This is so cool. This feels so much like cheating that I was sure it must be flawed, but I couldn't come up with any weakness. I conviced myself that this is

This is so cool. This feels so much like cheating that I was sure it must be flawed, but I couldn't come up with any weakness. I conviced myself that this is possible by considering the method of using a different permutation of the same key pair on each website and storing that permutation, encrypted, in a cookie. Cryptography is awesome.