Solid-state imaging device, method for driving solid-state imaging device, and electronic apparatus with physically unclonable function

A solid-state imaging device comprising:

• a pixel portion in which a plurality of pixels including photodiodes are arranged in rows and columns;
• a reading circuit reading pixel signals from the pixel portion;
• a key generation circuit which generates a unique key by using at least one of pixel fluctuation information or reading circuit fluctuation information;
• and
• an information acquisition circuit for acquiring the pixel fluctuation information,
• wherein the information acquisition circuit acquires the fluctuation information of the pixel linked with a threshold value.

A method for driving a solid-state imaging device including

• a pixel portion in which a plurality of pixels including photodiodes are arranged in rows and columns and
• a reading circuit reading pixel signals from the pixel portion, comprising
• an information acquisition step of acquiring at least one information of pixel fluctuation information or reading circuit fluctuation information and
• a key generation step of generating a unique key by using the fluctuation information acquired in the information acquisition step,
• wherein the information acquisition step acquires the fluctuation information of the pixel linked with a threshold value.

An electronic apparatus comprising:

• a solid-state imaging device;
• and
• an optical system of forming a subject image in the solid-state imaging device, wherein the solid-state imaging device includes
• a pixel portion in which a plurality of pixels including photodiodes are arranged in rows and columns,
• a reading circuit reading pixel signals from the pixel portion,
• a key generation circuit for generating a unique key by using at least one of pixel fluctuation information or reading circuit fluctuation information, and
• an information acquisition circuit for acquiring the pixel fluctuation information,
• wherein the information acquisition circuit acquires the fluctuation information of the pixel linked with a threshold value.