| 摘要 |
<P>PROBLEM TO BE SOLVED: To attain an authentication system which makes a one-time password generation means portable and does not burden a user. <P>SOLUTION: In the system which authenticates a terminal 10 communicably connected with an IC card 50, time information acquired from the terminal 10 by the IC card 50 is decrypted and encrypted by pregiven keys A, B, respectively, and an operation result α is transmitted to the terminal 10 as a response. The terminal 10 transmits the operation result α to an authentication server 40 as authentication data together with a user ID and the time information. In the authentication server 40 the authentication data including the user ID, operation result α, the time information are received, the time information is decrypted and encrypted by using the keys A, B in the authentication server 40, respectively. Then, the encryption processed time information is collated with the operation result α transmitted by the terminal 10 and when this collation result matches, connection between the terminal 10 and the authentication server 40 is permitted. <P>COPYRIGHT: (C)2008,JPO&INPIT |
