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Steganography is the Art and Science of hiding the information and remarkable cover media. So, as not to arouse on Eaviesdropper's suspicion. In this paper, secret image is hide into two different domains like as IWT (Integer Wavelet Transform) and DWT (Discrete Wavelet Transform). The cover image and secret image co-efficient values are embedded by 512*512 using fusion process techniques. We applied...
Steganography enables to have a secret communication in modern information technology using public channel. In this paper, we propose Dual Transform Technique for Robust Steganography (DTTRS). The cover image is segmented into blocks of 4*4 each and Discrete Wavelet Transform (DWT) is applied on each block. In the resulting DWT coefficients, blocks of vertical band of 2*2 each are considered and Integer...
Digital watermarking is an effective and popular technique for discouraging illegal copying and distribution of copyrighted digital image information, which in turn provides an alternative solution for image authentication. This paper proposes an innovative watermarking scheme in which some pixels are randomly selected from original image, so that all of them have a valid 3 × 3 neighborhoods. A binary...
In recent years, digital watermarking technologies are considered to be important means to protect digital image copyrights. In this paper, we combine a non-invertible watermark scheme with an HVS model adaptive watermark. The application of adaptive watermarks improves visual imperceptibility. However, we find that an adversary is able to apply ambiguity attacks on the non-invertible watermark scheme...
While many watermarking methods show good robustness against common signal processing operations, security of the watermarking schemes under intentional attack exploiting knowledge of the implementation has been widely neglected. In this paper, we demonstrate straightforward, targeted attacks for a number of quantization based watermarking methods and provide implementations. The attacks require only...
A blind watermarking algorithm for color images based on DWT (discrete wavelet transform) and DFT (discrete Fourier transform) is presented in this paper. In the proposed algorithm, a color image is the host image and a meaningful binary image is the watermark to be embedded. The features of the proposed algorithm are as follows: (1) Color images other than gray images are used as host images. (2)...
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