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Volume 7 | Issue 1 | Year 2017 | Article Id. IJPTT-V7I1P403 | DOI : https://doi.org/10.14445/22492615/IJPTT-V7I1P403

Avalanche Effect based Variants of Playfair Cipher for Data Security

Rajeswari.S, Ramya.N, K.Saranya

Citation :

Rajeswari.S, Ramya.N, K.Saranya, "Avalanche Effect based Variants of Playfair Cipher for Data Security," International Journal of Computer Trends and Technology (IJCTT), vol. 7, no. 1, pp. 10-14, 2017. Crossref, https://doi.org/10.14445/22492615/IJPTT-V7I1P403

Abstract

Cryptography is the technique of converting original message into non-readable form. It is further classified as Transposition technique and Substitution technique. One of the commonly used substitution technique is Playfair cipher. It is a form of block cipher which operates on block of characters, considering two characters at a time. One of the important considerations for measuring the strength of any cryptographic algorithm is its Avalanche effect, (i.e.) if an input is changed slightly, the output changes significantly. A good algorithm must have high Avalanche Effect. The traditional 5 x 5 Playfair cipher supports twenty five uppercase alphabets only. To overcome this drawback, extended Playfair ciphers were proposed. This paper deals with the study of these on the basis of Avalanche effect.

Keywords

Cryptography, Substitution, Playfair Cipher, Avalanche effect.

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