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Advanced Hill Cipher Involving Permutation and Iteration

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Author(s): V.U.K.Sastry | Aruna Varanasi | S.Udaya Kumar

Journal: International Journal of Advanced Research in Computer Science
ISSN 0976-5697

Volume: 01;
Issue: 04;
Start page: 141;
Date: 2010;
Original page

Keywords: permutation | iteration | involutory | matrix | key | ciphertext | modular | arithmetic | cryptanalysis.

ABSTRACT
In this Paper we have developed a block cipher which depends upon iteration and permutation. In this we have used an involuntary matrix ( a matrix whose inverse is the same as the matrix) wherein the elements of the matrix depend upon the key chosen by us for encryption as well as decryption. As the permutation plays a prominent role in dissipating the characteristic features of the plaintext and the key, the strength of the cipher is found to be enhanced significantly. In this analysis obtaining the involutory matrix involves advanced concepts and elementary operations and hence obtaining it has become very simple. The avalanche effect and the cryptanalysis have clearly indicated that this cipher is a strong one.
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