协同设计中CAD模型的安全控制!

Security Control for CAD Models in Collaborative Design

针对协同设计环境的复杂性和设计过程的特殊性,提出一种多层次细粒度的主动安全保护方法,以实现对产品三维CAD模型的全生命周期的多方位安全保护。采用基于角色的访问控制(RBAC)构建适合三维数字化协同设计的多层次安全访问控制方法,细化访问控制粒度;通过特征去除、模型三角化和三角网格模糊技术进行模型的多分辨率造型,实现产品模型的敏感细节保护;通过客户端的功能管理拓展安全控制能力,防止内部人员的泄密行为;采用透明加密技术对模型数据进行全生命周期的加密保护。实例证明,该方法有效保护了协同设计中的模型安全。

A multi level and fine--grained access control method was presented herein for CAD models to meet the complexity of collaborative design environments and particularity of collaborative design process. This method realized life cycle protection for CAD models. Based on role--based access control（RBAC） and multi level models,a multi--level security access control was developed to pro vide fine grained access control. Multi resolution models were created based on feature removal, tessellations and mesh simplification. Different resolution models included different levels of detail to those who have appropriate access privileges,so the sensitive information can be protected. The key is sues of control client software features were discussed,and they were insurance against information leak out. Transparent encryption technique was present to lift cycle protect the models in collaborative environment. A prototype system was developed and the results were reported. Based on practices, these methods can protection the information of CAD models effectively during collaborative design.