PASSWORD AUTHENTICATION DEVICE, PASSWORD AUTHENTICATION METHOD, AND PASSWORD AUTHENTICATION PROGRAM

摘要

In the present invention, a policy storage unit (105) stores a plurality of password policies which describe requirements for certifying a password to be used in authentication of a user, and with which a password can be certified as a correct password if the password conforms to at least one password policy among the plurality of password policies. A policy extraction unit (100) extracts one or more password policies from the plurality of password policies. An authentication information acquisition unit (101) acquires authentication information including a password. A conformance determination unit (102) determines whether or not the password included in the authentication information conforms to at least one password policy among the one or more password policies. An authentication information registration unit (103) registers the authentication information as registration information if the conformance determination unit (102) has determined that the password conforms to at least one password policy.