Selected Professional Services

Referee for Journals 

IEEE Transactions on Computers, IEEE/ACM Transactions on Networking, IEEE Transactions on Parallel and Distributed Computing, IEEE Transactions on Communications, IEEE Transactions on Mobile Computing, IEEE Transactions on Wireless Communications, IEEE Transactions on Vehicular Technology, IEEE Communications Letters, Elsevier Ad Hoc Networks, Elsevier Computer Networks, Elsevier Communications.

Member of Technical Program Committees for Conferences/Workshops

INFOCOM ('08-'14), ICDCS ('10,'14), RTSS ('11), IWQoS ('11), SECON ('10-'11), MASS ('08,'10-'11), QShine ('08,'09), ICPP ('07,'11), SRDS ('09)

Member of Organization Committees for Conferences/Workshops 

Poster Co-chair, IEEE International Conference on Network Protocol (ICNP), 2011.

TPC Co-chair, IEEE International Workshop on Wireless and Sensor Network Security (WSNS), 2008-2010.

Publicity Co-chair, International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services (Mobiquitous), 2007.

Referee for Proposals  

US NSF Panelist (2008, 2011)

Korean NSF Reviewer (2009)

Editorship  

Guest Editor, Ad Hoc Network Journal (Elsvier) Special Issue on "Privacy and Security in Wireless Sensor and Ad Hoc Networks", Volume 7, Issue 8, November 2009.

Member of Editorial Board, International Journal of Multimedia Intelligence and Security (IJMIS), since 2009.

Member of Editorial Board, Journal of Computers (JCP), Academy Publisher, since 2010.