Based Leak Detection Network Security Risk Assessment System

There are inevitably some potential security risks while the Internet is providing open or shared resources. In order to to protect the security of the network,the primaray problem to solve is to understand the present and the potential risk of the network,evaluate the probable security threats and affection extent brought by the risk.The research work mentioned in this paper is mainly about analyzing the method of risk evaluation.Because there are no accepted method of asset identification and evaluation,threat identification and evaluation, present security policy identification and evaluation,comprehensive risk evaluation.There are some indefinite factors and unmeasurable characteristic,and threat must exploit the vulnerability of asset to cause harmfulness,so the conclusion of vulnerability evaluation tips the scale in assessing risk level.But there are no reference on vulnerability testing,so this paper gives a method of testing the vulnerability of the LAN,and carry it into practice;designs a security risk evaluation system based on vulnerability detection,explains about the structure in detail.Finally we summarize the whole paper and propose some improvable problems.