Quote from: hatshepsut93 on January 11, 2020, 08:35:34 AM

People don't upgrade their nodes because they are compatible with the network, if there was a hardfork, you can expect them to switch rather quickly. Look at ETH or other alts, they have hard forks almost every year and they go pretty smooth.

a hard fork is not required to implement a post-quantum signature scheme. (that's probably a good thing since bitcoin isn't some centralized shitcoin---BCH and BTG are what happens when people try to hard fork it)

what are you saying---that we can literally just wait until ECDSA is broken and then do an emergency hard fork? that won't work. by then it's too late: QC could possibly break transactions in-flight, meaning the entire bitcoin supply is at risk of theft---outputs being moved to quantum safe addresses could be stolen in that scenario. even if QC weren't fast enough to do that, there would be 5+ million coins ready for the taking on day 0. are you considering the potential consequences of that?

Quote from: hatshepsut93 on January 11, 2020, 08:35:34 AM

If quantum computers became real today, the world would be in a lot of trouble - bank account, emails, websites, military communications, classified data and so on - but you don't see them proactively moving to post-quantum crypto right now

centralized organizations can implement new encryption standards at the drop of a dime. bitcoin cannot do that because it's decentralized. and as outlined above, its inability to do so puts the entire monetary base at risk.

Quote from: hatshepsut93 on January 11, 2020, 08:35:34 AM

And cryptographers usually retire algorithms long before they become not even fully broken, but just weakened.

some cryptographers say ECC/ECDSA will be broken in the next several years......