adlee-was-taken
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ef5a9ce9cb
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Add per-channel hybrid audio spread spectrum and env feature toggles
Spread spectrum v2: independent per-channel embedding with round-robin
bit distribution, preserving spatial stereo/surround mix. Adaptive chip
tiers (256/512/1024) trade capacity for lossy codec robustness. LFE
channel skipped for 5.1+ layouts. v2 header (20B) with backward-
compatible v0 decode fallback.
Environment toggles (STEGASOO_AUDIO, STEGASOO_VIDEO) gate audio/video
features for minimal builds (e.g. Raspberry Pi image-only). Values:
auto (default, detect deps), 1/true (force on), 0/false (force off).
Web UI fixes: accordion defaults to step 1 on load, chevron arrow
styling, required attribute toggling for audio carrier type switch,
"Images & Mode" renamed to "Reference, Carrier, Mode".
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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2026-02-28 11:58:40 -05:00 |
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adlee-was-taken
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0248bec813
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Add audio steganography with LSB and spread spectrum modes
Implement two audio embedding modes following the same multi-factor
authentication pipeline as image steganography (passphrase + PIN +
optional RSA key + optional channel key):
- audio_lsb: High-capacity LSB embedding in PCM samples for lossless
formats (WAV/FLAC). Uses ChaCha20-keyed sample index selection.
- audio_spread: Direct-sequence spread spectrum (DSSS) with ChaCha20-
keyed bipolar chip codes, Reed-Solomon error correction, and 3-copy
majority-voted length headers. Designed to survive lossy compression.
New files:
- audio_steganography.py: LSB embed/extract on PCM samples
- spread_steganography.py: Spread spectrum embed/extract
- audio_utils.py: Format detection, transcoding, validation helpers
- tests/test_audio.py: 22 tests covering both modes end-to-end
Updated encode.py, decode.py, cli.py (audio-encode/audio-decode
commands), constants.py, models.py, exceptions.py, validation.py,
__init__.py, and pyproject.toml ([audio] extra).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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2026-02-27 20:26:07 -05:00 |
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