Apendix

Wiring

Wiring of Enigma Wheels [I - VIII, Beta and Gamma] 

         Wheel          Wiring              Notch   Turnover

          No.   ABCDEFGHIJKLMNOPQRSTUVWXYZ

           I    EKMFLGDQVZNTOWYHXUSPAIBRCJ    Y        Q

          II    AJDKSIRUXBLHWTMCQGZNPYFVOE    M        E

         III    BDFHJLCPRTXVZNYEIWGAKMUSQO    D        V

          IV    ESOVPZJAYQUIRHXLNFTGKDCMWB    R        J

           V    VZBRGITYUPSDNHLXAWMJQOFECK    H        Z

          VI    JPGVOUMFYQBENHZRDKASXLICTW    H,U      Z,M

         VII    NZJHGRCXMYSWBOUFAIVLPEKQDT    H,U      Z,M

        VIII    FKQHTLXOCBJSPDZRAMEWNIUYGV    H,U      Z,M

        Beta    LEYJVCNIXWPBQMDRTAKZGFUHOS    M-4 only

        Gamma   FSOKANUERHMBTIYCWLQPZXVGJD    M-4 only 

           UKW           

          B         YRUHQSLDPXNGOKMIEBFZCWVJAT          

          C         FVPJIAOYEDRZXWGCTKUQSBNMHL

   `Thin' B     ENKQAUYWJICOPBLMDXZVFTHRGS      M4 only

   `Thin' C     RDOBJNTKVEHMLFCWZAXGYIPSUQ      M4 only

 

1: Notch: location of notch on the index ring.

2: Turnover: letter appearing in window when the notch

         is engaged with the stepping lever.

3: Wheels Beta and Gamma have index rings but no notches.

4: 'Thin' reflectors B and C are used only in the Model

         M-4 with Beta and Gamma wheels.

Glossary

English	German
BP	Bletchley Park
Decipher	transform a cipher text into plain language
Eintrittwalze	entry wheel (stator)
Encipher	transform a plain language text into cipher.
Greek	wheels Beta and Gamma [for obvious reasons] used in the M4
Grundstellung	ground setting
Machine period	number of keystrokes for a complete machine cycle
Ringstellung	ring setting
Rotor	wired wheel [wheel was commonly used at BP]
Scrambler	consists of the entry stator, moving wheels and the reflector.
Self steckered character	a letter that is not 'switched' in the plugboard
Stecker	plug
Steckerbrett	plugboard [sometimes referred to as "Stecker board"]
'Thin' reflectors	reflectors used with the 'Greek' wheels of the M4.
Umkehrwalze	reflector
Walzen	wheels
Walzenlage	wheel order

Recomended readings

Books

1) ``Geheimoperation Wicher'', Wladyslaw Kozaczuk

2) ``Station X - The Codebreakers of Bletchley Park'', Micael Smith

3) ``Turings Treatise on Enigma'', Dr. Alan Turing

5) ``Abenteuer Kryptologie'', Reinhard Wobst

Videos

1) ``Operation Enigma'', BBC Serie - ``Die Geheimnisse des II Weltkriges'', Folge 6

2) ``Die Entschlüsselung des Enigma-Codes'',Time Life Video + BBC,''Geheimakte 2. Weltkrieg''

Else

1) Various resources from the Internet.