SOLID-STATE IMAGING DEVICE AND INFORMATION PROCESSING DEVICE

• US 20200137335A1
• Filed: 04/24/2018
• Published: 04/30/2020
• Est. Priority Date: 07/11/2017
• Status: Active Grant

• Current Assignee: Sony Semiconductor Solutions Corporation (Sony Group Corp.)
• Original Assignee: Sony Semiconductor Solutions Corporation (Sony Group Corp.)
• Inventors: OHDAIRA, ISAO
• Granted Patent: US 11,032,503 B2
• Time in Patent Office: Days
• CPC Class Codes: G09C 1/00 Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system cryptographic typewriters G09C3/00
• CPC Class Codes: H04L 9/0866 involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics
• CPC Class Codes: H04L 9/0869 involving random numbers or seeds
• CPC Class Codes: H04L 9/3247 involving digital signatures
• CPC Class Codes: H04N 25/76 Addressed sensors, e.g. MOS or CMOS sensors
• CPC Class Codes: H04N 25/79 Arrangements of circuitry being divided between different or multiple substrates, chips or circuit boards, e.g. stacked image sensors

Abstract

A seed value of a random number is generated in a more preferable manner by utilizing characteristics of a solid-state imaging device. A solid-state imaging device includes a pixel array unit in which a plurality of pixels is arrayed, and a processing unit that generates a seed value of a random number on the basis of each pixel value of predetermined one or more target pixels of the plurality of pixels, in which the pixel array unit is arranged on a first substrate, the processing unit is arranged on a second substrate, and a plurality of substrates including at least the first substrate and the second substrate is stacked so that the second substrate is located in a lower layer than the first substrate.

Claims

1. A solid-state imaging device comprising:

a pixel array unit in which a plurality of pixels is arrayed; and

a processing unit that generates a seed value of a random number on a basis of each pixel value of predetermined one or more target pixels of the plurality of pixels,

wherein the pixel array unit is arranged on a first substrate,

the processing unit is arranged on a second substrate, and

a plurality of substrates including at least the first substrate and the second substrate is stacked so that the second substrate is located in a lower layer than the first substrate.

2. The solid-state imaging device according to claim 1,

wherein the processing unit

inputs the pixel value of the target pixel as input data to a register having a bit length by a second bit number larger than a first bit number corresponding to a depth of bit of the pixel value to calculate a register value for each of the one or more target pixels, and

generates the seed value on a basis of the register value calculated for each of the one or more target pixels.

3. The solid-state imaging device according to claim 2, wherein the processing unit shifts, in the register, the input data input to the register by a third bit number corresponding to a pixel position of the target pixel corresponding to the input data to calculate the register value.

4. The solid-state imaging device according to claim 3, wherein the processing unit cyclically shifts, in the register, the input data input to the register to calculate the register value.

5. The solid-state imaging device according to claim 3, wherein the processing unit inverts an order of each bit of the input data to calculate the register value, in a case where at least some bits of the input data after the shift are included in a predetermined range in the register.

6. The solid-state imaging device according to claim 2, wherein the processing unit generates the seed value by adding the register value calculated for each of the one or more target pixels.

7. The solid-state imaging device according to claim 1, wherein the processing unit generates a random number on a basis of the seed value generated.

8. The solid-state imaging device according to claim 7, wherein the processing unit generates an electronic signature on a basis of the random number generated.

9. An information processing device comprising:

an acquisition unit that acquires an image signal corresponding to each of predetermined one or more target pixels in a pixel region in which a plurality of pixels is arrayed; and

a processing unit that generates a seed value of a random number on a basis of each pixel value of the one or more target pixels corresponding to the image signal.