Talk:Enigma rotor details

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Commercial Enigma

Here is the info from the enigma commercial version:

DMTWSILRUYQNKFEJCAZBPGXOHV ROTOR # I

HQZGPJTMOBLNCIFDYAWVEUSRXL ROTOR # II

UQNTLSZFMREHDPLKIBVYGJCWGA ROTOR # III

FROM CRYPTOLOGIA NUMBER XXIV: BY DAVID HAMER.

I CAN PROVIDE THE UKW (REFLECTOR AND ENTRY AS WELL IF REQUESTED)

ALSO I CAN PROVIDE WHERE THE NOTCHES ARE ON THE ROTORS, IF DESIRED.

Please request info from brian.scott.andrews at gmail.com

Ref:

http://frode.home.cern.ch/frode/crypto/BPAbwehr/Abwehr_theft.html http://frode.home.cern.ch/frode/crypto/BPAbwehr/g-312.zip (Cryptologia January 2000)

Posted the information above to the main page. Please contact me at the above email address if any concerns.Lossy 04:45, 12 June 2007 (UTC)[reply]

Citing References

It seems we have been marked as not citing references. I will attempt to learn how to do this properly and then remove the banner from above. Lossy (talk) 00:54, 24 July 2008 (UTC)[reply]

References

This is the references from the main enigma page many of them will apply, I will review and add as it seems fit. Lossy (talk) 00:57, 24 July 2008 (UTC)[reply]

References

Bauer, F. L. (2000). Decrypted Secrets (Springer, 2nd edition). ISBN 3-540-66871-3
Hamer, David H.; Sullivan, Geoff; Weierud, Frode (July 1998). "Enigma Variations: an Extended Family of Machines", Cryptologia, 22(3). Online version (zipped PDF).
Stripp, Alan. "The Enigma Machine: Its Mechanism and Use" in Hinsley, F. H.; and Stripp, Alan (editors), Codebreakers: The Inside Story of Bletchley Park (1993), pp. 83–88.
Kahn, David (1991). Seizing the Enigma: The Race to Break the German U-Boats Codes, 1939-1943 ISBN 0 395 42739 8.
Kozaczuk, Wladyslaw. The origins of the Enigma/ULTRA
Kruh, Louis; Deavours, Cipher (2002). "The Commercial Enigma: Beginnings of Machine Cryptography", Cryptologia, 26(1), pp. 1–16. Online version (PDF)
Marks, Philip; Weierud, Frode (January 2000). "Recovering the Wiring of Enigma's Umkehrwalze A", Cryptologia 24(1), pp55–66.
Smith, Michael (1998). Station X (Macmillan) ISBN 0-7522-7148-2
Ulbricht, Heinz. Die Chiffriermaschine Enigma — Trügerische Sicherheit: Ein Beitrag zur Geschichte der Nachrichtendienste, PhD Thesis, 2005. Online version.(in German)

Lossy (talk) 00:57, 24 July 2008 (UTC)[reply]

Rotor offset section

There have been several reverts of the Enigma rotor details#Rotor offset section.[1]

The section is poor; it uses the informal "we". It refers to wiring that has not been introduced yet, and it refers to "Wide B".

The section is confused: "In order to understand the effect of rotation on the rotors". The rotation of the rotors does not affect the rotors; the rotation affects the resulting permutation, but that is a topic for the Enigma machine and not a detail about specific rotors.

The section is repeat of the simpler diagram in the proceeding section. That section could have some text explaining how the rotors change the permutation. The example should use the same rotor wiring as in the illustration.

For now, I'd just delete the entire section.

Glrx (talk) 18:34, 27 June 2016 (UTC)[reply]

Ring setting section

The current description seems wrong to me.

From what I understand of the Enigma, the Ring settings are meant to function like this:

Ring setting

The ring settings, or Ringstellung, are used to change the position of the internal wiring relative to alphabet ring. Because the notch is fixed to the alphabet ring, the ring setting determines in which position the rotor will turn the next rotor.

The ring setting will rotate the wiring. Where rotor I in the A-position normally encodes an A into an E, with a ring setting offset of C (i.e. 2 positions shifted) it will C into G.

Changing the ring setting will therefore change the positions of the wiring, relative to the turnover-point and start position.

On the 3rd rotor, the notch of the alphabet ring is not used. Its setting must be respected, because the ring setting, in combination with the rotor setting, specifies the start position of the internal wiring.

--J c stuifbergen (talk) 06:43, 26 April 2021 (UTC)[reply]

Incorrect examples

Examples are calculated with incorrect rotor order. In text it’s assumed 123R, but actually used were 321R.