Chinese Wall security policy (CWSP) is one of the most important security policies in commercial information area.But the CWSP proposed by Brewer and Nash can't fully meet the practical requirement.The role-based access control (RBAC)

a policy neutral model

has recently received considerable attention as a most promising alternative to traditional discretionary access control (DAC) and mandatory access control (MAC) models.RBAC and the Chinese Wall security policies are given

and expanded due to the practical application.The RBAC-based method to expand CWSP is systematically discussed.Thus

the enhanced CWSP (ECWSP) is presented firstly.And then the method of configuring RBAC to enforce the ECWSP is systematically studied.