High-Speed Mobile Image Packet Security via Extended Nonce Transmission
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Solution Overview
Problem
Existing CSI-2 packet structures are inadequate for supporting diverse uses in mobile and IoT equipment, particularly in enhancing safety through secure nonce value management.
Innovation Solution
An information processing apparatus and communication system that transmits extended packets with an extended packet header, generates first protected data using a session key, and updates the nonce value for the session key during high-speed data transmission, storing the nonce value outside the packet header.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a 16-bit message count value is used as a nonce value without changes, then the existing packet structure can be utilized, but nonce value roll-over occurs which compromises security
Solution Approach 1:
The nonce value transmission is segmented into two parts: part of the nonce value is stored in the extended packet header, and the remaining part or whole is transmitted separately outside the packet header. This segmentation allows the system to use a larger effective nonce space while maintaining compatibility with existing packet structures.
Solution Approach 2:
The patent moves the nonce value transmission to another dimension by transmitting it outside the traditional packet header structure. This allows the nonce to be expanded beyond the 16-bit limitation while keeping the packet header format relatively intact.
2Reliability
If the nonce value is stored inside the extended packet header, then packet integrity is maintained, but the nonce value may roll over and compromise security
Solution Approach 1:
The patent extracts part or all of the nonce value from the extended packet header and transmits it separately outside the packet structure. This extraction prevents nonce roll-over issues while ensuring the nonce value is still properly transmitted and received.
3Adaptability or versatility
If extended packet headers are used to support diverse applications, then adaptability improves, but the risk of nonce value manipulation increases
Solution Approach 1:
The patent uses an intermediary approach by transmitting the nonce value through a separate channel outside the packet header. This intermediary transmission method protects the nonce from potential manipulation within the packet structure while still supporting diverse applications through the extended packet header.
Data Source
AI summary
Information processing apparatus, mobile apparatus, and communication systems are disclosed. In one example, an information processing apparatus performs high-speed data transmission of data of a frame including image data, transmits an extended packet including an extended packet header and packet data to a different information processing apparatus. First protected data of the packet data is generated with use of a session key, and a nonce value for the session key is updated every time the first protected data is generated. Further, the image data is stored in the packet data, the high-speed data transmission includes transmission of part or a whole of the nonce value, and the part or the whole of the nonce value is stored outside the extended packet header and transmitted. As an example, the information processing can be applied to communication systems compliant with the MIPI standard.