The translated 1940 Enigma General Procedure Page 15

Tony Sale's Codes and Ciphers

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M.Dv. 32/1.

15



Practical Method of Deciphering




71. Check the Radio Indicator Groups to see that the beginning

ones and end ones are identical.



72. Decipher the Radio Indicator Groups according to cipher

procedure for indicator groups in the K-Book and enter the Cipher
Indicator Group as the first Book Group and the Procedure Indicator
Group as the second. Look up the meaning of the Indicator Groups
in the K-Book and then cross out the beginning and end groups
(Radio Groups).



73. Set in the Cipher of the day (including basic settings) and

push down the keys bearing the letters of the Procecure Indicator
Group (Book Group) once. The result is the Message Cipher.



74. Set in the Messsage Cipher and decipher the Radio Groups

consecutively from the third line on. Enter the resulting letters
in four-letter groups, one group to a line, in the "Book Group"
column, writing from left to right.


75. Reproduce the abbreviated plain text of tbe "Book Group"

column in the column labelled "Meaning" (Bedeutung).




76. Look up the address and signature in the Radio Name List

(Funknamenliste). (Only in the case of General Radio Procedure).


(Translator's Note: Confusion of the two following terms is

to be avoided:.

Schluesselverfahren M Allgemein: Enigma General Procedure,
or General Enigma Procedure -- as opposed to Officer and
Staff.

Allgemeines Funkverfahren: General Radio Procedure, or
General Procedure -- as opposed, for examule, to Fleet
Procedure, Acknowledgment Procedure, and so on. See NV-2.


- Tr.)



TREATMENT OF MESSAGE ACCORDING


TO ENIGMA OFFICER AND STAFF PROCEDURES




81. For the cipher work to be done by the officer, see the manual

entitled "Enigma Officer and Staff Procedures" ("Der Schluessel M
Verfahren M Offizier und M Stab") -- M.Dv. 32/2.





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