[1] Northwestern Polytech Univ, Sch Cybersecur, Xian, Peoples R China
[2] Aviat Ind Dev Res Ctr, Dept Informat Secur, Beijing, Peoples R China
[3] Univ Houston, Mech Engn, Houston, TX USA
[4] Northwestern Polytech Univ, Sch Automat, Xian, Peoples R China