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In this paper, we have developed a block cipher by extending the analysis of a Novel Block Cipher Involving a Key bunch Matrix and a Key-based Permutation and Substitution. Here we have include and additional key matrix, which is supplemented with xor operation. The cryptanalysis carried out in this investigation clearly indicates that this cipher cannot be broken by any attack.

international journal of advanced computer science and applications/international journal of advanced computer science and applications

A Block Cipher Involving a Key Bunch Matrix and an Additional Key Matrix, Supplemented with Xor Operation and Supported by Key-Based Permutation and Substitution