| 摘要 |
PROBLEM TO BE SOLVED: To solve the difficulty that a cipher code cannot be prevented from being illegally reused when the cipher code is stolen because the cipher code is fixed in a conventional cipher code collation system in person confirming processing for using a computer system. SOLUTION: An equation designed personally by a user is registered as a cipher, and cipher verification numbers satisfying the equation are inputted at the time of person confirming processing so that person confirmation can be realized. Also, random numbers are used as the variables of the equation, and the cipher verification numbers to be inputted are designed so as to be changed each time so that the cipher verification numbers can be prevented from being reused even when the cipher verification numbers are stolen. Also, the cipher verification numbers which can not be reused are printed on a slip so that whether or not the person confirmation is legally realized can be easily verified in the transaction. Also, targeted cipher equations for facilitating countermeasures to any threat or illegal use or the like are registered, and the cipher verification numbers satisfying those equations are inputted so that it is possible to facilitate countermeasures to any threat or illegal use. |
