I've been developing a steganography-focused CTF named Venatus (which means 'hunt' in Latin) and genuinely welcome feedback from those more experienced in this area. Here’s one of the smaller puzzles as a taste — these two strings look identical:
4a6e78a6356461a2
4a6e78a6356461a2
They are not. That is the whole puzzle.
If you crack it — that’s level 6 of 20. The rest cover LSB, JPEG/DCT-domain hiding, echo hiding in audio, network covert channels (DNS-based), a font-glyph technique, and a One-Time-Pad finale. No login, no paywall, and every level includes a full technical writeup afterward if you want to know exactly how it works.
Finish all 20 levels, and I’ll invite you to help design level 21 — genuinely want ideas from people who’ll spot things I didn’t think of.
Happy to accept any critique, especially on the harder levels.
Source: r/Steganography · by /u/PapaHatziHaralambous