Message authorization system for authorizing message for electronic document
AssigneeNEC Corporation
InventorKazue Sako
Life of this patent
Estimating the term…
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.
Claims14
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, 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.
A message authorization system for implementing signing by adding signature data to an electronic document comprising:
- 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.
Dependencies are inferred from the claim text.