关键词: 版权保护, 数字水印, 分形水印, 网络化制造

Abstract: To protect copyright and integrity of shared product data in networked manufacturing, a new copyright protection scheme for product data was proposed based on the concept of fractal and digital watermark. This scheme made full use of the fractal characteristics in treestructured data. The solution provided a comprehensive and perfect protection for both node content and structure of tree by way of embedding fractal watermark, structural watermark and node watermark as well. Experiments were conducted on the robustness of the solution against various forms of attacks. Results highlighted correctness of our solution, especially the immunity against treestructure transformation attacks and subtree attacks.

Key words: copyright protection, digital watermark, fractal watermark, networked manufacture, digital copyright