PASSWORD AUTHENTICATION METHOD AND PASSWORD AUTHENTICATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an authentication method capable of eliminating an illicit authentication while ensuring the convenience of users. SOLUTION: This password authentication system for a password authentication system for requesting a password input again in the input of a wrong password comprises a step in which the password authentication system requests the password group input of the frequency according to an input request number K set to a number of 1 or more for authentication; a step in which the password authentication system requests the password group input of the frequency according to the input request number K again for authentication when the wrong password is included in the inputted password group; and a step in which the password authentication system increases the input request number K when the mistake of password group input is performed in the frequency according to a mistake permitting number Xmax set to a number of 1 or more.