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This document presents an introduction to x86_64 binary reverse engineering, the process of determining the operation of a compiled computer program without access to its source code, through a series of CrackMe programs.
There are a lot of excellent tutorials out there, but they mostly focus on the 32-bit x86 platform. Modern computers are, almost without exception, 64-bit capable, so this tutorial introduces 64-bit concepts immediately.
Welcome to the fantastic world of nerdy regex fun! Start playing by selecting one of the puzzle challenges below. There are a wide range of difficulties from beginner to expert.