockchain network, the more secure the data on it remains.
For example, let’s look at the world’s largest blockchain, Bitcoin. Currently, the Bitcoin blockchain has over 10,000 active nodes located across the globe. This distribution means that in order for an attacker to alter even just one tiny piece of information on the blockchain, they would need to successfully hack 5,000+ computers at once.
While this task may not be impossible for the quantum computers of the future, it’s so unprofitable that it makes no sense to even attempt such a monumental task. Additionally, on top of successfully hacking 5000+ computers at once, an attacker would also need a supercomputer to recalculate the new blockchain transactions in time to introduce them into the network. It would literally be more affordable to create a new cryptocurrency from scratch.

Consensus Mechanisms

One of the reasons why blockchain networks are so secure is the integration of consensus mechanisms. Consensus mechanisms are cryptographic protocols that leverage the participants of a blockchain network in securing its data. In the case of Bitcoin, the Proof-of-Work (PoW) consensus mechanism is used.

Proof-of-Work (PoW)

The Proof-of-Work consensus mechanism was revolutionary to the world of cryptography when it was first introduced years prior by Adam Back in his Hashcash whitepaper. In the concept, Back describes the integration of a mathematical equation to the network’s security protocols. In this way, every computer can show “proof” of their work securing the network.

Miner Rewards

It’s important to understand that nodes receive a reward for their mining efforts. These rewards adjust automatically depending on the network’s difficulty and value. In the case of Bitcoin, miners originally received 50 Bitcoin for their efforts. Today, this seems like fortune, but back in 2009, Bitcoin was only worth pennies. As the value of the token rises and the network goes, the mining rewards shrink. Today, Bitcoin miners receive 6.5 BTC if they add the next block to the chain.

SHA-256

Notably, every node validates and secures the blockchain, but only one gets to add the next block of transactions to the network. To determine who the next miner is that gets to add this block, every computer competes in a mathematical race to figure out the PoW equation. In the case of Bitcoin, the equation is known as SHA-256. Importantly, the first SHA algorithm dates back to Hashcash. This early version of the equation was known as SHA-1.
Notably, the SHA-256 equation is so difficult that it’s easier and more efficient for your computer to just make random guesses rather than attempting to figure out the equation directly. The answer to the equation must begin with a predetermined amount of 0s. In the Bitcoin blockchain, the equation’s answer must start with four zeros. However, if the network’s congestion rises, so does the difficulty of these equations. This difficulty adjusts by the addition of another zero at the beginning of the required SHA-256 answer.
Similarly to traditional commodities such as gold, there are costs that are associated with the creation and introduction of these digital assets into the market. These random guesses utilize intense computational power. This power equates to real-world costs such as electricity bills. Studies have shown that securing the Bitcoin network can use more electricity than required by entire countries. Luckily, over 80% of Bitcoin’s power consumption comes from renewable sources such as solar or hydroelectric. This cost of mining also adds measurable value to each Bitcoin.

Miners

As Bitcoin began to gain in profitability, its network’s computing power expanded significantly. In the beginning, nodes, also known as miners, could mine for Bitcoin using nothing more than your home PC. Eventually, miners realized that graphic cards were far better at the repetitive guessing required to figure out the SHA-256 algorithm. This led to a computational race in the market.

ASIC

Eventually, large blockchain firms such as Bitmain introduced Application Specific Integrated Circuit (ASIC) miners into the equation. These purpose-built miners were thousands of times more efficient at guessing the SHA-256 algorithm than the GPUs and CPUs before them. Consequently, their introduction created a scenario in which the average miner now needed to invest thousands in mining equipment to stay relevant.

Mining Pools

Luckily, some creative minds in the field began to think of ways to level the playing field out again. They developed “mining pools.” A mining pool is a network of miners that all share computational power for the common goal of mining blockchain transactions. Importantly, mining pool participants receive a percentage of the reward based on their contributions to the network’s overall hash (computational power).
Importantly, over the last three years, there has been a push to move away from power-hungry consensus mechanisms such as PoW. This desire to secure blockchains in a more efficient manner has led to the development of some truly unique consensus mechanisms in the sector.

Proof-of-Stake (PoS)

The Proof-of-Stake mechanism does away with the difficult mathematical algorithms and instead utilizes a more psychological approach to securing the network. In a PoS blockchain, users don’t need to compete mathematically to add the next block to the blockchain. Instead, PoS users “stake” their coins via network wallets to secure the network. The way staking works is simple.
Keeping a certain amount of coins in your wallet allows you to participate in transaction validations. The more coins you stake, the more likely the chances are you get to add the next block of transactions to the network. In most PoS systems, a miner from those with the most tokens staked at the time receives the chance to add the blocks.
The advantages of a PoS consensus mechanism are immediately evident. For one, you don’t need to pour tons of resources into your network to keep it safe. Additionally, since nodes are chosen based on their amount of staked coins, there is never a scenario in which a node gains anything from validating incorrect transactions. Basically, a hacker would have to fully invest in the cryptocurrency prior to attacking the network. In this way, PoS systems create a huge deterrent to attackers.

The Future of Blockchain Technology

Blockchain technology has come a long way from its early days as a means to secure cryptocurrency networks. Today, blockchain technology has numerous uses across every type of industry imaginable. Specifically, blockchain programs have impacted the logistical, financial, and data security sectors in a major way.

Blockchain Technology Logistics

Blockchain logistical systems are more efficient and cost-effective to operate than traditional paper-based models. In fact, the immutable and unalterable nature of blockchain tech makes it ideally suited to logistical tasks. Soon, you may be able to ascertain much more information regarding the creation and delivery of your products thanks to these new-age systems emerging.

Fundraising

Blockchain technology has also altered the way in which businesses raise funds. In a traditional corporate crowdfunding strategy such as an IPO, companies must balance between cost-effectiveness and participation. The inability to process smaller transactions meant that for the longest time, companies had to turn away potential investors. Nowadays, blockchain technology enables businesses to easily automate these procedures via smart contracts.

Smart Contracts

Smart Contracts feature preprogrammed protocols that execute when they receive a certain amount of cryptocurrency sent to their address. These contracts live on the blockchain and enable remarkable functionality. For example, in the case of fundraising, a smart contract can automate processes such as the approval of investors and the distribution of funds.

Blockchain Technology Today

You can expect to see further expansion of the blockchain sector in the coming months as more governments and institutions explore its benefits. For now, the blockchain revolution is well underway.
submitted by BlockDotCo to u/BlockDotCo [link] [comments]

Subconsciously solving puzzles

Loved portal games and heard about this games puzzles and when I seen it on playstation store on sale I had to get it. I've notice something very interesting. When I'm stumped by a puzzle and cant for life of me figure it out I take a break from the game and spend some time not playing my console. Then after a few hours on of not even thinking about the puzzle I always manage to solve it within minutes as if I already knew the solution but I never gave it a single thought, this has led me to conclude that our brains subconsciously go over the puzzle and work out the solution without us even realising it at all. Like a super computer bitcoin mining in the background of our organic processes. Minimised and out of conscious thought. I think this is true because always after a period of absence from the game I always solve the puzzle than baffled me for half an hour within a minute usually. It can't just be luck for this to happen everytime. I've noticed that unless I go away from the game then I remain stumped and wont ever figure it out. It's like our conscious minds dont have access to as much raw power as the subconscious and I have to put this game to the back of my mind to be able to figure out the puzzle. Its amazing when I think about it. We truly are organic machines. Designed or perhaps random convergence but I refuse to believe this now. I'm not religious but I believe there is something more to the human being than simply an evolved animal. I'm loving the game and like games with this kind of subject matter like Soma, ect. I also like the Prometheus movie and alien covenant even though they are not really that popular but the subject of what makes us human and does a machine have a soul truly stirs something deep inside me. I long to find the answers to such things and after an event in my life where I had a near death experience and experienced something other worldly and profound I now look at the world differently and have become a believer in the quantum immortality theory due to this personal very hard to explain experience. Anyway I'm going off on a tangent and would like to conclude with asking does anyone know any other games like this or soma that have this kind of theme about what makes is human?
submitted by Ozymandies2003 to TheTalosPrinciple [link] [comments]

Cryptocurrencies are going to loose their value instantly somewhen in the next two decades.

Hi folks. So I just stumbled upon this subreddit and I hope this doesnt break the "no repetition" rule. So Im a computer science student and do some stuff concerning quantum computing. Some of you can probably guess what comes next, for those who dont I'll give a very brief explanation how that is related to bitcoin and so on. Im sure you all know the value of e.g. Bitcoins comes from the time it take to "mine" them. The reason for that being so relatively time-intensive is that current computers arent actually very good for these kind of computation. Thats a whole different matter with quantum computers though. Unfortunately the kind of computations which are required to mine Bitcoins are exactely the kind which comes incredibly easy for this the kind of technology. The times it takes even shrinks exponantially with the amount available quantum bits. While veing able to solve stuff better in new ways we werent able to before seems gemerally like a good think that means pretty bad news for everything concerning encryption, which means crypto currencies too. This would result in all emcryption becoming essentially worthless. Some is safely encrypted now a days because without the corresponding key a modern encryption would take literally millenia to brute force with normal computers. Quantum computers would make that a matter of days or even hours. Same goes for Bitcoins making them unreliable and unsafe, not to mention that the inflation would be unimaginable and be probably enough to destroy the whole concept on itself. Also recent successfull experimental setups have made it pretty clear that quantum computers with the expected capabilities Im describing here really are to be expected in the next 10-20 years.
Now I'd be interested in how aware the whole bitcoin community is on that matter and what the generel attitude about that is.
(also sorry for any bad english)
submitted by sinistercrowd to Bitcoin [link] [comments]

30+ Reasons Why Cryptocurrencies Are Worthless

1)It is possible to change the code through a miner vote or a fork and change the total supply or anything. DASH did it : they reduced the total supply from 84M to 18.9M a few years ago. They could also increase it to 999 Trillions if they wanted to so that millions of DASH are mined every week.

2)You can also fork bitcoin anytime , start over from 0 and claim it's the real bitcoin. (BCH , BSV , BTG , LTC , BCD etc)

3)Why would you pay $10,000 for a digital collectible unit called BTC when you can use BCH or TRX or LTC .. you name it. They work just as fine and cost less. There is no rarity like in gold.

4)Think of any amount you hold in ethereum as a gift card to use smart contracts on the ETH blockchain. Ridiculous. You’d rather hold a wal mart gift card or even simply cash.

5)Private keys may be bruteforced as we speak. Quintillions entries a second. When they’ll have enough bitcoins under control , they could move them all at once instantly.(At least 45,000 ETH have been stolen this way for now through ethereum bandit)SHA 256 is too old , bitcoin is 10 years old , it is not secure enough , quantum computing could potentially break it.

6)And that’s if people don’t find a way to create an infinite amount of coins to sell on exchanges.. it happened with monero , stellar , bitcoin , zcash , zcoin , eos , etc..

proofs :

“Bitcoin , Coindesk : “The Latest Bitcoin Bug Was So Bad, Developers Kept Its Full Details a Secret”an attacker could have actually used it to create new Bitcoin — above the 21 million hard-cap of coin creation — thereby inflating the supply and devaluing current bitcoins.”

Stellar : “Stellar Inflation: Glitch Leads to 2.25 Billion Extra XLM Printed”

Monero : “A bug in the Monero (XMR) wallet software that could enable fake deposits to exchanges has been recently brought to public attention through a Medium post”

Zcoin : Forged coins were created, but not exceeding 1% of the circulating supply. We will release further details on exact numbers when Sigma is released.

EOS : “Hackers Forge Billion EOS Coins to Steal Real Crypto From DEX “

Zcash : “Zcash Team Reveals It Fixed a Catastrophic Coin Counterfeiting Bug” etc..

7)Segwit , and especially Lightning network is a very complex technology and it will inevitably have flaws , bugs , it will be exploited and people will lose money. That alone can cause bitcoin to drop very low levels.

8)Then miners may be losing millions so they will stop mining , blocks may be so slow , almost no transaction will come though , and bitcoin may not have enough time to reach the next difficulty adjustement. This is reffered to as a death spiral. Then every crypto even those with no mining involved may crash hard.

9)Many crypto wallets are unsafe and have already caused people to lose all their investment , including the infamous “parity wallet”.

10)It is NOT trustless. you have to trust the wallet you’re using is not just generating an address controlled by the developper , you have to trust the node the wallet connects to is an honest node , you have to trust a Rogue state or organization with enough computing power will not 51% attack the network. etc..

11)Bitcoin is NOT deflationary. Bitcoins are created every blocks (roughly every 10 minutes) and you wil be dead by the time we reach the 21 million current hard cap.

12)Bitcoin price may artificially be inflated by Tether.

13)It’s an energy waste , an environmental catastrophy.

14)The only usecases are money laundering , tax evasion , gambling , buying on the dark net , evading sanctions and speculation.

15)Governments will ban it if it gets too big , and they have a big incentive to do so , not only for the obscure usecases but also because it threatens the stability of sovereign currencies. Trump could kill bitcoin with one tweet , force fiat exchanges to cease activity.

16)Most cryptos are scams , the rest are just crazy speculative casino investments.

17)It is pyramidal : early adopters intend to profit massively while last comers get crushed. That's not how money works. The overwhelming majority of crypto holders are buying it because they think they will be able to sell it to a higher price later. Money is supposed to be rather stable. That's why the best cryptocurrencies are USDT USDC etc..

18)The very few stores accepting bitcoin always have the real price in the local currency , not in bitcoin. And prices like 0.00456329 BTC are ridiculous !

19)About famous brokers listing bitcoin : they have to meet the demand in order to make money , it doesn't mean they approve it , some even short it (see interactive broker's CEO opinion on bitcoin)

20)People say cash is backed by nothing and losing value slowly , and yes it is very flawed , but there is a whole nation behind it , it's accepted everywhere , you can buy more things with it.

21)Everybody in crypto thinks that there will be a new bullrun and that then , they will sell. But because everybody thinks it will happen , it might not happen. The truth is past performance doesn’t indicate future performance and it is absolutely not guaranteed that there will ever be another bullrun. The markets are unpredictable.

22)Also BTC went from about $0.003 to the price it is today , so don’t think it’s cheap now.

23)There is no recourse if you’re scammed/hacked/made a mistake in the address etc. No chargebacks. But it might be possible to do a rollback (blockchain reorganization) to reverse some transactions. BSV did it.

24)In case of a financial crisis , the speculative assets would crash the most and bitcoin is far from being a non speculative safe heaven ; and governments might ban it to prevent fiat inflation to worsen.

25) Having to write down the private key somewhere or memorize it is a security flaw ! It’s insane to think a system like this will gain mass adoption.

26) The argument saying governments can not ban it because it is decentralized (like they banned drugs) doesn’t work for cryptos. First , drugs are much harder to find and much more expensive and unsafe because of the ban , and people are willing to take the risk because they like it. But if crypto is banned , value will drop too much , and if you can’t sell it for fiat without risking jail , goodluck to find a buyer. Fiat exchanges could close. Banks could terminate every crypto related bank account. And maybe then the mining death spiral would happen and kill all cryptos.

27) Crypto doesn’t exist. It’s like buying air. It’s just virtual collectibles generated by a code. Faguzzi, fugazzi, it’s a whazzie, it’s a whoozie.. it’s a.. fairy dust. It doesn’t exist. It’s never landed. It’s no matter, it’s not on the elemental chart. It… it’s not fucking real!

28) Most brilliant guys have come out and said Bitcoin was a scam or worthless. Including Bill Gates , Warren Buffet , The Wolf Of Wall Street…

29) Inflation is necessary for POW , BTC code will have to be changed to bypass the 21M cap or mining will die ! If BTC code is not changed to allow for miners to be paid reasonably , they will cease mining when the bitcoin block reward gets too low.Even monero understood it ,the code will have to be changed to allow for an infinite bitcoin supply (devaluating all current bitcoins) or the hash will decrease and the security of bitcoin will decrease dramatically and be 51% attacked

30) Don’t mix up blockchain and cryptos. Even blockchain is overrated. But when you hear this or that company is going blockchain , it doesn’t mean they support cryptocurrencies.

31) Craig Wright had a bitcoin mining company with Dave Kleinman (he died) and on january 1 2020 he claims he will be able to access the 1.1M BTC/BCH/BTG from the mining trust. He may or may not dump them on the market , he also said BTC had a fatal flaw and that by 2019 there will be no more BTC.

32) Hacks in cryptos are very common and usually massive. Billions of dollars in crypto have been stolen in the last 6 years. In may 2019 Binance was hacked and lost 7,000 BTC (and it’s far from being the biggest crypto hack).

33) Bitcoin was first. It's an ancient technology. Newer blockchains have privacy, smart contracts, distributed apps and more.Bitcoin is our future? Was the Model T the future of the automobile? (John Mc Afee)

34) IOTA investiguating stolen funds on mainnet. IOTA shuts down the whole network to deal with trinity wallet attack.

35) Compared to bitcoin other cryptos work just as fine and don't waste so much energy.

36 ) Everytime miners disagree on the updates it will create another version of bitcoin : problem of governance and legitimacy.

37) Cryptos are only legitimate if they act as a credit for a redeemable asset like USDT or gold backed coins.


While the native language of the writter is not english , I think you get the point and it doesn't make it any less relevant.
submitted by OverTheRedHills to u/OverTheRedHills [link] [comments]

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Can Quantum Computers Hack Bitcoin / Ethereum? - YouTube Will Quantum Computers BREAK Bitcoin Someday? (Explained For Beginners) THE BIGGEST THREAT TO BITCOIN THAT NO ONE IS TALKING ABOUT? Quantum Computing to destroy BTC? renting Quantum computer for mining Etherium in 2017? QASM is here and it's API Can the Google Quantum Computer Hack Bitcoin?

Quantum computing and Blockchain [] QC attacks []. The most dangerous attack by quantum computers is against public-key cryptography. On traditional computers, it takes on the order of 2 128 basic operations to get the Bitcoin private key associated with a Bitcoin public key. This number is so massively large that any attack using traditional computers is completely impractical. The kind of power that Quantum computers possess, can be very easily used for a process as energy intensive, as Bitcoin Mining. It’s true that quantum computers are very different from your ordinary, run of the mill computers, because of the sheer power that they use, when it comes to computing. The quantum computing threat to bitcoin is equivalent to asteroid mining threat for gold. — Cincinnatus (@CincinnatusBTC) September 22, 2019 Currently, calculation of a bitcoin private key as derived from a public key currently requires 2^256 guesses — a number so large that all the computers in the world connected to one another could not ... As long as multiple users have access to a quantum computer, no single quantum computer will gain dominance over Bitcoin mining. Alternative proof-of-work mining schemes can also prevent quantum dominance, and some studies have found that ASIC devices, which are already faster than normal computers, can reduce the quantum advantage over mining. Quantum computing is typically feared due to its potential to render bitcoin obsolete by cracking its cryptographically secured public keys. However, one analyst alleges that there may be a much simpler way to do it: by beating bitcoin at its own game.

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Can Quantum Computers Hack Bitcoin / Ethereum? - YouTube

Watch how quantum computers are here and if it's qubits can do anything with ECDHA keys as the crypto algo is of the following formula P=NP which reminds quantum computing. This is a topic that has been covered quite a bit but it is VERY TECHNICAL. So in this video I'll cover the potential risks from quantum computers that Bitcoin and other similar cryptocurrencies face! Is quantum computing a threat to Bitcoin? How can Bitcoin become more secure against a quantum computing attack? Will this upgrade require moving coins to ne... Quantum Computing - Is Bitcoin In Danger? - Duration: 10:16. Young And Investing 2,078 views. ... What It Was Like MINING Cryptocurrency Full-Time For A Year Tails Health Update ... Quantum Computing to destroy BTC? FUD TV. ... Bitcoin, Silicon Valley, & The Future of Money (w/ Tim Draper & Mike Green) - Duration: 56:20. Real Vision Finance 49,572 views. ...

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