Message authorization system for authorizing message for electronic document
First Claim
1. A message authorization system for conducting message authorization of an electronic document comprising:
- a sender sub-system that adds authorization data and sends the electronic document; and
a verifier sub-system that ascertains a validity of the authorization data,wherein said sender sub-system and said verifier sub-system each having an inherent secret key and an inherent public key corresponding to the secret key,said sender sub-system including authorization data producing means for producing said authorization data dependent on the public key of said verifier sub-system and the secret key of said sender sub-system, andsaid verifier sub-system including data verifying means for verifying said authorization data received from said sender sub-system based on the public key of said sender sub-system.
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Accused Products
Abstract
A message authorization system in which a sender sub-system and a verifier sub-system each have inherent secret information and inherent public information set corresponding to the secret information, the sender sub-system including an authorization data producing unit for producing authorization data dependent on the public information of the verifier sub-system and the secret information of the sender sub-system, and the verifier sub-system including a data verification unit for verifying authorization data received jointly with an electronic document from the sender sub-system based on the public information of the sender sub-system.
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Citations
14 Claims
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1. A message authorization system for conducting message authorization of an electronic document comprising:
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a sender sub-system that adds authorization data and sends the electronic document; and a verifier sub-system that ascertains a validity of the authorization data, wherein said sender sub-system and said verifier sub-system each having an inherent secret key and an inherent public key corresponding to the secret key, said sender sub-system including authorization data producing means for producing said authorization data dependent on the public key of said verifier sub-system and the secret key of said sender sub-system, and said verifier sub-system including data verifying means for verifying said authorization data received from said sender sub-system based on the public key of said sender sub-system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A message authorization system for implementing signing by adding signature data to an electronic document comprising:
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a sender sub-system for adding the signature data and sending the electronic document; and a verifier sub-system that verifies the signature data, wherein said sender sub-system and said verifier sub-system each having an inherent secret key and an inherent public key corresponding to the secret key, said sender sub-system comprising; signature data producing means for producing signature data dependent on the secret key of said sender, and verification data producing means for producing said verification data dependent on the public key of said verifier sub-system and the secret key of said sender sub-system, and said verifier sub-system comprising; data verifying means for verifying said signature data applied to said electronic document based on said verification data received from said sender sub-system and the public key of said sender sub-system. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification