In-Vehicle Camera Partial Encryption for Low-Load Image Safety
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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 method that dynamically changes the designated portion of the image data to be encrypted with time, reducing processing load by encrypting only a partial region of the captured image and ensuring safety by randomly varying the encryption region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire output image is encrypted to ensure safety, then security is improved, but processing load and power consumption increase
Solution Approach 1:
The patent divides the output image into multiple regions and selectively encrypts only specific regions (such as regions containing important objects or suspicious areas) rather than the entire image. This segmentation approach maintains security for critical areas while significantly reducing the processing load and power consumption compared to full-image encryption.
Solution Approach 2:
The patent applies different processing qualities to different regions of the image. Important regions that require security verification are encrypted with high quality, while other regions use lower processing intensity or no encryption. This local differentiation optimizes the balance between security and power consumption based on the specific requirements of each image region.
2Use of energy by moving object
If a fixed region is used for encryption to reduce processing load, then power consumption is reduced, but security is compromised because the same region is always encrypted
Solution Approach 1:
The patent implements dynamic region selection for encryption, where the encrypted regions change over time based on image content analysis, detection results, or random selection. This dynamic approach ensures that malicious actors cannot predict which regions will be encrypted, maintaining security while still limiting the encryption scope to reduce power consumption compared to full-image encryption.
Solution Approach 2:
The patent employs periodic changes in the encrypted regions, switching between different regions at regular intervals or based on detection cycles. This periodic variation prevents fixed-pattern attacks while maintaining a manageable processing load, as only a subset of regions is encrypted at any given time rather than the entire image continuously.
3Reliability
If the entire video data is signed to ensure safety, then security is improved, but processing load increases
Solution Approach 1:
The patent extracts and signs only specific portions of the video data (such as region identifiers, encryption parameters, or key frames) rather than the entire video stream. This extraction approach maintains the integrity verification capability while significantly reducing the data volume that requires signing, thereby improving processing efficiency without compromising security.
Solution Approach 2:
The patent applies signing to a partial set of video data elements that are sufficient for security verification purposes. By signing only the critical portions (such as region definitions, encryption keys, or representative frames) rather than every frame completely, the system achieves adequate security with reduced processing overhead, accepting that not all data elements are signed.
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.