| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an authentication system preventing illegal acquisition of information. <P>SOLUTION: When an authentication device communication part 51 receives authentication information and shared information from a user terminal 3, an authentication processing part 53 determines whether the authentication information is legitimate or not. If the authentication information is legitimate, the authentication processing part 53 stores the shared information in an authentication data storage part 52. When the authentication device communication part 51 receives shared information from a pen type authentication device 1, the authentication processing part 53 confirms whether the shared information same as the shared information is stored in the authentication data storage part 52, and authenticates the user terminal 3 as a legitimate user terminal if the shared information same as the shared information is stored in the authentication data storage part 52. <P>COPYRIGHT: (C)2008,JPO&INPIT |
