EncryptionSecurity: - At the heart of our software is an El Gamal-based 128-bit public/private key encryption system. Embedded within every message sent from PointClear HCS is the sender's 128-bit public key. Upon receipt of e-mail, the sender's public key is automatically entered into a database of keys in the recipients system. For those recipients who do not use PointClear HCS, a universal reader/responder can accompany the encrypted message, allowing the recipient to easily decrypt the message and respond with an encrypted message. From that point forward, all e-mail between the sender and recipient can be transmitted securely.