这个是物联网中自主访问控制（DAC）与带有互斥角色约束的基于角色的访问控制（RBAC）演示程序。主要实现访问控制的安全进行。-This is the Internet of Things in discretionary access control (DAC) with an exclusive role constraints with role-based access control (RBAC) demonstration program. The main achievement o