A sample 'Periodical Cipher' book. This 'n-up' book by WebAmphibian.Com explains a very simple 'paper and pencil' encryption algorythm called the 'Periodical Cipher.' It is suitable for printing on any color printer (duplexing is a plus).

This cipher is called a "substitution" cipher, because the words or letters of the plain text are substituted by the encryption key for communication.

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spacer   Steps to Assembly

Print the page Cut the page up Make them the same size Order the pages Fold and staple

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