Date: Fri, 15 Jul 1994 17:09:47 -0600 (MDT) From: Berzerk <berzerk@xmission.xmission.com> Subject: Re: Triple encryption...
I'd be most concerned about any ciphertext-only attack which is improved by having purely random bits as input. Whichever algorithm is more resistant Ahhhhhhh, I don't know how to say this, but no such atack exists, and none will ever exist. You can not EVER atack a cipher if the plaintext is "random", as you have no basis for saying which "plaintext" is in fact
On Fri, 15 Jul 1994, Carl Ellison wrote: the "plaintext". Now if you know the plaintext(random bits) this is a different story.
Call it a hunch. I didn't say I knew of any such attacks. In fact, I used to believe that such are completely impossible (and may yet come back to that belief), but for the moment, I'm entertaining the notion of such attacks and seeing where that leads me. If there were such attacks, they would rely on information about the key leaking into the ciphertext, independent of the plaintext. It might be possible to prove that any key-driven permutation (1:1 mapping) can not allow such attacks, but I haven't composed such a proof yet. - Carl