【作者】 麦源源；

【导师】 朱林； 赵建军；

【作者基本信息】 华中科技大学 ， 机械设计及理论， 2006， 硕士

【摘要】 针对目前商业化CAD系统的安全缺陷以及在企业实施中存在的安全问题,提出防扩散CAD系统的概念,并给出一套实现方案。该方案将CAD系统和PDM系统集成起来,结合数据加密技术和数字签名技术,以实时加密为基础构建通用的防扩散CAD系统平台,能够对企业的CAD图档数据提供有效的保护,对企业信息的安全管理具有重要的意义。首先,本文简要回顾了CAD系统的发展历程,分析了当前CAD系统的应用现状,指出目前CAD系统存在的安全隐患,明确了CAD系统中数据安全研究的重要性。接着探讨了目前企业应用中采取的安全措施,研究现状以及相关理论。指出CAD系统在数据安全方面的需求以及目前急需解决的问题。其次,根据目前CAD系统的安全需求,结合企业应用中的实际情况,提出防扩散CAD系统的概念。在此基础上建立一套通用的,安全的防扩散CAD系统平台。给出系统的构架,明确各个模块的职能。然后,重点阐述系统的核心技术:实时加密技术,探讨了该技术对于防扩散CAD系统的重要性,分析了该技术的几种实现机制,给出具体的实现方法,评估其技术上的可行性。并针对系统的安全需求,介绍安全方面的相关技术,阐述系统采用的安全策略,分析相应的实现方案。最后,从实践的角度出发,结合企业的实际情况,指出系统仍然存在的问题及其相应的解决方案,并提出了对未来工作的展望。更多还原

【Abstract】 Towards the security defects of current popular CAD systems, this paper brings forward the concept of the Security CAD System ( SCADS ) and gives an appropriate implementation of the system. Combining CAD systems and PDM System, applying data encryption and digital signature, the implementation constructs a security CAD System based on the runtime encryption, provides effective protection of important enterprise CAD data.First, this paper briefly reviews the history of CAD systems, analyses the current application states of CAD systems, points out the security defects of these CAD systems, clarifies the importance of the data security research in CAD systems. Discuss the research results, relative theories and the security measures in current enterprise applications. Point out the security requirement of CAD systems and problems must be solved.Second, according to the security requirements of CAD systems, combing the actual enterprise application, bring forward the concept of security CAD system (SCADS). Based on the concept, construct a general, safe security CAD system platform. Present the system architecture. Determine the functions of each system module.Third, focus on the core technology of the new system, Runtime Encryption. Discuss its importance in security CAD system, analyses some mechanism about the technology, give out the implementation, and evaluate the technical feasibility. Towards the security requirement, introduce security technology, present system security strategy and analyses the security implementation.Last, for practice, according to the actual enterprise circumstance, point out the defects of the new system and the relative solution, bring forward some expectations about Security CAD System.更多还原