CONTACTLESS SMARTCARD AUTHENTICATION
First Claim
1. A method of contactless smartcard authentication, comprising:
- detecting the presence of a contactless smartcard at a card reader;
measuring an impulse response of the card reader to the presence of the contactless smartcard; and
authenticating the contactless smartcard based on the measured impulse response of the card reader.
3 Assignments
0 Petitions
Accused Products
Abstract
Techniques for authenticating a contactless smartcard in a card processing system are disclosed. A card reader measures an impulse response associated with the contactless smartcard during outbound modulation of an RF carrier and compares measured impulse data to reference impulse data. The reference impulse data can be stored at the card reader or obtained from the contactless smartcard in an encrypted form. Optionally, the card reader issues one or more challenges to the contactless smartcard in connection with a card transaction and verifies a response to the one or more challenges using calibration data. The card reader can determine the card'"'"'s authenticity based on the impulse data, the response to one or more challenges, or a combination thereof.
50 Citations
29 Claims
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1. A method of contactless smartcard authentication, comprising:
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detecting the presence of a contactless smartcard at a card reader; measuring an impulse response of the card reader to the presence of the contactless smartcard; and authenticating the contactless smartcard based on the measured impulse response of the card reader. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A card reader, comprising:
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a transmitter configured to modulate an RF carrier with a transmit data signal for communicating with a contactless smartcard; a receiver configured to detect receive data corresponding to a modulation of the RF carrier by the contactless smartcard; a processor configured to vary the transmit data signal in relation to standards of a communication protocol of the contactless smartcard in one or more challenges; and a memory configured to store calibration data relating to operating characteristics of the contactless smartcard, wherein the processor is configured to authenticate the contactless smartcard based on the calibration data and receive data associated with the one or more challenges. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of contactless smartcard authentication, comprising:
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detecting a contactless smartcard at a card reader; obtaining an identifier of the contactless smartcard; determining one or more challenges for the contactless smartcard based on the identifier; varying a transmit signal in relation to standards of a communication protocol of the contactless smartcard to issue the one or more challenges; determining at the card reader a response of the contactless smartcard to the one or more challenges; and authenticating the contactless smartcard at the card reader based on the response to the one or more challenges.
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25. A contactless smartcard, comprising:
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an antenna configured to detect modulation of an RF carrier at an operating frequency of the contactless smartcard; an integrated circuit configured to modulate the RF carrier according to a contactless smartcard communication (CSC) protocol; and a storage accessible to the integrated circuit and configured to hold calibration data relating to operating characteristics of the contactless smartcard, wherein the integrated circuit is configured to send the calibration data by modulating the RF carrier in response to a card reader command. - View Dependent Claims (26, 27, 28, 29)
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Specification