Laboratory of Information Security;
School of Computer Science and Technology;
Huazhong University of Science and Technology;
Wuhan 430074;
P.R. China;
College of Information Engineering Hubei Polytechnic University;
Wuhan 430068;
P.R. China;
Laboratory of Information Security;
School of Computer Science and Technology;
Huazhong University of Science and Technology;
Wuhan 430074;
P.R. China;
工作流访问控制; 通信系统; WACM; 动态授权; Petri网络;