The Information Hiding Technology Based On The Wallet

In recent years, with the development of network technique and the rapid increase of digital media application, right protection for digital media has been the hotspot of researches. Traditional encryption technique only protects data during transferring period. Once data has been received, the protection will disappear, while the digital watermark technique can protect right information all the time. So it's very important of researches in this field. Most of the former watermark techniques usually use pseudo-random sequence as watermark, which produce a sequence randomly in arithmetic for embedding. It only can detect whether the watermark is still remaining or not. The modern network products and e-commerce require watermark carrying right information such as author, publishing house and publish date and etc. In order to satisfy the new requires to digital watermark, we propose a chaotic encrypted image digital watermarking algorithm based on DWT domain in this paper. Firstly, we design a binary watermarking signal ad encrypted it by a chaotic sequence cipher before it is embedded. Exploiting the excellent properties of the wavelet transform and some characteristics of Human Visual System (HVS), watermark is embedded into the middle frequency images of he original image in DWT domain. The experimental results show that the watermarks are invisible and robust against noise and commonly used image processing methods such as Salt, Pepper noise, etc.