Lan Environment, A Network Security System Based On Agent

in recent years, with the quickly development of the globalInformation ] ~chnol ogy. especially after the world-famous Websites, suchas Yahoo and eBay, were attacked one by one by hackers in Feb.2000, thewhole world deeply realized the importance of the network informationsecurity. The security problems must be settled urgently for it's a seriousproblem that will influence the whole country and its future. Counties aredoing all they can to strength their power to guarantee the country'sinformation security, which will affect their government, military affairs,economy. culture and other aspects of the society.While all circles especially the IT circles show highly attention to thenetwork security problem and give much energy to study it, Agenttechnology has become a hot issue of the Artificial Intelligence fields.Agent has the character of autonomy and aptitude that attract the attentionof various research fields. it will surely be applied widely.Both the network security technology and the Agent technology arcdiscussed hotly, but it's seldom to band them together. Theoretically, it'sfeasible to combine them according to their characteristic. So in this thesisa new type of network security architecture based on Agent technology isbrought forward.The fbllowing is the main work of the thesis:First, it discusses the existing network security technologies, networksecurity architectures, Agent technology and Multi-Agent technology,including their contenls, makeup. various ideas, traits and their currentresearch pitch. etc.Second, it puts forward a new type network security architecture basedon Agent technology and then comments on it.Third. it describes three Agent models of network security technologyiiABSTRACTof the new architecture: Packet Filtering Agent, Network AddressTransaction Agent and Computer Virus Prevention-and-cure Agent.The last section of this thesis is the system design and the softwareimplement of some Agent models according to the above.