Challenges → Reverse Engineering

XOR Loop Cipher Binary

Easy 100 pts 🚩 32 solves ⏱ Avg. time to solve: 59d 15h

Challenge Question

This binary transforms whatever you type with a simple, repeating byte-level operation and compares the result against a hardcoded target buried inside it. Whatever operation it used to scramble your input can just as easily be used to reverse it. Work out what input produces the expected result.
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Details

  • CategoryReverse Engineering
  • Authortark
  • AddedJul 4, 2026
  • Avg. Time to Solve59d 15h
  • First Blood🩸 ookoro

Recent Solvers

  • Pha1ant 15h ago
  • jamarcriteo 4d ago
  • piyush69 5d ago
  • Max Oct 18, 2026
  • geraldvillarias Oct 17, 2026
  • JSterling Oct 12, 2026
  • amalmj Oct 7, 2026
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