@ombrix/stego-forensics

Statistical steganalysis and image tampering forensic detection suite.

Part of the OMBRIX zero-telemetry steganography suite.

Installation

npm install @ombrix/stego-forensics

Quickstart

import { runRsSteganalysis, analyzeConsensus } from '@ombrix/stego-forensics';

// 1. Run Fridrich RS Steganalysis
const rsReport = runRsSteganalysis(imageData);
console.log('Estimated payload ratio:', rsReport.estimatedPayloadRatio);
console.log('Stego anomaly detected?', rsReport.classification !== 'clean');

// 2. Run multi-detector consensus (RS + SPA + Chi-Square + Laplacian Residuals)
const consensus = analyzeConsensus(imageData);
console.log('Overall forensic verdict:', consensus.verdict);
console.log('Confidence score:', consensus.confidenceScore);

Supported Detectors

• Fridrich RS Steganalysis: Evaluates regular vs singular group flipping ratios across channel blocks.
• Dumitrescu Sample Pair Analysis (SPA): Finite state machine analyzing pixel difference pairs.
• Westfeld Chi-Square PoVs: Detects histogram equalization and Pairs of Values anomalies.
• Laplacian Residual Noise Variance: Computes high-frequency perturbation indices (HFPI).

License

MIT © SanthaKumar K