On Sun, 2003-05-11 at 16:05, Paul Walker wrote:
I submit that if Joe Lunchbox is not spamming, he is unlikely to need to change his habits regarding having his machine available
Mostly unrelated to this, but something's just occurred to me. Probably I'm being really stupid, but ... for the receiving MTA to know that the problem has been processed properly, it would have to know the answer. How does it know what the answer should be?
I believe the usual approach to this is to have it be a asymmetrictry hard problem - i.e. factor some primes to do the work (hard), multiply them to validate answer (easy). -- Nathan ------------------------------------------------------------ Nathan Neulinger EMail: nneul@umr.edu University of Missouri - Rolla Phone: (573) 341-4841 Computing Services Fax: (573) 341-4216 --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to majordomo@metzdowd.com