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jdege
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Donald
May 13 2008, 11:23 AM
But for regular old vig, working them completely by hand is certainly possible, but involves way to much counting to be "fun" in my book.

The old-timers had tools to make things easier. Strips of wood or cardboard with the alphabet, for example. You could lay them out one above the other, and shift them relative to each other so that one column gave you one slice's ciphertext. You could then read every other possible shift in the other columns.
Code:
 

 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A B C D E F ...
 W X Y Z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A B C ...
 O P Q R S T U V W X Y Z A B C D E F G H I J K L M N O P Q R ...
 U V W X Y Z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...

If you had enough practice, you could pick out the column that had the highest -frequency of high-frequency letters almost instantaneously.

But it takes a lot of tedious work, to have had enough practice.
When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.
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