A Novel Approach to Detect Network Attacks Using G-HMM-Based Temporal Relations between Internet Protocol Packets

1Division of Information and Computer Engineering, College of Information Technology, Ajou University, Suwon 443-749, Republic of Korea 2Department of Information and Communication Engineering, Korea Advanced Institute of Science and Technology, 119 Munjiro, Yuseong-gu, Daejeon 305-701, Republic of Korea 3Department of Computer Science and Engineering, Seoul National University of Science and Technology, 172 Gongneung 2-Dong, Nowon, Seoul 139-743, Republic of Korea 4Department of Business Administration, Daejin University, San 11-1, Sundan-Dong, Pocheon-Si, Gyunggi-Do 487-711, Republic of Korea