P. Chenna Reddy

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Ad hoc wireless multi-hop networks (AHWMNs) are communication networks that consist of wireless nodes, placed together in an ad hoc manner, i.e. with minimal prior planning. All nodes in the network have routing capabilities and forward data packets for other nodes in multi-hop fashion. AHWMNs pose substantially different challenges to routing protocols(More)
This paper presents a robust and blind watermarking scheme for copyright protection of images in discrete wavelet transform domain based on the support vector machines (SVMs). This scheme is based on the relation between the coefficients in various sub bands in discrete wavelet transform decomposition. The proposed scheme is very secured and robust to(More)
Genetic Algorithm is proposed. The proposed scheme is based on quantization step size optimization using the Genetic Algorithm to improve the quality of watermarked image and robustness of the watermark. Experimental results are compared with the proposed method and the algorithm proposed by Rui et al. in terms of Normalized Cross correlation (NC) and Peak(More)
Least Significant Bit (LSB) Steganography is a method for hidden information in such a way that can only be detected by its intended recipient. Steganography in Digital media becomes a challenging discipline, since the Human Auditory System (HAS) is highly sensitive. One of the main obstacles of the number of files hiding in Digital media is to develop a(More)
Today's large demand for internet applications requires data to be transmitted in a safe and secure manner. Data transmission in public communication system insecure because of interception and improper manipulation by eavesdropper. So the solution for this problem is Steganography, Steganography is the art of hiding one medium of information into another(More)
This paper proposes a novel image watermarking method in discrete wavelet transform domain using support vector machines. Reference and watermark images are used to modify the coefficients of the particular even and odd blocks of the wavelet transformed image. Good learning ability of SVMs are used to extract the watermark from the watermarked image even(More)