Patent ID: 7107247

Claim:
An electronic value system for performing transmission and reception of an electronic value which comprises electronic money information between a first communication terminal and a second communication terminal, said first communication terminal comprising: a first memory for storing an electronic value, identification information of an issuer of said electronic value, and a digital signature provided by said issuer to said identification information; and a first transmission means for transmitting said identification information and said digital signature together with said electronic value to said second communication terminal; a first receiving means for receiving from said second communication terminal identification information of an issuer and a digital signature before transmitting said electronic value to said second communication terminal; and a first confirmation means for confirming authenticity of said second communication terminal by checking said digital signature received from said second communication terminal to determine that said electronic value has been issued by said issuer, said second communication terminal comprising: a second memory for storing an electronic value, identification information of an issuer of said electronic value, and a digital signature provided by said issuer to said identification information; a second transmission means for transmitting said identification information and said digital signature that are stored in said second memory to said first communication terminal; a second receiving means for receiving identification information of an issuer and a digital signature from said first communication terminal; and a confirmation means for confirming that said electronic value has been issued by the issuer.