January 2011
Beginner to intermediate
104 pages
5h 19m
English
book
Cryptologic Aspects of German Intelligence Activities in South America during World War II
by David P. Mowry
Content preview from Cryptologic Aspects of German Intelligence Activities in South America during World War II
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Page 81
Cryptologic Aspects of German Intelligence Activities in South America during World War II
The plain text was divided into five-letter
groups and the following substitution was made
group by group:
The letter J was left plain in all positions. Thus,
MESSAGE would become ZMTLA TM....
In the first transposition rectangle all squares
in the first line to the left of the number corre-
sponding to the date of encipherment were blocked
out. In the second rectangle, the same was done to
the first line squares to the left of the number cor-
responding to the month of encipherment.
The Kryha Machine
The Kryha machine was a
clockwork-powered mechani ...
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