The paper firstly presents digital forensic process and correlative technology,analyzes technology that is being applied at present ,points out the deficiency and brings forward the concept of initiative forensic.

In the paper, the research direction and contents of the electronic forensics obtain, such as the host computer s safe, restoring and analysis technology, datum obtain and analysis in network, the active forensics technology, the code analyze and decryption, and the electronic proof law, was presented and analyzed briefly.

computer dynamic forensics system based on the data mining;

Research on the Dynamic Forensics Based on Intelligent Agent;

the key of dynamic forensics is how mining effective crime evidence information from the magnanimous data on real-time.

An active prefetching algorithm for streaming media based on natural number segmentation was proposed.

To realize the technology,the active prefetching algorithm for streaming media based on relevance between resources was adopted to obtain advertisement resources.