文章基本信息

标题：An Effective Algorithm of Encryption and Decryption of Images Using Random Number Generation Technique and Huffman coding
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作者：Dr. T. Bhaskara Reddy ; Hema Suresh Yaragunti ; T. Sri Harish Reddy 等
期刊名称：International Journal of Computer Technology and Applications
电子版ISSN：2229-6093
出版年度：2013
卷号：4
期号：6
页码：883-891
出版社：Technopark Publications
摘要：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.Key words
关键词：Encryption; Decryption; Random generation technique; Exception law; Random row transposition