A Privacy Protection Model in ID Management Using Access Control. - Hyang-Chang Choi; YongHoon Yi; Jae-Hyun Seo; BongNam Noh; HyungHyo Lee (ICCSA (2), 2005)

Design and Implementation of a Policy-Based Privacy Authorization System. - Hyang-Chang Choi; Seungyong Lee 001; HyungHyo Lee (ISI, 2006)