文章基本信息

标题：Wavelet based Non LSB Steganography
本地全文：下载
作者：H S Manjunatha Reddy ; K B Raja
期刊名称：International Journal of Advanced Networking and Applications
电子版ISSN：0975-0290
出版年度：2011
卷号：3
期号：3
页码：1203-1209
出版社：Eswar Publications
摘要：Steganography is the methods of communicating secrete information hidden in the cover object. The messages hidden in a host data are digital image, video or audio files, etc, and then transmitted secretly to the destination. In this paper we propose Wavelet based Non LSB Steganography (WNLS). The cover image is segmented into 4*4 cells and DWT/IWT is applied on each cell. The 2*2 cell of HH band of DWT/IWT are considered and manipulated with payload bit pairs using identity matrix to generate stego image. The key is used to extract payload bit pairs at the destination. It is observed that the PSNR values are better in the case of IWT compare to DWT for all image formats. The algorithm can't be detected by existing steganalysis techniques such as chi-square and pair of values techniques. The PSNR values are high in the case of raw images compared to formatted images
关键词：Cover Image; DWT; Multiplier; Payload; Steganography; IWT