Video Integrity Verification With Signature-Based Tamper Response
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Solution Overview
Problem
Existing video data tampering detection technologies fail to adequately protect untampered video data when tampering occurs, as they do not effectively prevent the transmission of altered video content.
Innovation Solution
A video transmission apparatus generates a unique encrypted digital signature based on video data features, attached to the data as tampering detection data, and a video reception apparatus uses this signature to detect tampering, with the client apparatus stopping video delivery and initiating recording or changing delivery methods when tampering is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If video data is transmitted with digital signature attachment for tampering detection, then tampering detection capability is improved, but device complexity increases due to additional processing requirements
Solution Approach 1:
The patent applies preliminary action by generating and attaching the digital signature to video data before transmission occurs. The video transmission apparatus calculates a hash value of the video data and attaches an encrypted digital signature containing this hash value to the video data in advance, allowing the reception apparatus to verify integrity without complex real-time analysis during playback.
2Reliability
If tampering detection is implemented through digital signature verification, then video data protection is improved, but loss of time occurs due to verification processing
Solution Approach 1:
The verification mechanism is prepared in advance by attaching the digital signature to the video data during transmission. When the video data is received, the reception apparatus can immediately perform verification by comparing the received video data's hash value with the pre-attached digital signature, significantly reducing verification time compared to post-processing analysis.
3Reliability
If video delivery is stopped when tampering is detected, then reliability of video system is improved, but productivity decreases due to interruption of service
Solution Approach 1:
The patent implements feedback by having the video reception apparatus detect tampering through digital signature verification and send a notification back to the video transmission apparatus. Upon receiving the tampering detection notification, the transmission apparatus stops video delivery and initiates recording of the tampered video data, creating a closed-loop system that responds to integrity violations while maintaining service continuity for untampered data.
Data Source
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AI summary
A video reception apparatus (2000) configured to communicate with a video transmission apparatus (1000) includes one or more processors, and one or more memories storing instructions that, when executed by the one or more processors, cause the one or more processors to function as a reception unit configured to receive video data, a determination unit configured to determine whether the received video data has been tampered with, and a transmission unit configured to transmit, to the video transmission apparatus (1000), a command to change a setting related to video data recording in a case where the received video data is determined to have been tampered with.