Long-term signature terminal, long-term signature server, long-term signature terminal program, and long-term signature server program

摘要

A long-term signature terminal acquires storage-target data and electronic signature data corresponding to the acquired storage-target data. The acquired electronic signature data is transmitted to a server, and electronic signature data having a time stamp applied thereto is received from the server. The received electronic signature data with the applied time stamp is combined with the acquired storage-target data to generate signed data. Verification information for verifying the validity of the electronic signature data having the time stamp is received from the server and applied to the signed data to generate first long-term signature data. Confirmation data for confirming unfalsification of the generated long-term signature data is generated and transmitted to the server, and the confirmation data having a time stamp applied thereto is received from the server. The received confirmation data with the time stamp is applied to the first long-term signature data to generate second long-term signature data.

主权项

1. A long-term signature terminal comprising:
a storage-target data acquisition circuit for acquiring storage-target data; an electronic signature data acquisition circuit for acquiring electronic signature data of the acquired storage-target data; an electronic signature data reception circuit for transmitting the acquired electronic signature data to a predetermined server and receiving electronic signature data having a time stamp applied thereto from the predetermined server; a signed data generation circuit for combining the received electronic signature data having the time stamp applied thereto with the acquired storage-target data to generate signed data; a long-term signature data generation circuit for receiving verification information for verifying the validity of the electronic signature data having the time stamp applied thereto from a predetermined server, applying the verification information to the signed data, and generating first long-term signature data; a confirmation data reception circuit for generating confirmation data for confirming unfalsification of the generated long-term signature data, transmitting the confirmation data to a predetermined server, and receiving the confirmation data having a time stamp applied thereto from the predetermined server; and a long-term signature data generation circuit for applying the received confirmation data having the time stamp applied thereto to the first long-term signature data to generate second long-term signature data; wherein at least two of the electronic signature data reception circuit, the long-term signature data generation circuit, and the confirmation data reception circuit perform communication with the same server.