| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a security system, an information processing system, a control method of the security system, a control method of the information processing system, a program capable of implementation in system for performing the control method, and a ticket system. <P>SOLUTION: The security system 12 includes: a non-volatile type storing unit 22 for storing correctness inspection unit including a counter, which is renewed every time a signature function means 30 is called; a non-volatile type storing unit 24 for reading a counter array from an outer non-volatile storing unit for storing the counter array, in which a hash value generated for each signature key and a number-of-signature counter for counting the number of signature formed with the signature key are arranged in pairs, and storing the counter array; and a hash function unit 28 for reading the counter array from the non-volatile storing unit 24, generating a hash value, and feeding the hash value to the correctness inspection unit for correctness checking. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
