[Xia, Zhe] Department of Computer Science , Wuhan University of Technology , 122 Luoshi Road, Wuhan 430071, China
[Chen, Jingxue] Guangxi Key Laboratory of Trusted Software , Guilin University of Electronic Technology , 1 Jinji Road, Guilin 541004, China
[Hsu, Chingfang; Cui, Jianqun] Computer School , Central China Normal University , 152 Luoyu Road, Wuhan 430079, China
[Harn, Lein] Department of Computer Science Electrical Engineering , University of Missouri-Kansas City , 5100 Rockhill Road, Kansas City, MO 64110, USA