Video Authentication via Spatial Domain Bit Markers
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Solution Overview
Problem
Video systems used for remote viewing, particularly in guided vehicles and industrial processes, face issues with image authenticity and integrity due to malfunctions at various stages of image processing, transmission, and display, leading to discrepancies between the original camera-captured images and remotely viewed images.
Innovation Solution
A method and system that generate and insert a digitally coded marker with a camera identifier and time variable into the video stream, allowing real-time verification of image freshness and origin through secure image transmission and processing, ensuring conformity between the original and displayed images by using redundant security processors and pattern-based encoding in the spatial domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If video signals are transmitted and processed through multiple stages (camera, transmission device, reception device, display device), then remote viewing capability is achieved, but image authenticity and integrity deteriorate due to potential malfunctions and errors at various stages
Solution Approach 1:
The patent applies preliminary action by embedding security markers and authentication data into the video signal at the source (camera stage) before transmission. This includes inserting timing information, camera identifiers, and integrity check codes that will later enable verification of the image's authenticity and freshness without requiring complex analysis of the entire transmission chain.
Solution Approach 2:
The patent implements feedback mechanisms where the received video signal is continuously verified against the embedded security markers. The system checks timing consistency, camera identifier matching, and integrity validation, providing real-time feedback on whether the displayed image genuinely corresponds to the current camera input. This creates a closed-loop verification system that maintains reliability.
2Reliability
If security markers and authentication data are embedded in every video frame, then image authenticity verification is improved, but data transmission volume and processing load increase
Solution Approach 1:
The patent applies local quality by embedding security markers selectively in specific regions or portions of the video frame rather than uniformly across the entire image. The authentication data, timing information, and camera identifiers are inserted in localized areas that do not interfere with the main visual content, thereby verifying authenticity while minimizing impact on data volume and visual quality.
Solution Approach 2:
The patent utilizes parameter changes by encoding security information in the temporal and spatial domains of the video signal. Timing information is embedded as metadata parameters, while camera identifiers and integrity codes are incorporated as discrete data elements that can be verified without increasing the core video data rate significantly.
3Reliability
If real-time verification of image freshness and origin is implemented, then operational safety is improved, but system processing time and computational resources increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and embedding timing information, camera identifiers, and integrity check codes into the video signal at the source before transmission. This preparation ensures that when the signal reaches the display device, verification can be performed rapidly by simply checking the pre-inserted markers rather than analyzing the entire image content, thus maintaining real-time operational safety with minimal processing delay.
4Reliability
If multiple security processors and redundant verification systems are deployed, then image integrity assurance is improved, but device complexity and cost increase
Solution Approach 1:
The patent introduces an intermediary approach by using embedded security markers as a mediator between the camera source and the display device. These markers act as a trusted intermediary that carries authentication information through the transmission channel, enabling verification without requiring direct complex interaction between multiple security processors. The markers serve as a simplified intermediary mechanism that maintains integrity assurance while reducing overall system complexity.
Data Source
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AI summary
The present invention describes a method and a system for securing a remote video transmission, the method comprising: - generating a digitally coded bit marker for an image acquired by a camera (111) of a video system, said coded marker comprising a camera identifier (111) and a time variable; - inserting said coded marker into the image taken by the camera (111) to create a secure image, said insertion being carried out by adding, for each bit of said coded marker, a pattern to said image in the spatial domain, the conversion of said pattern into the spectral domain being a predefined sub-matrix in which at least one frequency coefficient encodes said bit of the coded marker; - transmitting the secure image remotely; - acquiring said secure image remotely; - extracting said coded marker from said secure image;- a verification of the temporal variable by comparison with said temporal reference and of the camera identifier in order to check the temporal freshness of the secure image and its origin; - a report of a failure if at least one of the pieces of information contained in the coded marker violates a predefined security criterion.