Image Sensor Security Key Updates Through Autonomous Timing
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Solution Overview
Problem
Existing systems face difficulties in efficiently managing and updating security keys for data encryption and tamper detection between image sensors and processors, particularly when multiple sensors are involved, as it is challenging for a single processor to coordinate key updates across them.
Innovation Solution
A communication system is implemented where image sensors manage their own key update timings and notify a host processor through a dedicated communication interface, allowing for seamless key updates without the host processor needing to track individual sensor deadlines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a processor serves as a host to manage key updates for multiple image sensors, then key distribution and security management can be centralized, but the processor becomes overwhelmed with the complexity of tracking and coordinating update timings for many sensors
Solution Approach 1:
Each image sensor autonomously manages its own key update timing by internally tracking the usable period of its security keys and initiating update requests to the processor only when needed, eliminating the need for the processor to continuously monitor and coordinate updates for multiple sensors
Solution Approach 2:
The centralized key management function is segmented into independent units at each sensor, where each sensor independently tracks its own key validity period and manages its own update schedule, distributing the management burden from the processor to individual sensors
2Reliability
If key updates are triggered by processor-initiated distribution, then security keys can be systematically updated across the system, but it becomes difficult for one processor to manage update timings of keys for many image sensors
Solution Approach 1:
Instead of the processor initiating and coordinating key updates for all sensors, the inversion approach allows each sensor to autonomously determine when its keys need updating and actively request updates from the processor, reversing the traditional client-server update model
Solution Approach 2:
Each sensor provides feedback to the processor regarding its key update needs by monitoring its own key usable period and initiating update requests when the period is approaching expiration, creating a demand-driven update mechanism
Data Source
AI summary
The present technology relates to a transmission device, a reception device, an information processing method, a program, and a communication system capable of easily updating a key used for security processing performed on data output by a sensor.A transmission device according to an embodiment of the present technology controls security processing performed on output data of each of frames output by a sensor and transmission of information indicating an update timing of a key used for the security processing to a reception device that is a transmission destination of the output data and transmitting frame data in a predetermined format used for transmission of the output data subjected to the security processing. The present technology can be applied to devices that perform communication based on an SLVS-EC standard.