A Novel Rekey Management Scheme in Digital Broadcasting Network. - Han-Seung Koo; Il-Kyoo Lee; Jae-Myung Kim; Sung-Woong Ra (APNOMS, 2006)

An Active Entitlement Key Management for Conditional Access System on Digital TV Broadcasting Network. - Han-Seung Koo; O-Hyung Kwon; Sung-Woong Ra (NOMS, 2006)

A novel protocol for downloadable CAS. - Youngho Jeong; Soonchoul Kim; Heejeong Kim; Han-Seung Koo; Eunjung Kwon (IEEE Trans. Consumer Electron., 2008)

A tree key graph design scheme for hierarchical multi-group access control. - Han-Seung Koo; O-Hyung Kwon; Sung-Woong Ra (IEEE Commun. Lett., 2009)

Dynamic load balancing algorithm for upstream bandwidth allocation in DOCSIS 3.0. - Han-Seung Koo; Dong Joon Choi; Namho Hur (ICTC, 2012)

A low overhead TEK rekeying scheme for IPTV CAS over DOCSIS 3.0. - Han-Seung Koo; Dong Joon Choi (ICTC, 2013)

Design and implementation of trust authority servers for downloadable CAS. - Han-Seung Koo; Juyoung Park (ICTC, 2014)

Downloadable multi-CA/DRM service model and architecture for mobile broadcasting. - Han-Seung Koo (ICTC, 2015)