hacker.org

In this challenge are we to assume that the enigma machine is identical to the one linked?

We're suppose to guess which of the 5 discs are used, which order they were used, and what 3 letter key was used to start the cypher. Correct?

Do we also have to guess at additional "Steckers" (twisted letter pairs?) Or is "AT", and "EN" the only two?

Yes, the machine is the linked one, and we have to chose the rotors and their initial positions. There are no additional steckers.

I guess the next enigma challenge uses 3 or 4 unknown steckers.

Ah, I got it. Thanks.

I had a slight bug in my code.

The linked machine seems to have a strange carry over behavior. When all three rotors are rotated, this takes place in two steps and the second one is rotated twice. Is this a bug in the swf or did I understand something wrong and it is supposed to be like that?

papa wrote:The linked machine seems to have a strange carry over behavior. When all three rotors are rotated, this takes place in two steps and the second one is rotated twice. Is this a bug in the swf or did I understand something wrong and it is supposed to be like that?

The Wikipedia article describes:

http://en.wikipedia.org/wiki/Enigma_machine wrote:The second rotor also advanced at the same time as the third rotor, meaning the second rotor can step twice on subsequent key presses—"double stepping"—resulting in a reduced period.

It seems the swf behaves incorrectly when deleting letters, although it doesn't affect this challenge.

This is an interesting video on WWII rotors machines:
http://www.khanacademy.org/science/brit ... n-machines by Brit Cruise on Khan Academy.

And these are the slides by R. Banach i used to solve the challenge, also with some interesting historic background:
http://www.cs.man.ac.uk/~banach/COMP614 ... Enigma.pdf