Example: air traffic controller
Cryptology for Beginners - MasterMathMentor.com
Cryptology for Beginners - 3 - www.mastermathmentor.com - Stu Schwartz Ciphertext - the secret version of the plaintext. So the plain text: iwillmeetyouatfivepminthemall may be changed to: NBNQQRJJYDTZFYKNAJURNSYMJRFQQ To make reading the ciphertext easier, the letters are usually written in blocks of 5.
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