He is an associate editor or on editorial board of some international journals including IEEE Transactions on Parallel and Distributed Systems (TPDS), Security and Communication Networks (SCN), International Journal of Parallel, Emergent and Distributed Systems (IJPEDS), and International Journal of Computational Science and Engineering (IJCSE). He has served as guest editor-in-chief or guest co-editor for international journals including IEEE Transactions on Parallel and Distributed Systems (TPDS), Journal of Computer and System Sciences (JCSS), and IEICE Transactions on Information and Systems. He has served as general co-chair or program co-chair for a number of international conferences including ISPA 2017, IUCC 2017, ISPEC 2016, APSCC 2016, PRDC 2015, ICA3PP 2015, HPCC 2013, CSS 2013, MobiQuitous 2013, ICA3PP 2012, and ATC 2009. He is the Leading Steering Chair of the IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom 2011), and the Leading Steering Chair of the International Conference on Security, Privacy and Anonymity in Computation, Communication and Storage (SpaCCS 2016). He is a member of IEEE (2010-), a member of ACM (2011-), a member of IEICE (2011-), a distinguished member of CCF (2013-), and an executive member of the council of Hunan Provincial Association of Computers (2011-2016).