Subliminal Symbol Verification for Mission-Critical Display Integrity
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Solution Overview
Problem
In safety-critical industries, the use of uncertified displays for mission-critical information is hindered by regulatory requirements for certified displays that ensure adequate integrity, continuity, and availability (ICA), which are costly and time-consuming to certify, limiting the adoption of new applications like personal electronic devices (PEDs) for displaying critical aeronautical information.
Innovation Solution
A system that uses a certified server to generate mission-critical data for uncertified displays, embedding subliminal symbols in application data using steganography, capturing and verifying the displayed images to ensure ICA, and annunciating errors, allowing uncertified displays to safely show critical information without full certification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If uncertified displays are used for mission critical information, then cost and time for certification are reduced, but integrity, continuity, and availability cannot be assured
Solution Approach 1:
The system performs preliminary actions by embedding subliminal symbols and steganographic markers into the display data before it is shown on the uncertified display. These embedded elements serve as pre-prepared verification mechanisms that enable later detection of data integrity without requiring full prior certification of the display device.
Solution Approach 2:
The system establishes a feedback loop where the embedded subliminal symbols and steganographic markers are detected and verified after display. This feedback mechanism allows the system to confirm whether the displayed information maintained its integrity, continuity, and availability despite using an uncertified display device.
2Reliability
If certified displays are used for mission critical information, then integrity, continuity, and availability are assured, but cost and time for certification increase
Solution Approach 1:
The system extracts the essential verification function from the complex certification process. Instead of requiring full certification of the display device, the system takes out only the critical verification need and satisfies it through embedded subliminal symbols and steganographic markers that can be detected and verified without comprehensive device certification.
Solution Approach 2:
The embedded subliminal symbols and steganographic markers serve as intermediaries between the display system and the verification process. These markers mediate the verification of data integrity by providing detectable signals that confirm proper display function without requiring the display device itself to be certified.
3Measurement precision
If subliminal symbols are embedded in multiple frames, then detection accuracy improves, but processing complexity increases
Solution Approach 1:
Instead of embedding subliminal symbols in every frame, the system uses periodic action by inserting them at specific intervals (e.g., every 10th or 20th frame). This periodic embedding maintains detection accuracy over time while significantly reducing the processing complexity compared to continuous embedding in every frame.
Solution Approach 2:
The system applies partial action by embedding subliminal symbols in only a subset of frames rather than all frames. This partial embedding provides sufficient verification capability for detecting integrity issues while avoiding the excessive processing burden of analyzing every single frame for embedded markers.
Data Source
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AI summary
A method for verifying the integrity, continuity, and availability (ICA) of information displayed on an uncertified display is disclosed. The method includes creating application data for display on the uncertified display device that includes a subliminal symbol that is periodically embedded in a few out of multiple tens of frames and that is camouflaged in the application data using steganography; transmitting the application data to the uncertified display device for display; receiving images of the application data displayed on the display screen; determining whether the subliminal symbol is detected in the captured images by extracting the symbol from the captured images and comparing the extracted symbol to an expected symbol; determining that the application data is not corrupted when the extracted symbol matches the expected symbol; and identifying a loss of ICA when the subliminal symbol is not detected or does not match the expected symbol.