The translated 1940 Enigma General Procedure Page 8

Tony Sale's Codes and Ciphers

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M.Dv. 32/1.

8


Making Messages Longer


31. The regulations about treatment of texts, either of regular

radio messages or of those which are enciphered according to various
cipher procedures or cipher memoranda, are expanded by the regula-
tions here following.


32. Messages are made to vary in length by adding letters and

words at the end.

Directly following upon the last word of the plain text to

be encichered, three or four identical bigrams are to be added,
and then after them one or more generally-known random words of
neutral content, e.g Wassereimer, Fernsprecher, Eichbaum, Dachfirst,
Kleiderschrank, (water pail, telephone, oak tree, roof ridge,
wardrobe) and the like. For example:


...ABGESUCHT KB KB KB GARDEROBENSTANDER.


Words which are contrary to good breeding and good order,

personal communications, and the like, are forbidden. In choosing
these words and the repeated bigrams care is to be taken thst they
cannot be connected in any way with the actual text of the message.


33. The purpose of using well known words of the German language

for padding is to give the cipherer a guarantee that he has de-
ciphered correctly.


Padding and Separation of Groups



34. The plain text prepared according to the foregoing regulations

is divided up by letters into four-letter groups and entered on
the cipher form into the column entitled "Book Groups", writing
from left to right.


35. If the last group contains fewer than four letters, it is to

be padded to four letters with any consonants before being enciphered.
Care is to be taken here that no misunderstandings are possible;
it is especially important to avoid using customary final syllables.


Padding with text aids and procedure signs of the radio service

or with any other usual abbreviations or with punctuation marks is
forbidden.


Subdivision of Messages.


36. In order not to delay the process of enciphering and deciphering,

it is sometimes necessary to divide a message, if it is long, into
two or more separate messages. In this case the word "FORT"
(standing for "Fortsetzung" = "continuation") is to be inserted
somewhere in the last third of every messsge division except the
last. In the first third of the second message division, and of
every one thereafter, the word "FORT" is likewise to be inserted,
in this case followed by the time group of the preceding message
division belonging to it. Care is to be taken that time groups,
after being enciphered, do not get altered.



37. For enciphering and deciphering message divisions, several

cipher groups are to be used at the same time, whenever possible.
The chronological order of the time groups does not need to correspond




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