About

Below are some problems related to computer security (specifically poorly implemented security). Do Them. You are free to use any language and environment you like to complete them. The problems require familiarity with programming, but not necessarily with applied cryptography or computer security in general. An understanding of how some of the algorithms and tools in the problems work will be of use, so as a starting point you can find some resources to help you begin here. If this topic is new to you, you may want to start with the Tutorial Problems.

Problems

Easy Passwords

Warm up with some easy password cracking

Solved by 78
Not So Safe Primes

"Generating DH parameters... this is going to take a long time"

Solved by 23
Vigenère + Rail Fence

Good luck

Solved by 33
Rail Fence

Personally I would never rail a fence

Solved by 117
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