Research on a Mobile Agent-based Distributed Intrusion Detection System Wang Xia Chen Yunzhi College of Information Science and Engineering,Nanjing University of Technology,Jiangsu,Nanjing, 210009 Abstract:Distributed intrusion detection systems (DIDS) have many advantages such as scalability, subversion resistance. However, there are some impediments when they are implemented. The mobile agent (MA) technology is of many features to suit the implementation of distributed IDS. MADIDS employs MA technology to coordinately process information from each monitored host, and then completes global information extraction of intruder actions. A MADIDA is analyzed thoroughly in this paper. Keywords:Distributed Intrusion Detection; Mobile agent; Network Security