What do you mean by substitutional ciphers, Computer Networking

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Q. What do you mean by Substitutional Ciphers?

Substitutional Ciphers

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Monoalphabetic Substitution

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Polyalphabetic Substitution

- Transpositional - characters retain their plaintext form but change their positions to create ciphertext.

- Text is organized into a two-dimensional table and columns are interchanged according to a key.

- Character frequencies are still preserved, however.


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