Oh, am I stupid. Someone mentioned having lent his Schneier to someone. Hmmm. I wondered what book that would be, maybe I would want to buy a copy. So I charged off to look in the bibliography in Applied Cryptography. Strange, there are some articles listed by him, but nothing seems to fit, yet this book is so new... In any event, I really am enjoying Applied Cryptography, by Bruce Schneier. You could have lent your copy of it... -kb, the Kent who can be so slow -- Kent Borg +1 (617) 776-6899 kentborg@world.std.com kentborg@aol.com Proud to claim 28:15 hours of TV viewing so far in 1994!