The Design Of The Long-distance Network Examination Management System And The Security Of Network Analysis

Along with the rapid development of Internet in my country, the network education and the school information build have already turned into a new hotspot of network application. The Online Test System(OTS) which is important part in distance education supporting platform, is an efficient means in network education teaching feedback and quality evaluation. At the same time, the OTS brings forward immensity challenge.At first, the Online Test System is designed in the project. It adopts browse/server system structure, and exerts the Active Server Pages,VBscript and SQL server 2000 software technology. The item bank, organizing the contents and evaluating the test paper are realized. It is characterized in its convenience and fastness in setting a test paper, its speed and accuracy in evaluating the paper and its scientific analysis of the test paper.Because the examination system through the Internet, we must ensure the safety of the OTS. The authentication and the encryption are two foremost branches on the mode of the Web visiting. At first ,the paper researches MD5 algorithm,and summarizes the characteristic and capability of the MD5. The improved MD5 algorithm is put forward based on the research of the MD5. The improved MD5 is the pivot of the paper.Next,the once password identity authentication is adopted to realize the distanced-identity authentication for ensuring the validity and the safety of the communication. The paper analysese the mode of current authentication and its strongpoints and shortcomings . Then ,it discussed a improved method that is the application of the improved MD5 algorithm in distanced-identity authentication. The once password identity authentication increases the safety of the Online Test System.