文章基本信息

标题：LSB and MSB Based Steganography for Embedding Modified DES Encrypted Text
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作者：Prashanti .G ; Sandhya Rani.K ; Deepthi.S 等
期刊名称：International Journal of Advanced Research In Computer Science and Software Engineering
印刷版ISSN：2277-6451
电子版ISSN：2277-128X
出版年度：2013
卷号：3
期号：8
出版社：S.S. Mishra
摘要：Now a day's Secure Transmission of data is very important because of high rates of data theft and interception. This work deals with one of the encryption methodology i.e. modified data encryption standard algorithm that encrypts original text into insensible text (cryptography)and to make data more secure, the text is embedded into an image(steganography) .This means the text will not be visible to any one that intercepts this image. The modified DES here introduces a new method to enhance the performance of the Data Encryption Standard (DES) algorithm. This is done by replacing the 8×32 S-Box instead of 6×4 S-Box. The output of each S-Box undergoes AND and XOR operation before going to the permutation P. In this paper we also proposed a new operation Addition modulo instead predefined XOR operation applied during the 16 round of the standard algorithm which results a Cipher text. This cipher text is embedded into an image using the two techniques, LSB (Least Significant Bit) based steganography and MSB (Most Significant Bit) based steganography. The main advantage of this method is that if someone (hacker) wants to get the information at first the hacker should extract the cipher text from the image. This step is itself quite difficult and there is another security barrier of decrypting the cipher text to original text
关键词：DES; Encryption; Decryption; asymmetric cryptography; symmetric cryptography; image embedding; ;steganography; LSB and MSB based steganography; grayscale images