Towards the end of WWII, a special rewirable reflector wheel ( UKW-D) was introduced, as was an external device called Enigma-Uhr, or Stecker-Uhr. In some models, pairs of letters can be additionally swapped by interconnecting plugs ("stecker") on a plugboard via cables. Furthermore, the inner wiring as a whole can be rotated against the outer position indicator ring and, more importantly, against the trigger notches (this is known as "ring setting").
Bletchley park enigma simulator code#
By combining and rotating the wheels, however, a very complex substitution code is obtained. Inside a wheel each letter position is biuniquely rendered to another position through a fixed set of wires. The wheels advance stepwise with every keystroke, thereby triggering, in some positions, the adjacent wheel to the left to perform a step as well, pretty much as in a mechanical counter. This means the letter substitution scheme is not fixed but changes with the propagation of Enigma's rotating ciphering wheels and thus, with the letter's position in a text. Modus operandiĮnigma operates as a rotor machine to achieve polyalphabetic substitution. The successful reverse engineering of the machine in Poland and the codebreaking efforts at Bletchley Park (UK) involving thousands of people, among them several ingenious mathematicians, have become legend.
It was used to a great extent by Germany during World War II. The Enigma is probably the most famous electromechanical encryption device (or rather, series of devices).
0 kommentar(er)
