clipper/chosen plaintext attacks

[Matt Thomlinson]

even with plaintext/ciphertext pairs, it has been shown that hundreds of 
millions of pairs are needed to determine anything about the key 
involved (DES). 

I'm sure some of the many responses to your post will include more 
precise facts.

Matt Thomlinson                               
University of Washington, Seattle, Washington.      phone: (206) 548-9804
Check my home page -- ftp://ftp.u.washington.edu/public/phantom/home.html 
PGP 2.2 key available via email, or finger phantom at hardy.u.washington.edu