Authentication system, authentication method, authentication apparatus, and authentication method therefor
First Claim
Patent Images
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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Abstract
An information holding medium stores the common key of the user used in the common-key encryption method. In response to a user authentication request sent from an information processing apparatus, the user is authenticated by the common-key encryption method by using the common key stored in the information holding medium of the user. Only when the user has been authenticated, predetermined processing for making the information processing apparatus authenticate the user by the public-key encryption method is performed.
28 Citations
20 Claims
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1. A user authentication system, comprising:
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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. - View Dependent Claims (2, 3, 4)
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5. A user authentication method for a user who carries a data holding apparatus for holding a common key used in a common-key encryption method, the method comprising the steps of:
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authenticating the user by the common-key encryption method by using the common key held by the data holding apparatus of the user in response to a user authentication request; and
performing, only when the user has been authenticated, processing for authenticating the user by a public-key encryption method. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 18, 19, 20)
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13. An authentication method, comprising the steps of:
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holding a common key used in a common-key encryption method and a private key used in a public-key encryption method, for each user;
authenticating, in response to a user authentication request sent from an external information processing apparatus, the user by using the held common key for the user and a common key used in the common-key encryption method which the user has and is held by a data holding apparatus; and
performing, only when the user has been authenticated in the authentication step, processing for making the information processing apparatus authenticate the user by the public-key encryption method by using the private key corresponding to the user.
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14. An authentication apparatus, comprising:
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a holder for holding a common key used in a common-key encryption method and a public key used in a public-key encryption method, for each user; and
an authenticating device for, in response to a user authentication request sent from an external information processing apparatus, authenticating the user by using the common key for the user held by the holder and a common key used in the common-key encryption method for the user held by a data holding medium of the user, and for, only when the user has been authenticated, performing processing for making the information processing apparatus authenticate the user by the public-key encryption method by using the private key corresponding to the user.
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Specification