Data recovery is the basis of network forensic.

Network forensic system gives us a new method of network protection,and remedies the shortage of the current network security system.

All the present network forensic systems assume that the system is still working on reliable state when intrusion occurs,and the effect of system state changes is not considered.

Research on adaptive technique of network forensics based on multi-agent;

Proactive network forensics system based on agents;

Study on Self-adaptive Dynamic Network Forensics

We do the modeling analysis on the response of network cases with control theory of general system in system science and respond to different networkcases with overall response mechanism and local response mechanism in the control theory.

In recent years,the network pornography has already become a question concerned the commons with the high development of the network.

At present,our country network pornography activity situation is very severe,and we face many prob- lems in the fighting against the intemet pornography work:the special investigation strength is weak,the detection collection of the evidence is difficult;the related law is imperfect,the discretion of punishment to be difficult and so on.