[NYer]

The plugboard (Steckerbrett) was positioned at the front of the machine, below the keys. In the above photograph, two pairs of letters have been swapped (A↔J and S↔O). During World War II, ten leads were used, leaving only six letters 'unsteckered'.

Cryptanalysis of the Enigma

[Dr. Ursus]

The entire story around Enigma is fascinating. I hope to visit Bletchley Park next year.

[ken5050]

Alan Turing was a genius. They’re currently filming a big budget biopic..

[SunkenCiv]

thanks NYer.