CypherSIGN: digital signature for MS-Outlook Express messages. CypherSIGN authenticates the sender and the message contents, quickly and without public-keys nor certification authorities! CypherSIGN uses SHA256 algorithm to provide a 1536 bits digital fingerprint to each message, making impossible to anyone to change it or to copy the digital signature to another message. CypherSIGN is very fast and easy to use. Try it now freely!
