Challenges → Cryptography

Hidden Message

Medium 150 pts 🚩 2 solves ⏱ Avg. time to solve: 25d

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
  • Authoradmin
  • AddedJun 17, 2026
  • Avg. Time to Solve25d
  • First Blood🩸 harshith

Recent Solvers

  • temp 5d ago
  • sneha43 Jul 24, 2026
  • ananya74 Jul 21, 2026
  • neha11 Jul 21, 2026
  • meera78 Jul 20, 2026
  • vikram66 Jul 16, 2026
  • matrix_hacker Jul 5, 2026
  • jay Jun 18, 2026
  • harshith Jun 17, 2026
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