Image Sensor Certificate Authentication Through CSI Image Frames
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Solution Overview
Problem
Existing camera authentication methods for image sensors in hosts, such as smartphones and vehicles, are inefficient due to the time-consuming retrieval of digital certificates via control interfaces, which increases boot time and vulnerabilities to cybersecurity threats.
Innovation Solution
Embedding digital certificates in Camera Serial Interface (CSI) image frames allows for rapid authentication by transmitting the certificates through a dedicated unidirectional data channel, reducing the need for control interface interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital certificates are transmitted via control interfaces for camera authentication, then authentication can be performed, but authentication execution time and boot time increase significantly
Solution Approach 1:
The patent uses CSI image frames as an intermediary carrier to transmit digital certificates. Instead of directly transmitting certificates through control interfaces, the system embeds them within image frames that are already being transmitted through the CSI interface, thus utilizing an existing communication channel as a mediator to avoid additional authentication time.
Solution Approach 2:
The CSI interface, originally designed solely for image data transmission, is made multi-functional by enabling it to carry both image frames and authentication certificates simultaneously. This eliminates the need for separate control interface interactions for certificate retrieval, reducing authentication time while maintaining reliability.
2Reliability
If digital certificates are retrieved via control interfaces, then authentication can be performed, but the process becomes vulnerable to cybersecurity threats
Solution Approach 1:
By using CSI image frames as an intermediary carrier, the patent bypasses control interfaces that are vulnerable to cyber threats. The certificate transmission is mediated through the image data channel, which is less susceptible to authentication attacks, thus reducing cybersecurity vulnerabilities while maintaining authentication reliability.
Solution Approach 2:
The patent extracts the certificate transmission function from the control interface and relocates it to the CSI image frame channel. This separation removes the authentication process from the vulnerable control interface ecosystem, isolating it from common cybersecurity threats that target control commands.
3Reliability
If multiple control interface interactions are used for certificate retrieval, then authentication can be performed, but device complexity and processing overhead increase
Solution Approach 1:
The CSI interface is enhanced to perform dual functions: transmitting image frames and embedding digital certificates within the same data stream. This multi-functionality eliminates the need for separate control interface interactions, reducing device complexity and processing overhead while maintaining authentication reliability.
Solution Approach 2:
The patent merges the certificate transmission function with the existing image frame transmission process. By combining authentication data with image data in the same CSI stream, the system reduces the number of separate control interface interactions required, simplifying the overall authentication process.
Data Source
AI summary
An image sensor, wherein the image sensor includes circuitry including a Camera Serial Interface, wherein the circuitry is configured to transmit a stored digital certificate to circuitry of a host via the Camera Serial Interface which authenticates the image sensor to the host, wherein the digital certificate is transmitted embedded in one or more Camera Serial Interface image frames.