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System and method for encrypted smart card PIN entry

  • US 7,735,132 B2
  • Filed: 08/04/2005
  • Issued: 06/08/2010
  • Est. Priority Date: 07/29/2005
  • Status: Active Grant
First Claim
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1. A method for authenticating by a smart card using a user device in wireless communication with a physically separate smart card reader, the smart card comprising a microprocessor and a memory for storing a private key and a public key, the memory comprising secure memory for storing the private key, a decryption algorithm, and predetermined authentication information, the method comprising the steps of:

  • transmitting a challenge from the smart card to the user device via the smart card reader over a wireless communication link, the challenge comprising the public key;

    receiving at the smart card from the user device via the smart card reader over the wireless communication link, a response to the challenge comprising received user-entered authentication information encrypted using the challenge;

    decrypting the received user-entered authentication information using the private key at the smart card;

    comparing the received user-entered authentication information with the predetermined authentication information at the smart card; and

    if the received user-entered authentication information matches the predetermined authentication information, transmitting a verification signal from the smart card to the user device.

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