Questions tagged [enigma]
The Enigma Machine was a piece of cryptographic hardware used by the German military during World War II; successful cryptanalysis was routinely applied against it and the scheme was considered broken. Questions relating to this machine should use this tag and you may also which to use the historic tag.
91 questions
1
vote
1
answer
165
views
Permutations of Enigma Rotor Wiring
This is a simple question: How many different 26 position Enigma Rotors are possible? NOT including any other Enigma elements such as the plugboard, the reflector, starting positions ring settings, ...
4
votes
1
answer
120
views
Banburismus and Bonus Scoring System
I have been reading about the use of Banburismus by Bletchley Park cryptographers to deduce possible/probable wheel orderings of the Naval Enigma (and even generate menus from such analysis). For each ...
1
vote
2
answers
245
views
Is it obvious that if Enigma Ring settings are displayed in the Indicator Windows, the Enigma will encode identically up until a turnover?
Analysis of Enigma rotors show that the 'ring' setting aligns the 'ring' letter with the 'A' pin of the rotor. And based on the design of the Enigma, the 'A' contact of the Entry Wheel ETW is aligned ...
- 11
2
votes
3
answers
309
views
Discrepancy Regarding Stop Criteria of the Turing-Welchman Bombe
I have been studying the Turing-Welchman Bombe for a bit over a year now and one question seems to find very inconsistent answers depending on where you look. In 2015, someone asked "under what ...
3
votes
1
answer
111
views
Railway enigma rotor question (Bletchley vs found rotors)
I've noticed something confusing about the Railway/Rocket enigma rotors as described by Turing in his papers and as recovered recently (2023) at auction of an authenticated "Railway" enigma.
...
- 51
0
votes
0
answers
79
views
Order of Enigma's rotors does not increase total number of keys
I have a question about “order of rotors”. I read about Enigma but I do not understand this point. If the machine has 3 rotors, for example 1_2_3, so it has 26×26×26 total keys. If we change the ...
- 27
1
vote
1
answer
375
views
The purpose of Enigma plugboard
It is well known the number of Enigma combinations with plugboard:
$${5!\over(5-3)!}\cdot26^3\cdot{26!\over(26-20)!\cdot2^{10}\cdot10!}=158,962,555,217,826,360,000$$.
So, $(26-20)!\cdot2^{10}\cdot10!$ ...
0
votes
1
answer
139
views
Enigma Implementation Question
How do rings affect encryption?
My current understanding is that it is just an offset, but I am having difficulty understanding the output of a test case.
...
- 1
1
vote
1
answer
103
views
Enigma machine Rejewski cataluge and ring settings
I'm trying to simulate Rejewski cyclometer and developed a code that run over all ~100k posibilities and generates for each setting an id that looks like that: 1313_111212_11221010
I run my code with ...
- 11
1
vote
0
answers
48
views
Fitness of Text Function, did I spot an error?
I am playing around with Enigma Encryption, and especially solving it piece-wise, like in https://www.youtube.com/watch?v=RzWB5jL5RX0 shown. The idea is, that the text gets clearer, if you get more ...
- 181
-1
votes
4
answers
469
views
Enigma encryption
I know how an Enigma works and that the reflector means a current flow must return by a different route but my question is this. After returning from the reflector and through the rotors, it passes ...
- 1
0
votes
0
answers
185
views
Enigma - Bombe - Understanding the relative values of ring settings to key settings
For a project, I am writing Enigma and Bombe simulators in Python.
I have coded up both and so far so good.
My Enigma simulator gives the same results as the online simulator here:
https://people....
3
votes
2
answers
403
views
Why isn't my Enigma simulator working?
I am attempting a to simulate an 'Enigma M3' machine. As I understand it, the M3 is internally wired as:
Name
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Notch
I
EKMFLGDQVZNTOWYHXUSPAIBRCJ
Y
II
...
- 131
3
votes
0
answers
146
views
Effective key length in Enigma encryption
Each Enigma machine setting induces a certain encryption in the sense of a function from the space of plain texts to the set of cipher texts.
The number of different Enigma machine settings can be ...
- 139
1
vote
1
answer
227
views
Enigma Questions: Eliminating the can't encode to itself flaw? Maybe not a flaw
I am currently writing a paper in my old age for the fun of it. I feel that the enigma machine had gotten a bad wrap for some of its flaws. I decided to write a machine simulation to see if I can ...
