Caesar Cipher
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The Caesar Cipher, named after Julius Caesar, is an ancient encryption/decryption technique that shifts the alphabetical position of every letter in a message by a specified amount, or key. Encrypted messages can be sent by the sender to other receivers to be decrypted as long as the two parties agree on a numbered key first. Although a very insecure method of encryption by today's standards, users can have fun sending and receiving encrypted messages using this extension.
