Dynamic Digital Watermark Temporal Validation
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Solution Overview
Problem
Current digital watermarking technologies for identification documents lack effective methods to provide simultaneous validation and authentication of both the document and the person holding it, with limited temporal presentation patterns and lack of robustness against tampering.
Innovation Solution
A method involving the application of multiple digital watermarks with distinct temporal presentation patterns, encoding information about the issuer and holder, and using luminance and chrominance modulations to create a secure and tamper-proof validation sequence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple digital watermarks are applied with distinct temporal presentation patterns, then document authentication and validation are enhanced, but device complexity increases
Solution Approach 1:
The authentication system is segmented into multiple independent digital watermarks (first watermark 402, second watermark 404, third watermark 406) that can be independently generated, embedded, and validated. Each watermark contains distinct information and can be presented at different times, allowing the system to maintain high reliability while managing complexity through modular design.
Solution Approach 2:
The watermarks are presented in a periodic temporal pattern where the first watermark is presented initially, followed by the second watermark after a first time interval, and the third watermark after a second time interval. This periodic presentation enhances authentication reliability by providing time-stamped validation while maintaining manageable system complexity through structured timing protocols.
2Reliability
If digital watermarks are made imperceptible to enhance security, then robustness against tampering improves, but ease of detection and measurement deteriorates
Solution Approach 1:
A specialized reader device acts as an intermediary between the imperceptible digital watermarks and the validation system. The reader device contains the necessary algorithms and processing capabilities to detect and extract the imperceptible watermarks, allowing them to remain hidden to the human eye while being easily detectable by the appropriate measurement tool.
Solution Approach 2:
The detection mechanism transitions from human visual inspection to automated digital processing. The reader device uses computational algorithms to detect and validate the digital watermarks, replacing the mechanical/visual detection process with an electronic/digital one that can easily process imperceptible signals while maintaining high detection accuracy.
Data Source
AI summary
Some implementations may include a computer-implemented method for applying at least two digital watermarks to a digital document, the method including: receiving a digital document comprising visual contents; generating a first digital watermark to be visually presented at a first time point; generating a second digital watermark to be visually presented at a second time point, the second digital watermark being different from the first digital watermark and the second time point being different from the first time point; and applying both the first digital watermark and second digital watermark to the digital document t.