| 摘要 |
PROBLEM TO BE SOLVED: To enable a normal user to detect an illegal access to an online system and devise a preventing measure by changing a set password code or the like. SOLUTION: Set password codes PASS (1) to PASS (R) are specified for a user name inputted from a terminal 110 and the set password code PASS (1) is compared with an inputted password code 'pass' at first. When both the password codes coincide with each other, an access is permitted, but in the case of nob-coincidence, a noncoincidence counter 1031 is counted up. Even when a coincident password code 'pass' is inputted thereafter, an access is not permitted and similar collation for a succeeding set password code PASS(2) is executed. When the set password code PASS(2) coincides with a password code 'pass' inputted at first, the count value of the counter 103. in the case of the code PASS (1) is displayed, its change is requested and then an access is permitted. When an illegal access is generated, a change request for the set password code is outputted without fail. |
