Another great value reference: A. Menezes, P. Oorschot and S. Vanstone, "Handbook of applied = cryptography," CRC Press, 1996 All chapters are available for free download at = http://cacr.math.uwaterloo.ca/hac/. See http://www.mindspring.com/~pate/C for the implementations in C = language of most of the algorithms. Regards Romeo Costanzo > For obvious reasons I cannot elaborate further but I'd=20 > suggest reading the > reknowned "Applied Cryptography" for a good explanation and examples. > John >=20 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.