| 摘要 |
<p>An authentication system by which character strings in squares are selected by a rule fixed by a user out of a table in which character strings are assigned to squares, and the selected character strings are arranged to obtain a one-time password. The user memorizes a rule of successively selecting three out of the positions of the squares in the table of such as five rows and five columns. To each square (402) in the table (401) to be presented to the user, a two-digit number generated randomly is assigned. The table (401) is presented to the user, who arranges the numbers in the squares (402) on the basis of the user's own rule to generate a six-digit numbers and makes them authenticated as the one-time password. Therefore, the rule of obtaining one-time password is easy for the user to memorize and a long one-time password can be obtained.</p> |
