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A Novel Feistel Cipher Involving a Bunch of Keys Supplemented with XOR OperationKeywords: encryption , decryption , cryptanalysis , avalanche effect , multiplicative inverse. Abstract: In this investigation, we have developed a novel block cipher by modifying classical Feistel cipher. In this, we have used a key bunched wherein each key has a multiplicative inverse. The cryptanalysis carried out in this investigation clearly shows that this cipher cannot be broken by any attack.
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