The intriguing characteristics of chaotic maps have prompted researchers to use these sequences in watermarking systems to good effect. In this paper we aim to use a tent map to encrypt the binary logo to achieve a like-noise signal. This approach makes extraction of the watermark signal by potential attacker very hard. Embedding locations are selected based on certain principles. Experimental ...

In this paper, we propose a new method for watermarking electronic text documents that contain justified paragraphs and irregular line spacing. The proposed method uses a spread-spectrum technique to combat the effects of irregular word or line spacing. It also uses a BCH (Bose-Chaudhuri-Hocquenghem) error coding technique to protect the payload from the noise resulting from the printing and sc...

Research in digital watermarking is mature. Several software implementations of watermarking algorithms are described in the literature, but few attempts have been made to describe hardware implementations. The ultimate objective of the research presented in this paper was to develop low-power, highperformance, real-time, reliable and secure watermarking systems, which can be achieved through h...

Both encryption and digital watermarking techniques need to be incorporated in a digital rights management framework to address different aspects of content management. While encryption transforms original multimedia object into another form, digital watermarking leaves the original object intact and recognizable. The objective is to develop low power, real time, reliable and secure watermarkin...

Image watermarking is a signal that is embedded in a image data permanently such that it can be extracted by dewater marking using some operations for checking the authenticity of data or user. The watermark is inseparable from the host image and it should be robust enough to resist any modifications along with preserving the image quality. In this way the watermarking helps in keeping intellec...

Embedding a digital signal with information which cannot be removed easily is called „Digital watermarking‟. In visible watermarking of images, a secondary image is embedded in a primary image such that watermark is intentionally perceptible to human observer.The present work aims at visible watermarking algorithm based on luminance parameters in DCT domain. Visible watermarking is a type of di...

We introduce a notion of watermarking for cryptographic functions and propose a concrete scheme for watermarking cryptographic functions. Informally speaking, a digital watermarking scheme for cryptographic functions embeds information, called a mark, into functions such as one-way functions and decryption functions of public-key encryption. There are two basic requirements for watermarking sch...

For healthcare applications, a hybrid multiple watermarking has been projected in this paper. For authentication and identity purpose, the projected scheme makes use of two watermarks, one in the form of text watermark which includes diagnostic information of the patient and the other image watermark includes the hospital logo. In order to improve the robustness performance of the scheme DWT, D...

All sorts of information today is getting digitized and internet among others is the easiest and a very effective source and host for sharing data. So, it becomes very important to track, protect and monitor the data and maintain its security, confidentiality, data integrity, authentication, robustness and ownership. And, techniques like steganography, watermarking and cryptography help us to d...

Steganography is the process of hiding one medium of communication (text, sound or image) within another. This paper will discuss the tools used to both hide and unhide (know as Steganalysis) information. A look at the history starting with Herodotus in ancient Greece describing secret messages written in wax on stone tablets, to world war two’s secret double meaning Nazi messages and British I...