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中文摘要：
在网络化制造的环境下,为了保护共享产品数据的版权和完整性,基于树形结构的分形特征,提出了一种面向树形数据的产品数据版权保护方案。通过在产品结构数据树中嵌入分形水印、结构水印和节点水印,很好地实现了针对零部件内容和产品结构内容的综合保护,从而为网络化制造领域的产品数据版权保护提供了一种可行的解决方案。仿真结果和分析表明,该方法能够对抗产品数据面临的各种攻击,尤其是针对产品结构变换攻击和子树攻击具有天然的免疫能力。
英文摘要：
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.
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