Waveform Watermarking via Jitter Modulation for Data Integrity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The integrity of data transmitted between devices is often compromised due to interception, spoofing, or tampering, making it difficult to ensure that the information received is authentic and unaltered, especially as the volume of information exchanged increases.
Innovation Solution
The implementation of a watermarking technique that embeds covert symbols within overt data transmissions using jitter modulation on the clock frequency, allowing for detection of alterations and ensuring the integrity of the data by triggering an alarm if the watermark is lost or altered, while remaining imperceptible to improper receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If watermarking is embedded in data transmissions to ensure integrity, then data authenticity is improved, but detection difficulty increases for improper receivers
Solution Approach 1:
The patent embeds watermark information in specific local regions of the data transmission stream using jitter modulation, where the watermark is concealed within normal timing variations at particular locations rather than uniformly across the entire signal. This allows proper receivers with knowledge of the embedding locations to detect the watermark while improper receivers cannot easily find or detect it.
Solution Approach 2:
The patent uses jitter modulation as an intermediary mechanism to embed the watermark. The watermark is not directly embedded but is conveyed through subtle timing variations that serve as an intermediate carrier, requiring specialized detection methods to extract the hidden information while remaining imperceptible to standard receivers.
2Difficulty of detecting and measuring
If jitter modulation is used to embed covert symbols, then watermark imperceptibility is improved, but measurement precision requirements increase
Solution Approach 1:
The patent modulates the jitter parameter of the clock signal to embed watermark information. By changing the timing jitter within normal operational variations, the watermark becomes imperceptible to standard receivers while still being detectable by proper receivers that can measure and analyze the precise timing variations.
3Reliability
If alarm triggering is implemented when watermark is altered, then data integrity monitoring is improved, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the receiver detects the watermark, verifies its integrity, and triggers an alarm if the watermark is altered or missing. This feedback loop provides automatic integrity monitoring, where the alarm system responds to detection results, ensuring that any tampering with the watermarked data is immediately flagged.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively ensures the integrity of data by making any attempts to capture or alter the watermarked waveform detectable, thereby alerting proper personnel and maintaining data authenticity, while appearing as normal noise to less stable receivers.
Implementation Method 1
The implementation of a watermarking technique that embeds covert symbols within overt data transmissions using jitter modulation on the clock frequency
Data Source
AI summary
Generally discussed herein are systems, devices, and methods for waveform watermarking. A device can include an overt symbol modulator to receive mapped overt data and provide overt data modulated in accord with an overt data modulation scheme, a covert symbol modulator to receive mapped covert data and provide, using dither modulation and micro-amplitude modulation, covert data modulated in accord with a covert data modulation scheme, a switch to receive the modulated covert data and the modulated overt data and forward the covert data and modulated overt data based on a signal indicating whether covert data is to be transmitted or covert data is to be transmitted, and transmission circuitry to produce an electromagnetic waveform of the modulated data from the switch.