Patent ID: 9158937
Filing Date: 2015-10-13
Classification: G06F,H04L

Abstract:
1. An information processing device which manages the protection state of original data by long-term signature data in storage-target data obtained by combining the long-term signature data and the original data, the information processing device comprising: a management information acquisition circuit for acquiring management information having a management-target value for each management item obtained from the storage-target data recorded therein; a management-target value acquisition circuit for acquiring a management-target value of a predetermined management item from the acquired management information; a determination circuit for comparing the acquired management-target value with a value acquired from the storage-target data or a value acquired from the outside to determine the state of management; and an output circuit for outputting a result corresponding to the determined state of management; wherein one of the obtained management items corresponds to the determination of non-destruction of the storage-target data; wherein the management-target value acquisition circuit acquires hash value of the storage-target data from the management information as a management-target value when it is confirmed that the storage-target data is not destructed; wherein the determination circuit computes the hash value of the storage-target data and compares the hash value of the storage-target data with the acquired hash value to determine non-destruction of the stored-target data; wherein another of the acquired management items is the determination of the validity of the long-term signature data; wherein the management-target value acquisition circuit acquires specification information for specifying an archive time stamp to be used by the long-term signature data and source information of expiration information of the archive time stamp from the management information as a management-target value; and wherein the determination circuit acquires the expiration information using the acquired source information and compares the acquired expiration information with the acquired specification information to determine the validity of the long-term signature data.