Digital image watermarking is the process of concealing secret information in a digital image for protecting its rightful ownership. Most of the existing block based singular value decomposition (SVD) digital watermarking schemes are not robust to geometric distortions, even if for some special distortions, such as multiples of 90◦ rotation of integers and image flipping, which change the locat...

Digital watermarking technique has been presented and widely researched to solve some important issues in the digital world, such as copyright protection, copy protection and content authentication. Several robust watermarking schemes based on vector quantization (VQ) have been presented. In this paper, we present a new digital image watermarking method based on SOFM vector quantizer for color ...

Protection of Medical image contents becomes the important issue in computer network security. Digital Watermarking has becomes a promising technique for medical content authentication, it allows to embed relevant information with the image, which provides confidentiality, integrity and authentication by embedding Digital Signature (DS) with the Medical image. In this paper we focus on need for...

Visual cryptography is an emerging cryptography technology that uses the characteristics of human vision to decrypt the encrypted images. Watermarking is a method in which an image or pattern is put on paper in the form of various shades of lightness/darkness especially when viewed by transmitted light. Digital watermarking where computer-aided information is used in the hiding information is o...

As the substantial challenge in providing security of digital images is owners authentication in many security schemes based on cryptography, steganography and watermarking technology, biometric recognition methods are introduced. In the sequel to these studies in presented methodology the combination of biometric recognition methods based on facial images with watermarking technology to perfor...

A digital watermark is a used for identification of embedded data in a noise tolerant signal such as image data. It is used to identify ownership of the data. "Watermarking" is the process of hiding digital information in a carrier signal. Embedding a digital signal is called as watermarking. Robust Watermark is well suited for copyright protection because they stay intact with image ...

Today, exchange of information is been held electronically. Digital data can be stored efficiently with a very high quality and it can be manipulated very easily using computers. Digital media offer several distinct advantages over analog media. Therefore, we have great need of secure transmission of the concerned data. Watermarking is used as a key solution to make the data transferring secure...

Digital Watermarking embeds identifying information in an image, which is not always hidden, in such a manner that it cannot easily be removed. This is used to identify the owner of the work, to authenticate the content, to trace illegal copies of the work. So many digital image watermarking techniques have been implemented to stop the illegal used of digital content. This correlation based wat...

The protection of the contents of digital products is referred to as content authentication. In some applications, to be able to authenticate a digital product could be extremely essential. For example, if a digital product is used as a piece of evidence in the court, its integrity could mean life or death of the accused. Generally, the problem of content authentication can be solved using semi...

The advancement in digital technologies have made it possible to produce perfect copies of digital content. In this environment, malicious users reproduce the digital content and share it without compensation to the content owner. Content owners are concerned about the potential loss of revenue and reputation from piracy, especially when the content is available over the Internet. Digital water...