GUAN Shang-yuan, Ph.D.candidate; research fields: trust management and automated trust negotiation. DONG Xiao-she, professor; research fields: grid computing and high performance computing. MEI Yi-duo, Ph.D. candidate; research fields: grid computing and peer-to-peer computing. ZHU Zheng-dong, lecturer; research field: Web service. WU Wei-guo, professor; research field: heterogeneous computing.