Dynamic Region Encryption for In-Vehicle Camera Signals
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Solution Overview
Problem
Existing technologies face challenges in ensuring the safety of in-vehicle camera output images while maintaining a low processing load, leading to increased power consumption and size constraints due to high-load processing requirements for encryption and authentication.
Innovation Solution
A signal processing device and method that encrypts only a designated portion of the output data, changing the encrypted region with time, ensuring safety by making it difficult for malicious actors to falsify the image without requiring extensive processing resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire output image is encrypted to ensure safety, then image integrity is protected, but processing load and power consumption increase significantly
Solution Approach 1:
The patent divides the output image into multiple regions and selectively encrypts only specific regions of interest rather than the entire image. This segmentation approach reduces the amount of data requiring encryption, thereby lowering processing load and power consumption while still protecting critical information that requires security validation.
Solution Approach 2:
The patent applies different quality levels of security processing to different regions of the image. Critical regions containing important information are encrypted with high security, while non-critical regions are either encrypted with lower security or left unencrypted. This local differentiation optimizes the balance between security and processing efficiency.
2Use of energy by moving object
If a fixed region is encrypted to reduce processing load, then power consumption decreases, but security is compromised as malicious actors can target unencrypted regions
Solution Approach 1:
The patent dynamically changes the encryption region across different frames or time periods. Regions that are encrypted in one frame may be unencrypted in the next, and vice versa. This dynamic adjustment prevents malicious actors from identifying and exploiting fixed unencrypted regions, thereby maintaining security while allowing selective encryption to reduce processing load.
Solution Approach 2:
The patent implements periodic rotation of encryption regions, where specific regions are encrypted in alternating frames or at periodic intervals. This periodic pattern ensures that over time, different portions of the image receive security protection, preventing attackers from consistently targeting the same vulnerable areas while maintaining lower average processing requirements.
3Use of energy by moving object
If selective region encryption is implemented, then processing load is reduced, but determining which regions to encrypt adds system complexity
Solution Approach 1:
The patent performs preliminary identification of regions requiring encryption before the encryption process itself. By pre-determining which regions should be encrypted based on image content analysis, metadata, or predetermined criteria, the system avoids adding complex real-time decision-making during the encryption process, thereby reducing overall system complexity while still achieving selective encryption benefits.
Data Source
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AI summary
The present technology relates to a signal processing device, a signal processing method, and a program for enabling reduction of a processing load while ensuring safety. The signal processing device includes a control unit configured to acquire designation information indicating a designated portion to be encrypted in output data and an encryption processing unit configured to encrypt the designated portion indicated by the designation information in the output data using a key. Furthermore, the designated portion indicated by the designation information is changed with time. The present technology can be applied to an in-vehicle camera.