Design and Realization of the Forensics Search System of Computer Crimes;

On the Person Who are Relatively Responsible for Crimes Should not be the Subject of the Computer Crime;

After a dozen of year s development,computer forensic technology,as a special one,has become one of the most important ways in which public security departments find and gather evidence,and it has been used extensively to solve computer crimes and accidents.

There exist security problems due to the openness of computer system and the weakness of computer itself, which leads to many computer crimes.

While meeting the arrival of informational society, people find computer crimes have been increased sharply, which not only bring great economic damage to the victims but destroy the economic order of the society and threaten every country s national security and social cultures.

On Material trace and psychological trace on the crime scene;

Methods of the crimes are more and more intellectualized,skilled and violent,so it is necessary for us to extend the scope of the crime scene search in order to get the investigative information as much as possible.

Bloodstains are usually left on violent crime scene.

The aim of analyzing latent traces on the scene of crime is to understand the intention of the criminals and to explain the inexplicable traces left on the scene.