LIU Wu, Ph.D., associate professor; research fields: network & information security and IPv6 security applications. WU Zhi-you, Ph.D., professor; research fields: network & information security and global optimization. DUAN Hai-xin, Ph.D., associate professor; research fields: network & information security and IPv6 security applications. LI Xing, Ph.D., professor; research fields: network & information security and network management. WU Jian-ping, Ph.D., professor; research fields: network & information security and computer infrastructure.