AUTHENTICATION SYSTEM, AUTHENTICATION APPARATUS, AUTHENTICATION METHOD AND AUTHENTICATION PROGRAM

摘要

An authentication system is provided. The authentication system includes: a storage section that stores association information where a plurality of instructions for individual data is associated with authentication methods which are to be used to authenticate a user (the individual data is previously allocated to a legitimate user individually); a selection section that selects, based on the association information, the authentication method corresponding to the instruction input by a user; and an authentication section that follows the authentication method selected to authenticate the user as the legitimate user based on a result of checking challenge data obtained from the user for the check against template data previously registered as authentication information for the legitimate user.