TERMINAL AUTHENTICATION SYSTEM, SERVER AND TERMINAL AUTHENTICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a terminal authentication system capable of improving the accuracy of authentication of client terminal.SOLUTION: In the terminal authentication system, a client terminal transmits a first piece of information based on a piece of confidential information which is different from each other depending on client terminal and a client certificate including a hash code of the confidential information derived from confidential information to a server. The server receives the first information and the client certificate, derives the hash code from the confidential information based on the first information by using a unidirectional function and authenticates the client terminal on the basis of the derived hash code and the hash code of the confidential information included in the client certificate.