A homophonic cipher for computational cryptography

Abstract

,A simple enciphering technique that can be used to encode sensitive l data in computer systems is described. This cipher has properties that make it possible to do editing on data within the computer without decoding.Thus, the key need not be available to the computer nor anyone who has access to the computer system since the data can ea sily enter and leave the system in ciphered form. It need only appear deciphered at its origin or its destination by use of a very simple ciphering procedure.

Intelligent Techniques in Cryptanalysis: Review and Future Directions

“…Substitution ciphers can be classified into sub classes as follows: [3], [9] • Monoalphabetic substitution ciphers: In this type of encryption techniques, one letter of plaintext is represented by one letter in ciphertext, and one ciphertext letter represents one and only one plaintext letter, so it is the simplest form of substitution techniques. Monoalphabetic substitution includes direct monoalphabetic, reversed monoalphabetic, decimated monoalphabetic, and mixed monoalphabetic ciphers • Polyalphabetic substitution ciphers: In this type of encryption, one letter of plaintext is represented by multiple ciphertext letters, and one ciphertext letter represents multiple plaintext letters.…”