State-based key management scheme for wireless sensor networks. - Jaemin Park; Zeen Kim; Kwangjo Kim (MASS, 2005)

Certificateless Authenticated Group Key Agreement Protocol for Dynamic Groups. - Sungchul Heo; Zeen Kim; Kwangjo Kim (GLOBECOM, 2007)

A Lightweight Privacy Preserving Authentication and Access Control Scheme for Ubiquitous Computing Environment. - Jangseong Kim; Zeen Kim; Kwangjo Kim (ICISC, 2007)

Forward Secure ID-Based Group Key Agreement Protocol with Anonymity. - Hyewon Park; Zeen Kim; Kwangjo Kim (SECURWARE, 2009)