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How to write a CrackMe for a CTF competition

Bartosz Wójcik

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Bartosz Wójcik

With the growing popularity of CTF (capture the flag) competitions, and the excellent performance of Polish teams like Dragon Sector in this area, I thought it would be interesting to demonstrate the construction of a simple CrackMe, using some creative techniques which make it difficult to crack and analyse.


If you have ever been curious about reverse engineering, entered a CTF competition, or wanted to create your own CrackMe and drive other contestants crazy, this article is for you.


Sources at GitHub with english comments


Edited by Bartosz Wójcik
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