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timtyler comments on Cryptographic Boxes for Unfriendly AI - Less Wrong
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Cryptography only gives a false sense of security if it based on false assumptions. The barriers don't just look confusing to me---I have a proof that they look confusing to any system that can exist in the physical universe. Maybe the proof is wrong. Maybe the laws of physics don't look anything like physicists expect (maybe there is a super special law which just breaks my cryptographic scheme), or maybe I incorrectly assumed a problem was outside BQP, or maybe I was too optimistic about the constants in the best attack. But notice that all of these are opportunities for me to be wrong. There is no opportunity for an AI to outthink me if I am right. That is the beauty of cryptography.
Having said that, most cryptography isn't like that. There's no proof that AES is secure, just that it creates a lot of muddle that nobody yet knows how to untangle. There's no proof for the common public key schemes, either. They depend on the difficulty of things like factoring large numbers - and we don't have a proof that that is as difficult as it currently seems.