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One-Time Pad
An extremely powerful type of substitution cipher that uses a different key for each message. The key length is the same length as the message.
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Cipher that uses an encryption algorithm to replace each character or bit of the plain-text message with a different character, such as a Caesar cipher.
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Cipher that uses an encryption algorithm to rearrange the letters of a plain-text message to form the cipher-text message.
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A device that implements a 26-character modulo 26 substitution cipher. It functions as a one-time pad.
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A simple three-position shifting monoalphabetic substitution cipher employed by Julius Caesar.
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A polyalphabetic substitution cipher.
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