‚‚‚‚Assymetic crypto systems such as Diffie-Hellman, El-Gamel, and DSS, allow the private key to be a randomly chosen number. ‚But, as a cute hack, instead of using a random number, for the private key, you could use a hash of the User Name, and a password. Doing so allows the users to generate their private key on demand. They don't have to store the private key, and if they want to work on a another computer, they don't need to bring along a copy.‚ Has any one tried this? Is there existing software that does this? Any comments on the security of such a scheme? ‚ The only draw back that I can think of is the potential lack of randomness in the key. If the user chooses a bad password, it would be possible to brute force the public key.‚ Harv.‚‚RedRook@yahoo.com‚‚‚‚‚‚‚‚ _________________________________________________________ DO YOU YAHOO!? Get your free @yahoo.com address at http://mail.yahoo.com