Re: Are there...

2003-11-18 Thread Jerrold Leichter
| As David Wagner points out, encryption with a public key (for which the | private key has been discarded) would seem to work. There's something seriously wrong here, however. There are many close, but not identical, definitions, of a one-way hash. While none of them explicitly say so, many *use

Re: A-B-a-b encryption

2003-11-18 Thread Jerrold Leichter
| > it came up lately in a discussion, and I couldn't put a name to it: | > a means to use symmetric crypto without exchanging keys: | > | > - Alice encrypts M with key A and sends it to Bob | > - Bob encrypts A(M) with key B and sends it to Alice | > - Alice decrypts B(A(M)) with key A, leav