基于dxf格式cad文档保护系统置乱模块的设计与实现学士学位论文.docVIP

摘 要 作为一款优秀的工业制图软件，AutoCAD得到了极为广泛的应用。但是随着AutoCAD的广泛应用，许多问题也逐渐凸现出来，其中尤为突出的就是文档保护问题。众所周知，每一张工程图纸都是工程师们的智慧结晶，关系了公司的最直接利益。每个公司都把工程图纸当作最机密的文件，一旦泄露到竞争对手手中，将给公司带来无法估计的损失。 AutoDesk公司提供了一个优秀的二次开发工具ObjectARX，通过这个工具我们可以极为方便地开发出AutoCAD软件的插件。这为我们开发出一个文档保护工具提供了可能性。 本文所论述CAD文档保护系统置乱模块，就是通过对CAD文档中各种实体进行一种可逆变换，令CAD文档脱离特定环境后可以隐藏其真实信息，从而起到保护作用。本文的重点在于如何分割实体，针对不同的实体设计出相应的加密算法。本文还涉及到对用户行为的监控，软件与AutoCAD软件的兼容性问题等问题的研究。 关键词　CAD；文档保护；置乱；加密算法 Abstract As a good industrial mapping software, AutoCAD has been extremely wide range of applications. However, with the extensive application of AutoCAD, many of the problems highlighted by gradually, which is particularly striking is that the document protection issues. As we all know, every one of the drawings are the wisdom of engineers, and the companys most direct interest. Engineering drawings of each company regarded as the most confidential documents, once leaked to the hands of competitors, the company will not able to estimate the losses. AutoDesk has provided an excellent secondary development tools ObjectARX, through this tool we can very easily develop a plug-in AutoCAD software. We developed this as a tool for the protection of the document provided a possibility. This paper discussed by the CAD document protection system scrambling modules, the CAD is to document the various entities in a reversible transform ation, the CAD documents from the specific circumstances after the information to hide its real and thus play a protective effect. In this paper, the focus is how to separate entities, for different entities to design the corresponding encryption algorithm. It also involves monitoring the behavior of users, software and AutoCAD software compatibility problems and other issues of the study. Keywords CAD Document Protection Scrambling Encryption algorithm 毕业设计（论文）原创性声明和使用授权说明 原创性声明 本人郑重承诺：所呈交的毕业设计（论文），是我个人在指导教师的指导下进行的研究工作及取得的成果。尽我所知，除文中特别加以标注和致谢的地方外，不包含其他人或组织已经发表或公布过的研究成果，也不包含我为获得 及其它教育机构的学位或学历而使用过的材料。对本研究提供过帮助和做出过贡献的个人或