Image sensor, image pickup apparatus, image sensor-identifying method, image forgery-preventing method, and image alternation-limiting method
To provide an image sensor capable of guaranteeing consistency between acquired image information and picked-up image information. An image sensor 30 includes an image information processing unit 4 that forms integrated information in which image sensor identification information capable of identifying the image sensor 30 and image information obtained by an analog/digital conversion unit 25 are associated with each other, and an image information output unit 24 that outputs the integrated information to an external unit.
1. An image sensor, comprising:
an image information processing unit configured to generate integrated information in which image sensor identification information for identification of the image sensor and first image information obtained by an analog/digital conversion unit are associated with each other, wherein
the integrated information is electronic signature information obtained by encryption of at least one of the image sensor identification information or the first image information, and
the electronic signature information is encrypted based on a public-key method; and
an image information output unit configured to output the integrated information to an external unit.
2. The image sensor according to claim 1 , wherein the image information output unit is further configured to output the electronic signature information is output to the external unit via an interface unit.
3. The image sensor according to claim 1 , wherein the electronic signature information includes an image pickup condition.
4. The image sensor according to claim 1 , wherein
the image information processing unit is further configured to calculate a hash value based on the first image information, and
the electronic signature information is obtained based on encryption of the hash value.
5. The image sensor according to claim 1 , wherein the image information output unit is further configured to output the electronic signature information such that the electronic signature information is displayed in part of the first image information.
6. The image sensor according to claim 1 , wherein the electronic signature information includes connected-apparatus information associated with a connection of an apparatus to the image sensor.
7. The image sensor according to claim 1 , wherein the electronic signature information is encrypted further based on a secret key.
8. The image sensor according to claim 1 , wherein the electronic signature information further includes information generated based on second image information after output of the first image information to the external unit.
9. The image sensor according to claim 8 , wherein the electronic signature information generated in a case where a degree of similarity between the first image information and the second image information satisfies at least a condition.
10. The image sensor according to claim 1 , further comprising a three-layer stacking structure having a configuration in which a signal processing substrate that includes the image information processing unit wherein the signal processing substrate is between a pixel substrate and a memory substrate.
11. An image pickup apparatus, at least comprising:
an image sensor that comprises:
an image information processing unit configured to generate integrated information in which image sensor identification information for identification of the image sensor and image information obtained by an analog/digital conversion unit are associated with each other, wherein
the integrated information is electronic signature information obtained by encryption of at least one of the image sensor identification information or the image information, and
the electronic signature information is encrypted based on a public-key method; and
an image information output unit configured to output the integrated information to an external unit.
12. An image sensor-identifying method, comprising:
identifying an image sensor based on analysis of integrated information in which image sensor identification information for identification of the image sensor and image information obtained by an analog/digital conversion unit are associated with each other, wherein
the integrated information is electronic signature information obtained by encryption of at least one of the image sensor identification information or the image information, and
the electronic signature information is encrypted based on a public-key method; and
outputting the integrated information from the image sensor to an external unit.
13. An image forgery-preventing method, comprising:
preventing forgery of image information based on electronic signature information in which image sensor identification information for identification of an image sensor and image information obtained by an analog/digital conversion unit are associated with each other, wherein
the electronic signature information is obtained by encryption of at least one of the image sensor identification information or the image information, and
the electronic signature information is encrypted based on a public-key method; and
outputting the electronic signature information from the image sensor to an external unit.
14. An image alternation-limiting method, comprising:
performing decryption processing on image information for an image alteration privilege to decrypted image information, wherein
the image information includes electronic signature information in which image sensor identification information for identification of an image sensor and the image information obtained by an analog/digital conversion unit are associated with each other,
the electronic signature information obtained by encryption of at least one of the image sensor identification information or the image information, and
the electronic signature information is encrypted based on a public-key method; and
outputting the image information from the image sensor to an external unit.