Embedding Dual Digital Watermarks Using Odd-Even Property of Binary Images and RSA Public-Key Cryptosystem

• Main Authors: Zhi-He Zhong, 鍾志和
• Other Authors: Yuan-Hsiang Chang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/90003678570955949181

碩士 === 中原大學 === 資訊工程研究所 === 97 === While digital multimedia can be obtained conveniently from the Internet, protection of intellectual property rights has become an issue. In this paper, we present a “dual digital watermark embedding/extracting system using odd-even property of binary images and RSA public-key cryptosystem”. Our research method can be divided into two phases: embedding and extracting. We propose an odd-even sandwich method as the core technique to embed or extract dual digital watermarks. In addition, the RSA public-key cryptosystem is used to enhance the security. Results show that our proposed system improves the Yang & Niu method by increasing the payload for digital watermarks and is reasonably robust to noise and image cutting attacks (Normalized correlation > 0.9). In conclusion, our system offers an advanced option to the legitimate owner or user who may choose different keys to verify if the corresponding digital watermark is correct, leading to relatively effective data management and protection.