Patent ID: 7107246
Filing Date: 2006-09-12
Classification: G06F,G06Q,G07F,H04L

Abstract:
1. A method of exchanging secured messages between first and second registered PEAD users over the internet and a server utilizing at least one PEAD, comprising the steps of: a PEAD sender obtaining a PEAD receiver's public key using the receiver's user ID as an index from the server; the sender creating a shared secret using the receiver's public key and said sender's own private key; the sender then electronically encrypting a message with the shared secret, and sending the encrypted message appended with the sender's user ID and the receiver's user ID to the receiver; the receiver receiving the encrypted message appended the sender's user ID and the receiver's user ID from the sender; the receiver requesting only the sender's public key from the sender; the receiver receiving the sender's public key from the sender; the receiver decrypting the encrypted message by deriving the shared secret using the sender's public key and said receiver's own private key, wherein the encrypted message remaining encrypted while handled by the server.