this post was submitted on 20 Nov 2024
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No, the Chinese Have Not Broken Modern Encryption Systems with a Quantum Computer - Schneier on Security (www.schneier.com)
submitted 2 days ago by steventhedev@lemmy.world to c/technology@lemmy.world
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[–] bunchberry@lemmy.world 2 points 16 hours ago

Yep. Technically you could in principle use Grover's algorithm to speed up cracking a symmetrical cipher, but the size typically used for the keys is too large so even though it'd technically be faster it still not be possible in practice. Even with asymmetrical ciphers we already have replacements that are quantum safe, although most companies have not implemented them yet.