Password authentication apparatus, password authentication method, and non-temporary computer-readable recording medium storing password authentication program

摘要

The control unit has a plurality of format display areas in which a plurality of predetermined formats are randomly and uniquely assigned to the screen of the display unit in a random layout with a layout similar to that of a plurality of input keys capable of inputting numerical values. Display. The control unit determines the shortest path that follows the form series that is the user's password in the form random arrangement, and all the form series existing on the shortest path are assigned to the plurality of input buttons and the plurality of form display areas. According to the correspondence, a one-time password is generated by substituting a series of codes assigned to a plurality of input buttons. Then, the control unit performs authentication by comparing the one-time password with a series of codes input by the user using the input unit. [Selection] Figure 6A