G Enigma cipher machine challenge

Enigma Model I cipher machine challenge


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The Enigma Model I is the most common Enigma machine. It was used by the German military forces: by the Wehrmacht (The Heer [army] and the Luftwaffe [air force]) since 1932 and by the Kriegsmarine [Navy] (under the name of M1, M2 or M3) later.

It was developed in 1927 as the successor of model D. The machine has Three rotors. The reflector is fixed (it is mobile in model D) but the addition of a Plugboard is an important improvement.

Problems (notes)

1st Problem
(very easy)
Luigi Tomelli
01/11/18
Uwe B
26/02/19
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2nd Problem
(middle)
G. Lasry
15/07/17
Luigi Tomelli
16/11/18
Uwe B
26/02/19
. . . . . . . . .
3rd Problem
(middle)
G. Lasry
15/07/17
Luigi Tomelli
16/11/18
. . . . . . . . . .
4th Problem
(difficult)
G. Lasry
15/07/17
Luigi Tomelli
16/11/18
. . . . . . . . . .
5th Problem
(middle)
G. Lasry
15/07/17
Luigi Tomelli
16/11/18
. . . . . . . . . .
6th Problem
(hard)
G. Lasry
17/01/19
. . . . . . . . . . .
7th Problem
(hard)
G. Lasry
14/01/19
. . . . . . . . . . .
8th Problem
(hard)
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9th Problem
(hard)
G. Lasry
12/01/19
. . . . . . . . . . .
10th Problem
(hard)
. . . . . . . . . . . .
11th Problem
(medium)
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12th Problem
(medium)
. . . . . . . . . . . .