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Word: ciphertext (lookup in dictionary) (lookup stats)
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Usage:

Since "every letter has a cluster of preferred associations that constitute its most distinguishing characteristic," the next step is to set up a contact chart. This shows how often each letter precedes and is succeeded by each other letter. From this it is clear that N in the ciphertext stands for plaintext e: it is the most frequently used letter, and associates more often with more different characters than does any other letter...

Author: /time Magazine | Title: Books: HOW TO SOLVE A CIPHER | 2/16/1968 | See Source »

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