4M L Bailey,B Gopal,M A Pagels et al. PathFinder:A pattern-based packet classifier[C].In:Proc of the 1st Symp on Operating Systems Design and Implementation, 1994:115～123.
6BobWoods. Study:Intant Messaging Use is a Big Security Threat.URL: http://www.smallbusinesscomputing.com/webmaster/article.php/1369981,2002-06.
7full Hindocha Neal. Threats to Instant Messaging. Symantec Security Response White Paper,http://securityresponse.symantec.com/avcenter/reference/threats.to.instant.messaging.pdf.
8Risk Exposure Through Instant Messasing and Peer-To-Peer(P2P)Networks [J]. Internet Security Systems, http: / / documents. iss. net /whitepapers/X-Force_P2P.pdf, 2002-04.
9吴继锋.[D].北京:中国科学院研究生院,2003.
10Francis J Reiss.Instant Messaging Security Concerns and Recommended Best Practices SANS Security Essentials GSEC Practical[S].Version 1.4b,SANS Institute,2003.
