| 摘要 |
The present invention is to enable a user to input authentication information without burden, such that the user only has to memorize part of the authentication information even when inputting lengthy authentication information in order to ensure high-level security. When an operation of inputting and arranging authentication information in an information arrangement region is performed in a state where an arrangement status of a specified portion in the information arrangement region is set in advance as partial-authentication reference information in a reference authentication information memory, a CPU detects an arrangement status of the specified portion from an overall arrangement status in the information arrangement region, and performs, as partial authentication, processing of matching the detected arrangement status of the specified portion and the arrangement status of the specified portion set as the partial-authentication reference information. |
