[stavros]

No? That's like saying "if my glass can fit a drop of water, then it can also fit an ocean". There is an upper bound to how much processing power there can be in the universe, and 512 bit keys need more than that to be cracked.

[esperent]

That's assuming classical computers though, right? What about future quantum computing developments?

[X6S1x6Okd1st]

I guess it depends on the algorithm they chose, HChaCha20 is the symmetric encryption algorithm for libsodium.js which is quantum resistant.

https://doc.libsodium.org/secret-key_cryptography/secretstre...

https://crypto.stackexchange.com/questions/79518/is-xchacha2...

[jmprspret]

Most if not all symmetric encryption is quantum resistant though (with a large enough key). Quantum computing only causes problems for asymmetric algorithms that involve factorisation iirc

[johnhenry]

The key words here are "brute force" -- there might be some [possibly quantum] techniques around it, but probabilities around guessing and checking an arbitrary number remain constant.