| 摘要 |
PROBLEM TO BE SOLVED: To provide an authentication server capable of improving safety performance relevant to user authentication.SOLUTION: An authentication server 10 executes a series of processing, including: while referring to a storage section which stores, for each user, a piece of visual information of any of characters, symbols or a pictorial figure, and a display position of the visual information on a display screen, displaying the visual information corresponding to a user of a terminal at a display position corresponding to the user of the terminal on the display screen; acquiring a piece of time series information of the position of an object which moves on the display screen displaying the visual information on the display position; and authenticating the user based on the time series information of the acquired position.SELECTED DRAWING: Figure 2 |
