| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To ensure high-level security by preventing leakage of authentication information without using a special device for authentication while reducing a user's burden. <P>SOLUTION: An authentication request is transmitted to an authentication server device 20 by photographing an image displayed on a terminal device 30 by a mobile communication device 10, and a use qualification confirmation request is transmitted from the server device 20 to a providing server device 40. Thus, the leakage of the authentication information can be prevented without using a special device for authentication while reducing the user's burden. Thereafter, the providing server 40 performs determination for use qualification by use of a mobile phone number 6 and terminal identification information 1, and the authentication server device 20 performs validity determination based on whether time information is within a predetermined time from an issuing time. Namely, the authentication is performed within the predetermined time by use of the mobile communication device 10 carried by the user and the terminal device 30 operated by the user, thereby an unauthorized use such as impersonation by a stolen mobile communication terminal is made difficult, and high-level security can be ensured. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
