This paper presents a new and comparatively secure watermarking technique, in the
frequency domain. Our scheme deploys a local ring-based substitution box (S-box). The …

With rapid growth in computer network and information technology, a large number of
copyrighted works now exist digitally as a computer files, and electronic publishing is …

One digital watermarking method, based on the spread spectrum technique, is described in
this paper. This method uses the frequency hopping spread spectrum in order to determine …

In this paper, a frequency domain watermarking algorithm for image and video is proposed.
By using a novel frequency division multiplexing structure, the information watermark and …

The robust watermarking scheme has very broad application scenarios. For robust
watermarking methods, the transform domain based watermarking algorithms are popular …

A robust watermark should be able to withstand most image manipulations such as
cropping, additive noise and JPEG type compressions. It should also be able to hold telltale …

Watermarking is a technology that complements cryptography by embedding imperceptible
signals in work. Information hiding techniques have recently become important in a number …

In this study, we propose a new spread spectrum image watermarking algorithm that
embeds linear chirps as watermark messages. The slopes of the chirp on the time-frequency …

An image watermarking scheme that combines Hermite functions expansion and
space/spatial-frequency analysis is proposed. In the first step, the Hermite functions …

Physical layer security mechanisms have drawn increasing research interest recently along
with the development of software defined radio (SDR) techniques. This paper proposes a …