1JI Zhen-zhou1, FANG Bin-xing1, SHI Jie2 (1. Dept. of Computer Science and Engineering, Harbin Institute of Technology, Harbin 150001, China,2. Project Department Railway Office of Shenyang, Shenyang 150001, China).Research on data security under WWW specific environments[J].Journal of Harbin Institute of Technology(New Series),2000,7(S1):94-96.