Koteswararao Satunuri

Project name : Extracting signatures to generate camera PUFs( Physically unclonable functions ).

Summary : Camera PUF
Image sensors such as CMOS (Complementary Metal Oxide Semiconductor) image sensor and CCD(charge coupled device) image sensor are widely used in digital cameras, mobile phones, and various other imaging devices. These sensors are composed of an array of pixels, each of which consists of a photo detector and readout circuitry. Due to variations in the manufacturing process, each pixel may exhibit slight differences in behavior, resulting in what’s called fixed pattern noise (FPN).This unique fixed pattern noise (FPN) exhibited by each sensor serves as the basis for generating a device-specific identifier or cryptographic key. The idea is to capture the FPN from the sensor’s output images and process it to create a stable and repeatable representation of the sensor’s unique behavior.
In the context of camera systems, the use of PUFS can provide a robust method for ensuring the authenticity and integrity of the devices. This is particularly important in applications such as surveillance, where the trustworthiness of the camera is crucial. By generating unique signature currents from camera sensors, we can create camera PUFs that offer a secure means of device authentication and protect against counterfeiting and tampering.

Objective of this project:

The primary objective of this project is to generate a unique signature for camera devices, providing forensic evidence that images were indeed captured by the specified camera. This aims to enhance security, prevent counterfeiting, and improve the reliability of camera-based systems.

The specific objectives of the project are as follows:

1. To build an image sensor using commercially available components and ensure the sensor is capable of capturing images with the necessary quality and consistency for signature extraction. To develop a method to extract unique signature currents from the image sensor. Ensure that the signatures are robust, reproducible, and unique to each camera device.
2. To create PUFS for both linear CCD (TCD1304) and CMOS image sensors. Conduct a com- parative analysis of the signatures generated from both types of sensors. Identify the strengths and weaknesses of each sensor type in terms of signature generation and security.
3. By achieving these objectives, the project aims to contribute to the development of secure camera systems, providing a reliable method for device authentication and image verification. This work has the potential to impact various fields where the integrity and authenticity of captured images are crucial.