ID-Based Secure Session Key Exchange Scheme to Reduce Registration Delay with AAA in Mobile IP Networks. - Kwang Chul Jeong; Hyunseung Choo; Sang Yong Ha (International Conference on Computational Science (2), 2005)

End-to-End QoS Monitoring Tool Development and Performance Analysis for NGN. - Chinchol Kim; Sangchul Shin; Sang Yong Ha; Sunyoung Han; Youngjae Kim (APNOMS, 2006)