Research and Implementation of Text Watermarking Technology Based on PDF Document Structure
Weijuan Zhao, Hu Guan, Shuwu Zhang · International Journal of Frontiers in Sociology · 2020
Aiming at the problems of illegal copying, malicious tampering, information leakage, copyright disputes and other issues caused by the convenience of the Internet, a watermarking algorithm based on the PDF document structure was developed, a watermarking algorithm model based on the PDF document structure was established, and a DES algorithm was used to encrypt the watermark. Based on the research of the physical structure and logical structure of the PDF document, the algorithm of modifying the color attribute value of the text to embed the watermark information is proposed. Experimental results show that the algorithm achieves information hiding and meets the requirements of digital copyright protection, has good security, and can resist multiple attacks.