Patent ID: 7311246

Claim:
A method of transmitting electronic value information for transferring electronic value information between terminals, the method comprising the steps of: authenticating each other between a transmission source terminal being a transmission source of the electronic value information and a transmission destination terminal being a transmission destination using common authentication information; sharing authentication for sharing common information obtained by the authentication between the transmission source terminal and the transmission destination terminal; encrypting data including the electronic value information to be transmitted from the transmission source terminal to the authenticated transmission destination terminal; transferring value information for transmitting the electronic value information encrypted in the step of encrypting to the transmission destination terminal when the transmission source terminal and the transmission destination terminal are recognized with each other in the step of authenticating; temporarily invalidating the electronic value information left in the transmission source terminal; transmitting reception confirmation for returning reception confirmation to the transmission source terminal when the transmission destination terminal completes reception of the electronic value information; deleting value information for deleting the invalidated electronic value information left in the transmission source terminal when the transmission source terminal receives the reception confirmation; transmitting validation information to the transmission destination terminal after the deletion of the electronic value information in order to validate the electronic value information; and validating value information for receiving the validation information and validating the electronic value information by the transmission destination terminal.