[Chen, Jiageng] Cent China Normal Univ, Sch Comp Sci, Wuhan 430072, Hubei, Peoples R China.
[Samsudin, Azman; Teh, Jesen] Univ Sains Malaysia, Sch Comp Sci, Gelugor 11800, Penang, Malaysia.
[Liu, Zhe] Univ Luxembourg, Interdisciplinary Ctr Secur Reliabil & Trust SnT, Esch Sur Alzette, Luxembourg.
[Liu, Zhe] Nanjing Univ Aeronaut & Astronaut, Coll Comp Sci & Technol, Nanjing 210016, Jiangsu, Peoples R China.
[Su, Chunhua] Univ Aizu, Aizu Wakamatsu, Fukushima 9658580, Japan.