Signature apparatus, signature method, verification apparatus, verification method, and non-transitory computer-readable storage medium
AssigneeCanon Kabushiki Kaisha
InventorYasuhiro Nakamoto
Life of this patent
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Abstract
A first signature key that is a signature key assigned to a user is used to generate, as first signature data, signature data of an input image. A second signature key that is a signature key assigned to the signature apparatus is used to generate, as second signature data, signature data of data that includes the input image and the first signature data. Coupled data that includes the first signature data, the second signature data, and the input image is outputted.
Claims14
A signature apparatus, comprising:
- a first generation unit configured to use a first signature key that is a signature key assigned to a user to generate, as first signature data, signature data of an input image;
- a second generation unit configured to use a second signature key that is a signature key assigned to the signature apparatus to generate, as second signature data, signature data of data that includes the input image and the first signature data;
- and
- an output unit configured to output coupled data that includes the first signature data, the second signature data, and the input image.
A verification apparatus, comprising:
- an acquisition unit configured to acquire first signature data of an input image generated by using a signature key assigned to a user, and second signature data of data that includes the input image and the first signature data and is generated by using a signature key assigned to a signature apparatus;
- and
- a determination unit configured to determine success or failure of authentication of a user of the signature apparatus in accordance with a signature source corresponding to the second signature data and a signature source corresponding to the first signature data.
A signature method, comprising:
- using a first signature key that is a signature key assigned to a user to generate, as first signature data, signature data of an input image;
- using a second signature key that is a signature key assigned to the signature apparatus to generate, as second signature data, signature data of data that includes the input image and the first signature data;
- and
- outputting coupled data that includes the first signature data, the second signature data, and the input image.
A verification method, comprising:
- acquiring first signature data of an input image generated by using a signature key assigned to a user, and second signature data of data that includes the input image and the first signature data and is generated by using a signature key assigned to a signature apparatus;
- and
- determining success or failure of authentication of a user of the signature apparatus in accordance with a signature source corresponding to the second signature data and a signature source corresponding to the first signature data.
A non-transitory computer-readable storage medium storing a computer program for causing a computer of a signature apparatus to function as
- a first generation unit configured to use a first signature key that is a signature key assigned to a user to generate, as first signature data, signature data of an input image;
- a second generation unit configured to use a second signature key that is a signature key assigned to the signature apparatus to generate, as second signature data, signature data of data that includes the input image and the first signature data;
- and
- an output unit configured to output coupled data that includes the first signature data, the second signature data, and the input image.
A non-transitory computer-readable storage medium storing a computer program for causing a computer of a verification apparatus to function as an acquisition unit configured to acquire first signature data of an input image generated by using a signature key assigned to a user, and second signature data of data that includes the input image and the first signature data and is generated by using a signature key assigned to a signature apparatus;
- and
- a determination unit configured to determine success or failure of authentication of a user of the signature apparatus in accordance with a signature source corresponding to the second signature data and a signature source corresponding to the first signature data.
Dependencies are inferred from the claim text.