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MasterCryptographic weakness

Breaking Crypto & Race Conditions

Two classes that reward patience. This path covers the cryptographic misuse that lets you forge a value the server trusts, and the race conditions that slip two requests through a check meant for one.

Syllabus

  1. 1Understanding cryptographic weaknessReading10 min
  2. 2Lab: the JWT signed with a guessable secretLab90 min
  3. 3Understanding race conditionsReading10 min
  4. 4Lab: withdrawing a balance in parallelLab90 min
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