Physical layer security based on spread-spectrum watermarking and jamming receiver

Adaptive Spread Spectrum Based Watermarking of Speech

A signal adaptive spread spectrum based inaudible speech watermarking technique has been proposed in this paper. The strength of the watermark to be embedded is adapted to the local signal energy such that the watermark is just audible and detection is efficient. Spread Spectrum technique is used to make the watermarking technique more robust against attacks such as watermark removal and impair...

Strengthening Spread Spectrum Watermarking Security via Key Controlled Wavelet Filter

Adaptive-Rate Image Watermarking based on Spread Spectrum Communication Technique

As the Internet becomes more and more populous, people concern more about the copyright protection issue for digital data such as images and audio. Digital watermarking technique can hide data in images or audio to indicate the data owner or recipient. Therefore, it can protect the copyright. There were a lot of papers discussing how to embed watermark into images in recent years. However, few ...

Robust spread-spectrum audio watermarking

We present several mechanisms that enable effective spreadspectrum audio watermarking systems: prevention against detection desynchronization, cepstrum filtering, and chess watermarks. We have incorporated those techniques them into a system capable of reliably detecting a watermark in an audio clip that has been modified using a composition of attacks that degrade the original audio characteri...

Security of spread-spectrum-based data hiding

This paper presents an information-theoretic analysis of security for data hiding methods based on spread spectrum. The security is quantified by means of the mutual information between the observed watermarked signals and the secret carrier (a.k.a. spreading vector) that conveys the watermark, a measure that can be used to bound the number of observations needed to estimate the carrier up to a...