LEGITIMACY CONFIRMATION SYSTEM, LEGITIMACY CONFIRMING METHOD, INFORMATION PROCESSING CARD, CONFIRMING DEVICE AND AUTHENTICATION DEVICE

摘要

[PROBLEMS TO BE SOLVED] Even in the case a user mistakenly inputs authentication information to a counterfeit authentication system, the authentication information is certainly prevented from leaking out. [MEANS FOR SOLVING PROBLEMS] A legitimacy confirming system is provided with an information processing card, an authentication system for carrying out a mutual authentication with the information processing card and a confirming device. The information processing card is comprised of a legitimacy authenticating means for authenticating the legitimacy of the authentication system, and a masquerade prevention means for carrying out a masquerade prevention processing for a result authenticated by the legitimacy authenticating means. The confirming device is comprised of a verifying means for verifying a result of an authentication that is output from the information processing card and that is subjected to the masquerade prevention processing, and a verified result output means for outputting the result verified by the verifying means in a user perceivable state. The verifying means is not provided in the confirming device but may be alternatively provided in the verifying device.