Patent ID: 6115735
Filing Date: 2000-09-05
Classification: G06Q,H04L

Abstract:
A message guaranty system connected with a plurality of terminals on a network, comprising:message delivery means for delivering a message from a transmitting terminal to a receiving terminal;evidence information preparing means for preparing by a third party evidence information attesting to the transmission and reception of said message and storing the evidence information in a first memory; andevidence information furnishing means for appending to said message delivered from said transmitting terminal to said receiving terminal, said evidence information prepared by said evidence information preparing means;means, included in said transmitting terminal, for transmitting said evidence information to said receiving terminal through said message delivery means; andevidence information verifying means for accepting from the receiving terminal a message containing evidence information received by the receiving terminal, for receiving from the evidence information preparing means and storing in a second memory the evidence information prepared by said evidence information preparing means, for comparing the evidence information contained in the received message with the evidence information stored in said second memory, and for sending to the receiving terminal, if the evidence information in the received message is determined to correspond to the evidence information stored in said second memory, data attesting that said received message is the message that was transmitted by the transmitting terminal.