Patent ID: 9130973
Filing Date: 2015-09-08
Classification: G06F,H04L

Abstract:
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.