Electrica

Just solved 2 challs at Electrica and advanced to Veteran Trooper, so I thought I should write something about it.

Electrica the Puzzle Challenge is a cool challenge site by Caesum, one of the best challengers out there. It is located at http://www.caesum.com.

At Electrica you can solve puzzles on cryptography, steganography, maths, programming, executables, misc, and sokoban too :) The puzzles are organized quite well. You start with easy puzzles, and when you solve enough of them you get access to the harder ones. There is enough information to get you started, and at the site you can even find a cool challengers handbook written by Caesum, which covers basic knowledge and techniques for challenge solving.

Give it a try, guys!