A Modified Playfair Cipher for Encrypting Digital Images

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Safwat Hamad Amal Khalifa Ahmed Elhadad Saad Rida


In this paper, a new extension of the Playfair cipher algorithm is proposed to encrypt image data more securely. The proposed method constructs a 16×16 secret key matrix to scramble image data byte by byte. In addition, the algorithm complexity is increased using masking and XOR procedure. That is, the key is used to generate a mask that is subsequently XORed with the scrambled image. Experimental results showed that using two slightly different secret keys, the resultant encrypted images are still completely different.

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HAMAD, Safwat et al. A Modified Playfair Cipher for Encrypting Digital Images. Journal of Communications and Computer Engineering, [S.l.], v. 3, n. 2, p. 1-9, jan. 2014. ISSN 2090-6234. Available at: <http://m-sciences.com/index.php?journal=jcce&page=article&op=view&path%5B%5D=731>. Date accessed: 23 apr. 2017. doi: https://doi.org/10.20454/jcce.2013.731.