PCAV: Internet Attack Visualization on Parallel Coordinates. - Hyunsang Choi; Heejo Lee (ICICS, 2005)

Botnet Detection by Monitoring Group Activities in DNS Traffic. - Hyunsang Choi; Hanwoo Lee; Heejo Lee; Hyogon Kim (CIT, 2007)

BotGAD: detecting botnets by capturing group activities in network traffic. - Hyunsang Choi; Heejo Lee; Hyogon Kim (COMSWARE, 2009)

Fast detection and visualization of network attacks on parallel coordinates. - Hyunsang Choi; Heejo Lee; Hyogon Kim (Comput. Secur., 2009)

State of the Art of Network Security Perspectives in Cloud Computing. - Tae Hwan Oh; Shinyoung Lim; Young B. Choi; Kwang-Roh Park; Heejo Lee; Hyunsang Choi (SUComS, 2010)

Detecting Malicious Web Links and Identifying Their Attack Types. - Hyunsang Choi; Bin B. Zhu; Heejo Lee (WebApps, 2011)

Identifying botnets by capturing group activities in DNS traffic. - Hyunsang Choi; Heejo Lee (Comput. Networks, 2012)