STORAGE MEDIUM FOR HISTORY MANAGEMENT, AND IC CARD

摘要

PROBLEM TO BE SOLVED: To prevent a manager from altering a history. SOLUTION: The purport that history data are not altered and the consecution of the individual pieces of the history data are guaranteed because an authenticator C is attached to the operation history of the manager in each piece of the history data. The purport that the latest history data are not eliminated is also guaranteed because the comparison results of the latest authenticator C are also verified.