How to hard-fork to save most users’ funds in a quantum emergency
Suppose that it is announced tomorrow that quantum computers are available, and bad actors already have access to them and are able to use them to steal users’ funds. Preventing such a scenario is the goal of quantum-resistant cryptography (eg. Winternitz signatures, STARKs), and once account abstraction is in place, any user can switch to using a quantum-resistant signature scheme on their own schedule. But what if we don’t have that much time, and a sudden quantum transition happens long before that?
