一种新的协同设计环境中访问控制模型研究*

作者：沈国强，姚丽华，张国煊，姜涛 日期：2009-04-21/span> 浏览：3712 查看PDF文档

一种新的协同设计环境中访问控制模型研究*

沈国强，姚丽华，张国煊，姜涛
（杭州电子科技大学 机械工程学院，浙江 杭州 310018）

摘要：通过对现有访问控制方法的研究，针对其中的不足和协同设计环境中对访问控制的特殊要求，提出了一个新模型RTBAC。该模型综合了基于任务的访问控制（TBAC）和基于角色的访问控制（RBAC）模型，从而将静态访问控制和动态访问控制相结合，并在此基础上引入了用户委托，系统基于B/S架构满足了计算机支持的协同设计（CSCD）系统的需求；引入权限加减机制，弥补了控制粒度过大的问题；通过矩阵计算和验证状态加快了访问和协同设计的速度。研究结果表明，提出的新模型可加快协同访问控制速度，增强协同访问控制的安全性和有效性。
关键词：计算机协同设计；基于任务的访问控制；基于角色的访问控制
中图分类号：TP391.72文献标识码：A文章编号：1001-4551(2009)04-0063-04

Study of new access control model in cooperative design environment
SHEN Guo-qiang, YAO Li-hua, ZHANG Guo-yan, JIANG Tao
（College of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China）
Abstract: A research on the existing access control method has been made. Aiming at its weakness and special request of access control in cooperation design environment, a new model RTBAC was proposed. The task based access control(TBAC) and role based access control(RBAC) models were synthesized to combine the static state access control with the dynamic access control. The users request was introduced and the system was based on the B/S construction, the demand of the computer supported cooperative design(CSCD) system was satisfied. The addition and subtraction mechanism was introduced, the problem of the oversized control granularity was made up. Through the matrix computation and the confirmation condition, the access and cooperation design were speeded up. The results show that the new model can speed up the access control race, enhance access control security and validity.
Key words: computer supported collaborative design(CSCD); task based access control(TBAC); role based access control(RBAC)