A computer-readable medium storing a program, which when executed by a computer, causes the computer to execute a method for authentication of an individual based on his or her physical feature, the method comprising:
- applying a predetermined processing to a physical feature of a target individual for authentication determination;
- directly detecting the physical feature to which the predetermined processing is applied so as to acquire authentication information for authentication determination;
- acquiring the previously registered information related to a state in which the predetermined processing has been applied to a physical feature of an individual as registration information for authentication;
- and
- determining authentication of the authentication information acquired based on the acquired registration information.