The paper explains the concept of codes and encryption as an introduction to the work and knowledge of what actually serves any cipher machine. Next is described the Enigma, as probably the most famous cipher machine, its parts, and working principle. Rotors and plugborad, one of the most important parts of Enigma, and mathematical analysis of permutations give so many combinations that are thought to it can not be decoded, but it worked out though, the first the Poles, and then the British. The paper also describes the principle of the attack on the Enigma.