Home-Work Separation in the Context of Institutional and Spatial Transformation in Urban China:Evidence from Beijing Household Survey Data

According to characteristics of workflow performing,based on task-role-based access control model,this paper advanced rudimental assigned policy of users,load equilibrium of user,separation of duties of user,cardinality constraint of user etc.

This paper expanded task-role-based access control model,advanced some new strategy of user-oriented task assignment and role-oriented privilege assignment,which effectively solved the question of implicative responsibility,user-oriented business task,user-oriented separation of duties,and privilege s assignment.

Based on Role-Based Access Control Model,a new method based on mutually exclusive roles is proposed to implement separation of duties.

Time-based separation of duty;

However,there are some limitations of the dRBAC model,which represent the following issues: no control on the depth of delegation,circular search for delegation chain,covert promotion of role,violating separation of duty.

In the paper,it is mainly discussed about separation of duty in the role-based access control(RBAC)models by means of time,and introduce a simply specification to explain the temporal separation of duty as well as the corresponding enforcement model.

Since the 1960 s,along with the development of management and information technology,the enterprise hadgradually stressed on logistics function through the reorganization,the evolution has approximately experienced three stages:function separation stage,function polymerization stage and process conformity stage.