An Efficient Key Management Algorithm for Hierarchical Group Communication. - H. Ragab Hassan; Abdelmadjid Bouabdallah; Hatem Bettahar; Yacine Challal (SecureComm, 2005)

A New and Efficient Key Management Scheme for Content Access Control within Tree Hierarchies. - H. Ragab Hassen; Abdelmadjid Bouabdallah; Hatem Bettahar (AINA Workshops (1), 2007)

Key management for content access control in a hierarchy. - H. Ragab Hassen; Abdelmadjid Bouabdallah; Hatem Bettahar; Yacine Challal (Comput. Networks, 2007)

An efficient key management scheme for content access control for linear hierarchies. - H. Ragab Hassen; Hatem Bettahar; Abdelmadjid Bouabdallah; Yacine Challal (Comput. Networks, 2012)