The role delegation authorization model of a computer-supported cooperative design system

摘要

According to the specific characteristics of a computer-supported cooperative design(CSCD)system,the characteristics of role delegation authorization(RDA)are analyzed and deduced,and a set of fitful status is arrived at.Because of the diversified characteristics of RDA features in different systems,the RDA model has multi-varying status.On the basis of the basic model of role-based access control (RBAC),some basic characteristics of RDA are summed up.Then,according to the specific characteristics of CSCD system,the characteristics of RDA are recombined to develop a RDA model that is suitable for the CSCD system.It is different from the conventional role authorization models of RBAC,that is,it adopts the decentralized authorization management instead of the centralized one in CSCD system,which makes the management more flexible.This model is verified through a specific case of CSCD system.