| 摘要 |
PROBLEM TO BE SOLVED: To reduce the risk of an attack to an algorithm itself for detecting the alternation of a program.SOLUTION: In an authentication system including an authentication terminal and an authentication result use server, the authentication terminal is configured to transmit the authentication result of the user of the authentication terminal to the authentication result use server, and the authentication result use server is configured to, when receiving the authentication result, generate and transmit designation address information to the authentication terminal, and the authentication terminal is configured to, when receiving the designation address information, generate and transmit a hash value about the alteration detection target program to the authentication result use server on the basis of the designation address information, and the authentication result use server is configured to, when receiving the hash value, determine that the alternation detection target program has not been altered when the hash value matches a hash value about the duplication of the alternation detection target program generated on the basis of the designation address information, and to determine that the alteration detection target program has been altered when those hash values do not match.SELECTED DRAWING: Figure 1 |
