Imaging device with image encryption
AssigneeSK hynix Inc.
InventorsKen Sawada, Daisuke Shiraishi, Sung Kyu Lee
Life of this patent
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Abstract
An imaging device is provided to include a physical unclonable function (PUF) pixel selection unit configured to identify a first pixel that is designated to generate PUF data and select a second pixel having a color identical to a color of the first pixel, a noise extraction unit coupled to the PUF pixel selection unit to receive information of the first pixel and the second pixel and configured to extract a first noise value of the first pixel and a second noise value of the second pixel, and a PUF data generation unit coupled to the noise extraction unit and configured to generate the PUF data based on the first noise value and the second noise value from the noise extraction unit.
Claims20
An imaging device comprising:
- a physical unclonable function (PUF) pixel selection unit configured to identify a first pixel that is designated to generate PUF data and select a second pixel having a color identical to a color of the first pixel;
- a noise extraction unit coupled to the PUF pixel selection unit to receive information of the first pixel and the second pixel and configured to extract a first noise value of the first pixel and a second noise value of the second pixel;
- and
- a PUF data generation unit coupled to the noise extraction unit and configured to generate the PUF data based on the first noise value and the second noise value from the noise extraction unit.
A method of processing an image signal, comprising:
- selecting a first pixel in a pixel array of pixels based on challenge data that designates a location of at least one pixel of the pixel array;
- selecting a second pixel in the pixel array to have a color identical to a color of the first pixel;
- extracting a noise value of each of the first pixel and the second pixel;
- and
- generating response data by comparing the noise value of the first pixel and the noise value of the second pixel.
Dependencies are inferred from the claim text.