Camera Authentication via Light Intensity Offset Fingerprinting
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Solution Overview
Problem
Autonomous vehicles face security risks due to the potential for malicious cameras to tamper with video data, compromising the entire driving system, as existing authentication methods rely on digital certificates or keys that can be easily extracted.
Innovation Solution
A camera authentication method that uses light intensity offset values of photosensitive units as a fingerprint, determining a matching degree with a preset vector to authenticate cameras without the need for digital certificates or keys, thereby enhancing security and reducing development costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital certificates or keys are installed in the camera for authentication, then authentication security is improved, but the risk of certificate exposure and malicious tampering increases
Solution Approach 1:
The patent extracts the authentication function from software-based digital certificates and keys, and relocates it to hardware-based physical characteristics of the camera sensor. By taking out the vulnerability of stored credentials and replacing them with inherent physical properties, the system maintains authentication security while eliminating the exposure risk associated with digital certificates.
Solution Approach 2:
The camera's photosensitive units naturally produce unique light intensity offset values as part of their normal operation. These physical characteristics serve as intrinsic authentication identifiers without requiring additional authentication components or pre-programmed credentials. The camera authenticates itself through its inherent physical properties rather than relying on externally provided security credentials.
2Reliability
If preprogramming or modification is performed on the camera for authentication, then authentication capability is improved, but development cost and complexity increase
Solution Approach 1:
The camera sensor automatically generates unique authentication identifiers through its inherent physical characteristics - the light intensity offset values of photosensitive units. No preprogramming, modification, or additional authentication components are required during manufacturing. The authentication capability emerges naturally from the camera's normal operational parameters, eliminating extra development steps and costs.
Solution Approach 2:
The photosensitive units serve dual functions: capturing light intensity information for normal camera operation and providing unique physical characteristics for authentication. This multi-functionality eliminates the need for separate authentication components or modifications, as the existing image sensor infrastructure is leveraged for both imaging and security purposes.
3Measurement precision
If light intensity offset values of all photosensitive units are used for authentication, then authentication precision is improved, but processing time and computational complexity increase
Solution Approach 1:
The patent extracts only the essential authentication information from the complete set of photosensitive units by selecting N representative units with the largest light intensity offset values. This extraction approach maintains authentication precision by focusing on the most distinctive characteristics while reducing the data volume from M total units to N selected units, thereby decreasing processing time and computational burden.
Solution Approach 2:
Instead of uniformly processing all photosensitive units, the patent applies local quality by selectively focusing on specific units with the largest light intensity offset values. These particular units provide the most distinctive authentication signature, so concentrating processing resources on them achieves high authentication precision with reduced overall processing requirements compared to uniform processing of all units.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively improves camera security by authenticating cameras based on physical characteristics, reducing the risk of malicious tampering and eliminating the vulnerability of digital certificate exposure, while minimizing modifications to the camera and development costs.
Implementation Method 1
determining one or more light intensity offset values of N photosensitive units based on the one or more frames of the first image
Data Source
AI summary
A camera authentication method and a control apparatus are provided, and are applicable to an identity authentication of an on-board camera in the autonomous driving field. The method includes: obtaining one or more frames of a first image shot by a to-be-authenticated camera; determining one or more light intensity offset values of N photosensitive units based on the one or more frames of the first image; determining a matching degree between the light intensity offset values of the N photosensitive units and a preset N-dimensional vector; and if the matching degree meets a preset condition, determining that authentication of the to-be-authenticated camera succeeds, where the N photosensitive units are in a photosensitive layer of the to-be-authenticated camera, and the photosensitive layer includes M photosensitive units, where N≤M. This technical solution is used to improve camera security.