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An Effective Algorithm of Encryption and Decryption of Images Using Random Number Generation Technique and Huffman coding

Author(s): Dr. T. Bhaskara Reddy | Hema Suresh Yaragunti | T. Sri Harish Reddy | Dr. S. Kiran

Journal: International Journal of Computer Technology and Applications
ISSN 2229-6093

Volume: 04;
Issue: 06;
Start page: 883;
Date: 2013;
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Keywords: Encryption | Decryption | Random generation technique | Exception law | Random row transposition

Data security has become most important aspect while transmission of data and storage. The transmission and exchange of image also needs a high security. Cryptography is used to maintain security. In this paper, we implemented security for image. We have considered an image, read its pixels and convert it into pixels matrix of order as height and width of the image. Replace that pixels into some fixed numbers, generate the key using random generation technique .Encrypting the image using this key ,performing random transposition on encrypted image, converting it into one dimensional encrypted array and finally applied Huffman coding on that array , due this size of the encrypted image is reduced and image is encrypted again .The decryption is reverse process of encryption. Hence the proposed method provides a high security for an image with minimum memory usage.
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