A wavelet-based image watermarking algorithm for tamper-proofing;

Multiwavelet image watermarking algorithm based on genetic algorithms;

Improving on fractal image watermarking algorithm;

New algorithm for embedding and detection image watermark;

Adaptive image watermarking algorithm based on block DCT transform and Arnold shuffling;

A robust image watermarking scheme based on a trusted third party;

In order to embed watermark image, we process the watermark image by classification, one part embedded in space domain with blind w.

The algorithm splits the original image to some blocks,using correlation of neighboring pixels,a bit watermark is embedded into erery block,the watermark is a binary sequence based on significative watermark image,and using key and average of prediction swatch to determine the position of watermark in the image block,which can assure very good security for the watermark.

The process of embedding,withdrawing and checking watermark image is analyzed,the method of picture’s Arnold trans-formation and relativity examination is researched.

In this paper,a multipurpose image watermarking algorithm based on chaos and DWT(Discrete Wavelet Transform) is proposed.

A zero-embedding algorithm for multiple watermarks;

One of the most important issues is how to ensure that multiple watermarks embedded have no effect on each other.

Based on the analysis of the security gap in the authentication mechanism using digital signature,a novel authentication system combining asymmetric key cryptography and multiple watermarks technique is proposed.