I searched this forum and others where… but did not find any heuristic answer…
I've no idea what you mean by "heuristic answer", either. I'd say, you clearly did a very bad job at searching in this forum because the topic of quantum computers threatening possibly Bitcoin and whatnot other crypto currency pops up every now and then.What is your background on quantum computing? I ask, because it's a bit tedious to discuss with people who basically don't have much clue about it and ask as if the current state is almost there to destroy crypto. Not an expert though, far from it.
Why do you think current state of quantum computing is any near to solve real world problems or be actually a problem for security? Seriously, where is real quantum superiority besides for some very special and carefully crafted cases to show quantum advantage, likely to secure more funding?
Don't get me wrong, I don't want to dismiss quantum computing. It's a hyped topic, a lot of money is pumped into research and building such devices, but so far number of reliably usable qubits, qubit stability, length of decoherence time is in my perception very underwhelming. Personally, I believe, we're decades away from any serious possible threat to crypto. Convince me, otherwise!
*The question implies (I guess) that I get the opinion that no one cares.
If you jump predetermined into the discussion or based on your poor search skills which gave you a wrong impression, what do you actually expect? This place here isn't likely a spot for quantum computing experts to discuss with.The worst case for attacks assumes an idealized quantum computer with sufficient capacity and reliability to perform the attack. It’s likely that the capacity and reliability of quantum computers will increase gradually over time, meaning the security of the cryptography used in Bitcoin will similarly decrease gradually over time, with attacks progressing from computationally infeasible, to theoretically possible but implausible, to extraordinarily expensive, to very expensive, to practical. As long as this progression is followed and is possible to publicly track, it’s likely Bitcoin can continue using its currently highly space efficient cryptography while it remains safe, and then upgrade to post-quantum cryptography when it looks like it’ll soon become necessary.
It's a pragmatic approach and in my perception far from being "no one cares" because simply there's no need to rush it hastily.@ABCbits
Your post and links deserve more merit, but I'm always terribly low on available smerits to give.
