Improvement of Security in Playfair Cipher
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Abstract
There are many drawbacks inherent in the NXN Playfair cipher and the security level is not good. In this paper, a logical operation has been performed between key and output of Playfair algorithm. It has been observed that the drawback of the existing Playfair cipher has been improved using proposed method.
Keywords: Playfair Cipher, Plain Text, Key, Middle Text, Cipher Text, Effective Key.
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