Challenges → Cryptography

Hidden Message

Medium 150 pts 🚩 26 solves ⏱ Avg. time to solve: 73d 21h

Challenge Question

Our intelligence team intercepted a short internal memo, but it reads as pure nonsense. Whoever sent it ran it through a quick, reversible scrambling scheme before shipping it out -- not real cryptography, just enough to make it unreadable at a glance. Recover the original text and find the flag hidden inside.
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Details

  • CategoryCryptography
  • Authortark
  • AddedJun 17, 2026
  • Avg. Time to Solve73d 21h
  • First Blood🩸 ookoro

Recent Solvers

  • BlackCipherX 5d ago
  • piyush69 5d ago
  • Max Oct 18, 2026
  • Nyx_Nightmare Oct 12, 2026
  • keybe456 Oct 12, 2026
  • durga Oct 9, 2026
  • amalmj Oct 7, 2026
  • V1XU Oct 3, 2026
  • ajay Oct 2, 2026
  • yadish Sep 29, 2026
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