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What Is Shift Ciphers Encoded Message Notes

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Shift (Caesar) Ciphers If you have a message you want to transmit securely, you can encrypt it (translate it into a secret code). One of the simplest ways to do this is with a shift cipher. Famously, Julius Caesar used this type of cipher when sending messages to his military commanders. A shift cipher involves replacing each letter in the message by a letter that is some fixed number of positions further along in the alphabet. We’ll call this number the encryption key. It is just the length of the shift we are using. For example, upon encrypting the message “cookie” using a shift cipher ...
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