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Authentication system, authentication method, authentication apparatus, and authentication method therefor

  • US 20020032858A1
  • Filed: 04/30/2001
  • Published: 03/14/2002
  • Est. Priority Date: 04/28/2000
  • Status: Active Grant
First Claim
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1. A user authentication system, comprising:

  • a data holding medium for holding a common key unique to a user, used in a common-key encryption method;

    an authentication apparatus for holding the common key used in the common-key encryption method and a private key used in a public-key encryption method, each unique to the user; and

    an information processing apparatus connected to the authentication apparatus in an always-communicable manner and provided with a function for performing authentication by the public-key encryption method;

    wherein the authentication apparatus performs authentication by using the common key held by the data holding medium and the common key held by the authentication apparatus, in response to a user authentication request sent from the information processing apparatus, and, only when the user has been authenticated, performs processing for making the information processing apparatus authenticate the user by using the private key corresponding to the user.

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