Digital measurement apparatus and image measurement apparatus
AssigneeRicoh Company, Ltd.
InventorsYoichi Kanai, Masuyoshi Yachida
Life of this patent
Estimating the term…
Abstract
A digital measurement apparatus measures a physical measurement object, provides a digital signature of public-key cryptography to measured data of a thus-measured physical quantity, and manages the measured data. The apparatus generates at least a pair of a public key and a private key, to be used for the digital signature of the public-key cryptography, through a key generating algorithm.
Claims28
A digital measurement apparatus, which measures a physical measurement object to produce measured data, provides a public-key cryptography digital signature for the measured data, and manages the measured data, said apparatus comprising:
- key generating means for generating at least a pair of a public key and a private key using a key generating algorithm;
- and
- signature providing means for providing the public-key cryptography digital signature using said public key and said private key.
An image measurement apparatus, which provides a public-key cryptography digital signature for a measured image data, said apparatus comprising:
- a private key;
- image appurtenant information, a portion of which includes a characteristic quantity of the measured image data;
- a signature calculating unit configured to calculate the public-key cryptography digital signature from the portion of the image appurtenant information using the private key;
- a signature adding unit configured to add the calculated public-key cryptography digital signature to the image appurtenant information in the image-data format using a key generating algorithm;
- and
- signature providing means for providing the public-key cryptography digital signature using said public key and said private key.
A digital measurement apparatus, which measures a physical measurement object to produce measured data, provides a public-key cryptography digital signature for the measured data, and manages the measured data, said apparatus comprising:
- a key generating unit configured to generate at least a pair of a public key and a private key using a key generating algorithm;
- and
- a signature providing unit configured to provide the public-key cryptography digital signature using said public key and said private key.
An image measurement apparatus, which provides a public-key cryptography digital signature for a measured image data, said apparatus comprising:
- a private key;
- image appurtenant information, a portion of which includes a characteristic quantity of the measured image data;
- a signature calculating unit configured to calculate the public-key cryptography digital signature from the portion of the image appurtenant information using the private key;
- a signature adding unit configured to add the calculated public-key cryptography digital signature to the image appurtenant information in the image-data format using a key generating algorithm;
- and
- a signature providing unit configured to provide the public-key cryptography digital signature using said public key and said private key.
Dependencies are inferred from the claim text.