> I assume it's also possible that quantum computers, if and when they materialize at scale, would defeat classical encryption. Only some existing systems are

> I assume it's also possible that quantum computers, if and when they materialize at scale, would defeat classical encryption. Only some existing systems are known to be broken under quantum computing. Then it comes down to the implementation details. https://en.wikipedia.org/wiki/Post-quantum_cryptography https://en.wikipedia.org/wiki/Post-quantum_cryptography