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Integrated circuit devices with steganographic authentication, and steganographic authentication methods

  • US 6,779,112 B1
  • Filed: 11/05/1999
  • Issued: 08/17/2004
  • Est. Priority Date: 11/05/1999
  • Status: Expired due to Term
First Claim
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1. A smart card authentication method comprising:

  • selecting a set of defined commands each of which has an inherent function that is not associated with authentication;

    transmitting the selected set of defined commands between a smart card and a receiving/sending unit;

    receiving the transmitted commands; and

    authenticating at least one of the smart card and the receiving/sending unit using the transmitted set of defined commands.

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