A Modern Hill Cipher Involving a Pair of Keys, Modular Arithmetic Addition and Substitution

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Aruna Varanasi
V. U. K. Sastry, S. Udaya Kumar


In this paper, we have developed a block cipher which involves a pair of keys. Here we have used iteration process which includes
functions mix() and substitute() in each round of the iteration process. Function mix() is used for mixing the binary bits of the plaintext, and
substitute() is employed for modifying the plaintext. The avalanche effect and the cryptanalysis carried out in this investigation indicate that this
cipher cannot be broken by easy means and it is a strong one.


Keywords: symmetric block cipher, cryptanalysis, avalanche effect, ciphertext, pair of keys, modular arithmetic addition, mixing, substitution.


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