Design and Analysis of Modified Playfair Square Cipher Algorithm Using 6 By 6 Matrix with Five Iteration Steps and its Implementation in C/C++
International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
www.ijsr.net | Open Access | Fully Refereed | Peer Reviewed International Journal

ISSN: 2319-7064



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Research Paper | Computer Science & Engineering | India | Volume 4 Issue 6, June 2015

Design and Analysis of Modified Playfair Square Cipher Algorithm Using 6 By 6 Matrix with Five Iteration Steps and its Implementation in C/C++

Monika Arora, Anish Sandiliya

An ad-hoc network generally consists of nodes, on which sensors are embedded to provide security measures. The main challenge of these sensors is to provide security of data and also to work effectively within a limitation of power and memory. This paper is a step toward developing an encryption system which can encrypt any text messages securely. Cryptography is an art and science of converting original message into no readable form. There are two techniques for converting data into no readable form. Transposition technique, Substitution technique. In recent years there is drastic progress in Internet world. Sensitive information can be shared through internet but this information sharing is susceptible to certain attacks. Cryptography was introduced to solve this problem. Cryptography is art for achieving security by encoding the plain text message to cipher text. Substitution and transposition are techniques for encoding. When Caesar cipher substitution, Rail fence cipher and Columnar Transposition Cipher techniques are used individually, cipher text obtained is easy to crack. This Paper will present a perspective on combination of techniques like substitution and transposition with play fair square cipher to enhance its security. Play fair cipher is one of the popular symmetric encryption methods. The first recorded description of the Playfair cipher was in a document signed by Wheatstone on 26 March 1854. However Lord Playfair promoted the use of this cipher and hence it is called Playfair Cipher. It was used by the British in the Second Boer War and in World War I. It was also used by the Australians and Germans during World War II. Playfair is reasonably easy to use and was used to handle important but non-critical secrets. By the time the enemy cryptanalysts could break the message, the information would be useless to them. Between February 1941 and September 1945 the Government of New Zealand used it for communication between New Zealand, the Chatham Islands and the Pacific Islands. To enhance its security we combine it with transposition and substitution cipher techniques, to minimize attacks on it (Cryptanalyst), by performing double substitution and transposition Techniques. There are two main disadvantages of traditional play fair cipher matrix. First one is we have to compromise between I and J and second one is we cannot include numeric values in this matrix. This matrix consists of alphabets A to Z and numeric values 0 to 9. Here we use Five Iteration steps to make strong encrypted message.

Keywords: Caesar cipher, Play fair cipher, key, columnar transposition, cryptography, cryptanalysis, C/C++

Edition: Volume 4 Issue 6, June 2015

Pages: 1613 - 1619

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How to Cite this Article?

Monika Arora, Anish Sandiliya, "Design and Analysis of Modified Playfair Square Cipher Algorithm Using 6 By 6 Matrix with Five Iteration Steps and its Implementation in C/C++", International Journal of Science and Research (IJSR), https://www.ijsr.net/search_index_results_paperid.php?id=SUB155487, Volume 4 Issue 6, June 2015, 1613 - 1619

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