Information transmission and steganography p. 15 On the existence of perfect stegosystems p. 30 Towards multi-class blind steganalyzer for JPEG images p. 39 An efficient fingerprinting scheme with symmetric and commutative encryption p. 54 Collusion secure convolutional spread spectrum fingerprinting p. 67 Performance study on multimedia fingerprinting employing traceability codes p. 84 Regular...

The main problem encountered during multimedia transmission is its protection against illegal distribution and copying. One of the possible solutions for this is digital watermarking. Digital audio watermarking is the technique of embedding watermark content to the audio signal to protect the owner copyrights. In this paper, we used three wavelet transforms i.e. Discrete Wavelet Transform (DWT)...

A digital watermark is a kind of marker covertly embedded in a noise tolerant signal such as audio or image data. It is typically used to identify ownership of the copyright of such signal. "Watermarking" is the process of hiding digital information in a carrier signal. Embedding a digital signal (audio, video or image) with information which cannot be removed easily is called digital watermark...

Teleradiology plays a vital role in the medical field, which permits transmitting and imaging data over communication network. It ensures reliability provides convenient for clinical interpretation diagnostic purposes. The transmission of this network raises problems legal, ethical issues, privacy, copyright authenticity. protection images is significant issue field. Watermarking schemes are us...

A genetic algorithm based robust blind digital watermarking scheme is presented. Starting from a binary image (the original watermark), a genetic algorithm is performed searching for a permutation of this image which is as uncorrelated as possible to the original watermark. The output of the GA is used as our final watermark, so that both security and robustness in the watermarking process is i...

We have seen an explosion of data exchange in the Internet and the extensive use of digital media. Consequently, digital data owners can quickly and massively transfer multimedia documents across the Internet. This leads to wide interest in multimedia security and multimedia copyright protection. We propose a digital video watermarking algorithm, in which a novel DWTbased blind digital video wa...

Modern digital communication requires watermarking technique for copyright and user’s authentication purpose. In this paper, a blind digital watermarking technique has been proposed using Discrete Wavelet Transform (DWT) to embed information in midfrequency. Three chaotic variations of standard AES algorithm are used to shuffle the original pixel positions of watermark color image. The original...

In this paper a wavelet-based logo watermarking scheme is presented. The logo watermark is embedded into all sub-blocks of the LLn sub-band of the transformed host image, using quantization technique. Extracted logos from all sub-blocks are merged to make the extracted watermark from distorted watermarked image. Knowing the quantization step-size, dimensions of logo and the level of wavelet tra...

Digital Image Watermarking is the procedure of embedding message/information/logo into a digital image which may be used to verify its accuracy or the uniqueness of its user. The data is also passed in copy, if the image watermarked is to be copied. Too many Image watermarking methods have to be proposed in digital watermarking. We have study a variety of methods in this paper, the way to expre...

In digital imaging, visual data is massively accessed, distributed, manipulated and stored using communication and multimedia technology. To prevent unauthorized access, illegal copying and distribution, modern communication and multimedia systems utilize digital rights management (DRM) solutions to ensure media integrity, secure its transmission over untrusted communication channels and protec...