| 摘要 |
PROBLEM TO BE SOLVED: To provide a signature generation device, a signature verification device and a signature generation aiding device for allowing a customer to perform a temporary signature in a store, and after checking the contents of a contract to be signed, allowing the customer to perform a formal electronic signature. SOLUTION: The signature generation device having a communication means for transmitting/receiving information for performing a signature by an electronic signature in the signature verification device is provided with a storage means for storing secret key information to be the information for performing the signature and an arithmetic means for computing temporary signature information to be information for temporarily signing a message by using the secret key information stored in the storage means and a message to be information concerned with the contents of a document received from the signature verification device by the communication means to perform the electronic signature and conversion data to be information for converting the temporary signature into a signature and characterized by transmitting the temporary signature information to the signature verification device by the communication means, then transmitting conversion data to the signature verification device and performing the signature by the electronic signature. |
