Study of the Role and Task-based Access Control Technology for CSCW System
Yong Zhong Tang · 2010
CSCW systems have many new requirements for access control,which cannot be met by existing models.In this paper,a new role and task-based access model (RTBAC) was presented to meet these requirements.This model formally describes the relationship between the key elements of access control such as user,role,task,privilege,and workflow.The model grants and revokes access privileges of users by assigning them roles and canceling their roles,and provides partial inheritance and delegation between roles.In this model the conception to task was introduced,group tasks were divided into workflow task and independence task,and the relationship between roles and tasks was described.From those the model can dynamically manage the permissions through tasks and tasks' status.RTBAC model is brought forward aiming at accommodating with the characteristics of collaborative systems such as multi-user,dynamic,and collaboration.It can meet the requirements for access control in CSCW system adequately.