Title	A Study on DRM System for On/Off Line Key Authentication
Author	Kun-Won Jang, Chan-Kil Park, Jung-Jae Kim, Moon-Seog Jun
Citation	Vol. 6  No. 2  pp. 233~238
Keywords	DRM, Symmetric key, Agent, PKI.

Title	Methodology of Secure and Efficient Source Authentication Protocol for Multicast Data Streams
Author	Sanghoon Jeon, Jeonghoon Jeon, Moonseog Jun
Citation	Vol. 6  No. 2  pp. 226~232
Keywords	Multicast, Source Authentication, Streaming Data security.

Title	Analyzing Impacts of Software Diversity on Worm Propagation in Peer-to-Peer Networks
Author	Ying Zhou, Zhong-fu Wu, Feng Li, Hao Wang, Zheng-zhou Zhu
Citation	Vol. 6  No. 2  pp. 219~225
Keywords	Peer-to-Peer Network, Peer-to-Peer Worm, Software Diversity, Worm Propagation.

Title	Combining Multiple Techniques for Intrusion Detection
Author	Ronghua Yao, Qijun Zhao, Hongtao Lu
Citation	Vol. 6  No. 2  pp. 208~218
Keywords	intrusion detection system, combined detection model, fusion method.