Bitcoin Forum

For a few years there are news that quantum computers pose considerable threat to Bitcoin and other cryptocurrencies.

On the other hand there are some cryptocurrencies that are allegedly "quantum safe".

I know there is long way left to for quantum computers to be functional enough to put Bitcoin at risk, but I'm still wondering what could happen in future and if our BTC funds are at risk.

So my questions are:
What makes cryptocurrency quantum safe?
And could Bitcoin be upgraded to be quantum safe?

Your bitcoin is safe from quantum computers if you do not reuse your bitcoin address, the addresses that will be affected are those that their public keys have been exposed. If you spend from your address, your public key will be exposed, so do not reuse address.

Yes, there are proposals already.

Since they said stuff like this, do they explain why that's the case? I'd be surprised if they're just throwing claims and people believe them, even if they're just retail traders with little to no experience. It feels like "quantum safe" is becoming another term that gets mentioned so many times, like "military grade encryption". I think this convo about quantum resistance algorithm has been going on for years too, so it's not really new afaik.

From what I understand, if you want to be quantum safe then don't used the same Bitcoin address. Or move your existing Bitcoin to a new address.

For sure Bitcoin developers have seen it already, and they might be already prepared. Yes, Bitcoin can be upgraded, right now if I'm not mistaken, we're using existing SHA-256. Perhaps in the future they could developed quantum resistant hash function.

Got curious to research about what are those cryptocurrencies which is quantum safe as what you have said and here is the result https://coinmarketcap.com/view/quantum-resistant/

Also for what I know yes Bitcoin can be upgraded to be quantum safe, but this collective decision by node operators, developers and miners to implement this new cryptographic standard.

This situation seems hard to happen if no coordination will happen. But let see if Bitcoin network evolves in future in response to that quantum threat.

Completely random projects, well expected because this is nothing more a selling strategy for those team and may not even be real that they are resistant to wuantum attacks.

The Bitcoin network is not in any danger because we are far too early for quantum computing to become real that will be able to affect the exposed public keys of Bitcoin addresses and access the coins. And to make it quantum safe we just need to fork it. :)

Quantum computers pose a threat to complex mathematical problems, especially in crypto, but so far we haven't seen any real, or direct threat from quantum computers. I don't think quantum computers exist yet, or perhaps they are still in their infancy. If quantum computers do exist, then I think it is possible that all types of cryptocurrencies will be impacted by the speed of their calculations. I don't know exactly how crypto will handle it, but it is clear the digital world is in trouble, including banking security.

Let me try attempt on your question.

1. Bitcoin network protocols are part of the solid evidence that backs it up as being unable to be altered, which is the reason for its immutability, more about blockchain technology could also be learnt well.

2. I don't know if by now it's seeing quantum as a threat as some would have claimed, the nodes are not going to be easily attacked except there's a break in the protocols of the blockchain technology on the bitcoin network.

How many Bitcoin do you have though, that you are this worried about Bitcoin? Leave the worries to those who have 100 BTC and more because if these people are not moved about quantum computer so should you, we have discussed this many times before you can use the forum search to find many quantum computer discussions.

Bitcoin is not abandoned, they are devs working all the time, if quantum computer is ever going to be a problen a single update is enough to fix the problem, you are not a developer yourself so I suggest you should focus on getting more Bitcoin, have you seen any quantum computer lately? That's another reason why you should calm down, even if one will exists it will cost alot of money, the computer builders of the world haven't made such machine yet.