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performing-steganography-detection

Detect and extract hidden data embedded in images, audio, and other media files using steganalysis tools to uncover covert communication channels.

internal/tools/skills/data/digital-forensics/performing-steganography-detection/SKILL.md

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# Performing Steganography Detection

## When to Use
- When suspecting covert data hiding in images, audio, or video files
- During investigations involving suspected data exfiltration via media files
- For analyzing files in espionage or insider threat investigations
- When standard file analysis reveals anomalies in media file properties
- For detecting communication channels using steganographic techniques

## Detection Gaps & Validation

Steganalysis is asymmetric: a null result rarely means "clean," and a statistical spike rarely means "stego." Treat both with discipline:

- **A null result is NOT proof of a clean file.** `zsteg`/`steghide`/`stegoveritas` finding nothing only rules out the schemes and passwords you tried. steghide on a JPEG needs the correct passphrase (run `stegseek` against a wordlist before concluding "empty"); DCT, palette, and bit-plane methods evade LSB-only checks; and modern adaptive embedding (e.g., F5, matrix encoding) leaves minimal statistical trace. Report "no stego detected with tools X using wordlist Y," not "no hidden data."