Is quantum computing a real danger for cryptography?

Honestly, I don't see it that way. I think it might pose a threat in 15-20 years or maybe longer, but it's not something that’s right around the corner, plus it's definitely possible to get ahead of it. It could be a real concern, but only if cryptography stands still during that time. Otherwise, it's pretty similar to the Y2K hype where just a date change caused a lot of panic. Whether it's a threat or not, there's a ton of talk about it in the news. This actually lessens the danger since cryptographers have been looking at alternatives for ages, and there’s ongoing discussion about potential solutions in Bitcoin too. I think of it as just another chapter in the evolution of cryptography. We're expecting a big shift in how things work. What’s happening now with quantum computing and cryptocurrencies reminds me of the past: remember DES, RC4, MD5, and SHA-1? Those all got phased out, and we adapted to new systems without too much hassle. So sure, we should be careful about the future, but we shouldn’t go overboard with the hype. The risk is real, but it seems more relevant to governments and sensitive information. Anything protected by our current encryption methods could be saved and then decrypted years later: "harvest now, decrypt later."

The timing or will is say the timeline is the key factor in this discussion. A lot have already been said about Quantum computer and the future threats it possess. We've read severally how it'll be powerful enough to break the current cryptography but I don't think it'll happen overnight, also Bitcoin will not remain unchanged till eternity. There's still room for developers to upgrade to more quantum-resistance algorithms before it becomes too difficult to manage.

Quantum computing at least so far is not a real threat to cryptography and Bitcoin blockchain. If it has been already a really big threat, it would have been used widely and there would have been severe reported cases with use of Quantum computers to attack something. In addition, if it has become such a dangerous threat not only for Bitcoin, but also for cryptography generally, governments would take action against this, to restrict quantum computing development like what we have witnessed their regulatory actions against AGI development recent months. Lastly, if it is an actual threat, it would have been used in societies rather than "limited" used only in Google labs.

I think it is real that the funds will exist someday. In several articles, I read that there are many companies developing this Quantum. Some of them are IBM, SpinQ, Google Quantum AI, Microsoft, Intel, Honeywell Quantum Solutions, Quantinuum, IonQ, D-Wave Systems, Xanadu, Quantum Circuits, PsiQuantum, Infleqtion, Quantum Computing Inc, ALICE & BOB, QuEra Computing, Amazon Web Services, and NVIDIA. In their reports, they are developing Quantum computers, but the results are not yet perfect they are still in the early stages. I once read that America has banned ECDSA Technology starting in 2030 and at the latest until 2035.

A lot of time for bitcoin devs to upgrade the software to quantum resistance algorithms. We even have several proposal already, albeit the other one is controversial that's why it didn't get the consensus. So devs are all well obviously, they just need to really sit up and talk what is the best approach so that by the time quantum computers arrived, we have upgraded and most of us have moved to the new format addresses to be safe.

Yeah it’s something to watch, but still not a real threat right now. Development is ongoing, but for now Bitcoin works fine, even in things like betting.

There is one thing that I am happy about, that this quantum threat isn't for Bitcoin alone but for every other data out in the world, even the military and centers aren't safe, that includes cloud centers too. It will reach everybody and thats why these companies will not release a quantum computer until it's safe to do so, the world must be safe from the threat first before that thing is released. This is the reason why I don't worry about quantum threa at all, now that Black Rock and others are here you think that they will sit back and let Quantum computer destroys their struggles for the past many years now? Too many powerful connections are with Bitcoin right now, nothing bad is going to happen.

It's not as dangerous as people have claimed, that the development of quantum computers by several large technology companies will spell the end of Bitcoin. several solutions have been proposed, and the best ones will be adopted and implemented quickly if they become a threat to Bitcoin. but, quantum computers are still far from perfect and capable of breaking modern cryptography, so the threat is still theoretical. while quantum computers could pose a threat, they are still a long way off from being developed, so they are not yet a threat.

Yeah, quantum threat is still far away, not real problem now. If it gets serious, bitcoin can adapt.

You mentioned that this could be a threat in the future, although I don't think so. Since the Bitcoin blockchain process can be updated, do you think this technology can't be updated with quantum? If so, please elaborate, where even experts will start thinking about this now!!

Just last month, Google Quantum AI and Caltech published a landmark paper showing that breaking Bitcoin's ECC-256 encryption could require fewer than 500,000 qubits a massive drop from the 20 million previously estimated and thats means Their math suggests that once a machine of that scale exists (targeted by some for the early 2030s), it could crack a Bitcoin public key in about 9 minutes. So if you ask is quantum computing really a threat to cryptography? the answer would be yes, this also become a threat to almost all of today encryption. And all that progress could go faster with the help of AI dont u think? Maybe we need a whole upgrade for this and different address different mechanism

Quantum computers will be a problem for everything that is protected by cryptography, not only for Bitcoin as you say - and that means that many experts are not sitting idly by but are working to ensure that everything that needs to be protected remains protected. AI will probably be of help in this, but I think that AI in combination with quantum computers will be a far greater threat to humanity than most of us can even imagine today. Even if in the next 5-10 years such powerful quantum computers appear that they can crack the public BTC key, all you have to do is not use the same address more than once - you send the transaction, the rest goes to the change address and the problem is solved.

Exactly! It can be a threat after a decade or more but it will only be a threat if we fail to migrate on time. That's also correct. Quantum computing is a threat to public-key cryptography because attackers can store encrypted data today and decrypt it once the quantum computer will be available for them.

I have seen many similar topic disscusiion on maany places where people were having discussions on the same points. But no one was so sure about the future, whether it will damage the bitcoin and other countries' currencies or will help them to keep the crypto space enviroment more stronger. So, there is nothing wrong in saying this; all we can do is speculate about this technology right now, and no one has any idea how the technology will be used. For just now, I am putting an example in front of you of recent days' AI systems like ChatGPT and many more, like video-making AI tools and images as well. Such tools are being used for both purposes by different people; I mean, it is also being used for evil tasks or also for good tasks at the same time. So, its all depends on the perosn that is using it. And same here, the usage of Quantum computing will also depend on more who is using it for what performing kind of task. Well, this is my point of view. What do you say?

Quantum computers are another version of computers that I don't think they will make if available for individuals because it will not only become threat to cryptocurrency but to a lot of things so we need to know all this things now that they won't make it available because it's just as if quantum computer have the ability to actually crack anything it's going to be scary the best thing is just for it to be in the possession of the government if not there is going to be a lot of problem around the whole agency, and things like this will provide a lot of solutions to a lot of problems.the possessions is what am scared of and definitely what the government is also shared of so let's just wait to see the outcome.

You don't have to wait for disease to spread over your system before you look for a cure. The Quantum discussion didn't start today, it has been on for years but it just that the effect on cryptography hasn't received so much attention like before and you know Bitcoin drives on speculation, now that there is development from Google about the Quantum computers. the developers will have to act fast than wait because of how sensitive it's to migrate signature, you saw the BIP 360 that was drafted recently and how people reacted to freezing of Satoshi wallet? Now imagine if Quantum computers are in existence and we are still fighting for the solution. You are cool that government will take control like you forgot governments are collection of human beings that are greedy and self determine. What if the same governments start going from wallet to wallet to seize Bitcoin, do you think it's okay to let that slide where decentralization exist? No! We want Bitcoin be free from detectors and anything that can cause harm to Bitcoin, it's better Bitcoin remained immune to quantum computers.

Actually I think quantum computing is not only a threat to something like BTC or crypto, it can be  threat to the whole financial markets, stock exchange patterns and many other things, if it really goes to its good level of operations, then it wont be just the BTC getting effected, still there is some time till then, and who knows if the quantum computing really goes to that level or something else happens.

Called a threat maybe this is still feasible in the future but for now it is not that serious because after all, in addition to the hype that is made big in the end some of us always assume that quantum is capable without thinking that bitcoin also always develops when a threat comes. Indeed this can be a threat but that does not mean we should always make this a source of concern because in the end it is precisely by worrying too much that will make us forget the important thing here, namely the prudence we have. Wallets can be lost and we cannot control them anymore even without quantum technology when we are not careful so instead of worrying too much about things that may not even be certain to happen it would be better to focus on how we protect our assets and wallets so that they do not backfire on ourselves and lose them.

Agree with this, quantum can be a serious threat to all aspects. But for the near term, they are still in a safe stage. There is no need to panic, indeed technology continues to develop and there will always be changes. Some developers have been working. Proposing BIP, although they have not found the best solution yet, but I think they will continue to work to achieve better development. For now, we must be prepared and that will certainly happen.