ONE-TIME ID GENERATING METHOD, AUTHENTICATION METHOD, AUTHENTICATION SYSTEM, SERVER, CLIENT, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a one-time ID generating method whereby theft of the ID is difficult and excellent security is realized, and to provide an authentication method, an authentication system, a server, a client, and a program employing the one-time ID. SOLUTION: In the method for generating the one-time ID, the one-time ID is generated by making identification information usable only once for the authentication between a plurality of apparatuses or applications as the one-time ID. In each of the apparatus or application which performs authentication, a variable shared key changing by each prescribed communication unit requiring authentication is generated, value of a unidirectional function employing the variable shared key for its argument is obtained, and the one-time ID is generated from the value of the function. COPYRIGHT: (C)2005,JPO&NCIPI