But, once person A creates public key X, nobody else can sign messages using X. So if all messages from A are signed under X, we can know that they are all from the same person, even if they are sent anonymously or under a pseudonym.
Who's to say that person B sees a message signed under X by person A. He copies the signature (X) onto the bottom of one of his messages and everyone thinks they can verify that it's from A but it's really from B. (makes sense to me anyway...) Chael Hall Chael Hall | Campus Phone Number iuvax!bsu-cs!nowhere | (317) 285-3648 00CCHALL@bsuvax1.bitnet | iuvax!bsu-cs!bsu-ucs!00cchall | "I hate it when that happens!"