competition-stego-media
Competition Stego Media
Use this skill only as a downstream specialization after $ctf-sandbox-orchestrator is already active and has established sandbox assumptions, node ownership, and evidence priorities. If that has not happened yet, return to $ctf-sandbox-orchestrator first.
Use this skill when the challenge lives inside a media container, hidden channel, or appended payload rather than a conventional crypto blob.
Reply in Simplified Chinese unless the user explicitly requests English.
Quick Start
- Confirm the real container type, dimensions, duration, codec, and chunk layout before guessing a hidden layer.
- Check metadata, thumbnails, sidecar files, and appended trailers before deeper signal-domain work.
- Rank candidate channels by evidence: alpha, palette, LSB, transform-domain residue, frame order, or container slack.
- Preserve each extracted layer separately so the transform chain stays reproducible.
- Stop when the hidden payload is reproduced, not merely suspected.
Workflow
1. Establish Container Truth
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