| 摘要 |
PROBLEM TO BE SOLVED: To provide an authentication device capable of performing a correct user authentication only to a legitimate user even when a user account and a password are leaked. SOLUTION: A authentication system 104 newly generates a corresponding password by a password generation means 105c and transmits the generated password to a user access device 103 based on contact adress information corresponding to the user account when change instructions of the user account and the corresponding password are received and when it is determined that the received user account is stored. COPYRIGHT: (C)2007,JPO&INPIT |
