How quantum computers might affect Bitcoin

Are quantum computers a threat to the Bitcoin protocol? I'm trying to wrap my head around how some cryptographic algorithms might be vulnerable, which could mess with personal security. The world seems ready to embrace Bitcoin, but quantum tech might create some risks down the line. The Bitcoin community is working on a solution called QuBit to tackle these potential issues from quantum technology. I'm really curious about what’s happening with "QuBit" and any updates on its development.

And yet another QC topic started here..... Folks, this has been discussed ad-nauseam in literally DOZENS or more threads. Try READING what has already been posted and perhaps join in on one of the existing topics if you are unsure about anything. Spoiler alert: QC's are not even close to being a threat for at least a decade or more. They can barely do basic math much less anything cryptographicly significant.

Here we go: Is a theoretical quantum computer destructive for bitcoin? Yes. Is there such a thing practical to implement? For all I know, no. It's a process that still requires a lot of development. Some questions people have are still open with no answer. Can bitcoin migrate to a quantum resistant algo? Yes, check the mailing lists, they're discussing about it every day.Will it take years for bitcoin to migrate? Yes. At least five.

They have been countless discussions on the forum concerning how quantum attacks would be a problem for Bitcoin in the future and you can verify this by using the search bar. However , the basis of all the arguments are all theoretical and barely practical yet. Quantum computing in itself hasn't even been used fully yet let alone against bitcoin. Regardless of it ever becomes a pressing issue as a threat to bitcoin probably in the future (although I think it is very unlikely, bitcoins protocol too will be updated.

Similar topics have been discussed severally here. Op, I checked your profile to know that you've been on the forum since 2024 but there's a habit you're yet to learn. It's important that you make sure to always search about a new topic you're developing before posting it. It saves time and leads to more productive discussions, especially for newcomers learning complex systems like Bitcoin. Now to your question, for now, quantum computers don’t pose a real danger to Bitcoin. “QuBit” isn’t a Bitcoin solution but the protocol can migrate to quantum-resistant signatures in the future and there’s plenty of time to do that safely.

There are many unanswered questions that are of fundamental interest to us. QC technology is still in its infancy and as far as we know, destructive processes that interfere with Bitcoin mathematical functions can have a negative impact on Bitcoin price. There is much we do not know about this in terms of technical knowledge, but it is interesting to know the strategic steps taken by the Bitcoin community to counter these destructive activities. The Bitcoin community must upgrade its defenses to address these risks. There is still a long way to go. Some critics are engaged in a negative campaign to mislead Bitcoin investors.

I doubt it, considering limited transaction throughput. But it's different case if you consider centralized sidechain or layer 2. Are you referring to unit in quantum computing, a fork proposal (https://github.com/cryptoquick/libbitcoinpqc) or something else?

Ask LLM or Google for that matter why quantums won't be such a big issue for BTC. And report what you've found.

I will post it again here: is Quantum Computing a threat to Bitcoin?Should Bitcoiners even engage with quantum FUD?Quantum Computers Can Not Defeat Bitcoin, not even The Bitcoin NetworkShould wallets warn if you re-use addresses due to quantum computers?Bitcoin will be vulnerable to Quantum Computers in about 2 yearsAbout quantum computing, address reuse when you have 50+ addressesUnderstanding Bitcoin vs QuantumQuantum computers and Bitcoin For sure it will pose a threat to Bitcoin, but devs might be just one step ahead of the game and they could have been preparing for many years and be ready for it.

Quantum computers are often mentioned as a future threat, but I think it’s still very far from being a real problem for Bitcoin. Right now, practical quantum machines that could break Bitcoin’s cryptography don’t really exist yet. Also, Bitcoin isn’t static. If quantum computing becomes a realistic risk, the protocol can be upgraded long before it’s actually exploitable. We’ve already seen how consensus changes happen when needed. About “QuBit”, I think a lot of people confuse the term itself with specific solutions. It would be interesting to see real research or proposals instead of just general concerns. Do you think this topic is more about long-term preparation, or is it mostly theoretical fear at this stage?

Yes I am talking about the QuBit soft fork for signature verification, which is an ongoing project to develop a stronger QC defense system. QuBit is part of a long-term plan where QC is considered a potential risk. Perhaps by this year or more year a lot of progress will be made in strengthening the defenses. It is not a matter of fear in principle, but it is better to be prepared for possible threads.