The temporal characteristic could provide the dynamic control factor for the RBAC(Role Based Access Control)model,which is the research hotspot in the security model field.

• 具有时态特征的角色访问控制(RBAC:Role Based Access Control)模型能够为RBAC控制机制提供动态的时间控制因素,是目前安全模型领域的研究热点。