Implementation Of Agent In The LAN Classified Inspection By Using Trojan Horse Technology

With the rapid development of information technology, human society is entering the information age, information has become valuable human resources, especially computer networks have penetrated into all spheres of society, information is increasingly becoming a strategic resource, and people rely more and more on the decision-making in the information. However, the networks and the development of information technology, in addition to bring improvements in the efficiency of our work, quick access to information and the convenience of life, but it also brings the issue of information security. Agent-based LAN classified inspection is the idea of active defense, inspection of LAN classified information storage situation. Acting as a benign Trojan horse in various LAN terminals,not only to complete the inspection tasks but also to prevent the user intentionally or unintentionally deleted. So this paper is based on this requirement, the use of Trojan horse design ideas, using API interception, hooking the System Services Described Table and penetrating through the firewall, as well as some of other techniques to enhance the viability of the program. The ultimate application has been fairly satisfactory results in practice.