Ic card including registered biometric information and registered pin information, operation method thereof, and operation method of card reader communicating with ic card

An integrated circuit (IC) card comprising:

• a biometric sensor configured to generate biometric information;
• and
• a control circuit that is configured to store registered biometric information and registered PIN information, wherein the control circuit is further configured to communicate with the biometric sensor and a card reader that are external to the IC card,
• wherein the control circuit is configured to perform operations comprising:
• receiving a biometric verification request from the card reader;
• determining whether the biometric information and the registered biometric information match, based on the biometric verification request;
• outputting a first response indicating a biometric verification fail to the card reader, in response to determining that the biometric information and the registered biometric information do not match;
• receiving a PIN verification request and PIN information from the card reader, responsive to the first response indicating the biometric verification fail;
• determining whether the PIN information and the registered PIN information match, based on the PIN verification request;
• and
• outputting a second response indicating whether the PIN information and the registered PIN information match, to the card reader.

A method of operating a card reader that is configured to communicate with an integrated circuit (IC) card that stores registered biometric information and registered PIN information, the method comprising:

• outputting a biometric verification request to the IC card;
• receiving, from the IC card, a first response indicating a biometric verification fail of the biometric verification request for the registered biometric information;
• outputting a PIN verification request and PIN information to the IC card, based on the first response indicating the biometric verification fail;
• and
• receiving, from the IC card, a second response indicating whether the PIN information and the registered PIN information match.