| 摘要 |
<p>Provided are an authentication device, an authentication method, and a program to execute the same by a computer by which reading by other people is made difficult when authentication is performed by selecting a correct image for authentication from displayed images, and security can be improved. A main control unit (12) randomly selects at least one and at most a number displayable on a display unit (14) of correct images (23) to be displayed, from a correct image DB (17), and stores the selected images in a display correct image storage unit (19). Dummy images are selected in a number displayable on the display unit (14), from a dummy image DB (18). The main control unit (12) displays the selected display images in a list on the display unit (14). The main control unit (12) changes display numbers and display arrangements of the correct images and the dummy images to be different from those for the prior authentication. When a user selects the correct image, the authentication control unit (13) compares the correct images (23) registered in the display correct image storage unit (19) with the image selected by the user, and if there is a match, completes the authentication.</p> |
