Wun Code
RE

Reverse Engineering Challenges

Six challenges of rising difficulty where you reverse a check function or bytecode and extract the key with your own code, not by copying it.

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What you'll learn

  • The single-layer keyTry every key and pick the one closest to real text
  • Reversing the keygenUndo the transformation one step at a time to recover the key
  • The tiny machine's lockEmulate the machine with an input instruction, then reverse it to get the key
  • The hashBrute-force search over a small space
  • The hidden recordWalk through records of varying length
  • The final challengeA chain of steps that ends at the flag

Track contents

6 lessons, 2 hours in total
  1. 1The single-layer keyRETry every key and pick the one closest to real text
  2. 2Reversing the keygenREUndo the transformation one step at a time to recover the key
  3. 3The tiny machine's lockREEmulate the machine with an input instruction, then reverse it to get the key
  4. 4The hashREBrute-force search over a small space
  5. 5The hidden recordREWalk through records of varying length
  6. 6The final challengeREA chain of steps that ends at the flag

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