Hi-KD : Hash-based hierarchical Key Distribution for Group Communication
H. Ragab Hassan, Abdelmadjid Bouabdallah, Hatem Bettahar, Yacine Challal · 2005
Even though hierarchical group communication is a prominent communication model for a variety of applications, featured by hierarchical communication rules, it has not been su#ciently investigated in the security literature. In this paper, we introduce private hierarchical group communication and we determine its specific confidentiality requirements, then we propose an e#cient key management protocol satisfying those requirements. This work is done in the frame of a national french project whose consortium includes the international telecom company EADS, INRIA, CNRS and ENST-Paris. The project is called SafeCast and deals with group communication in PMR networks that are used mainly by security corps (police, fire fighters, soldiers,. . . ) in areas where it is di#cult to have network infrastructures, such as war battles or following a natural disaster (earthquake, tsunami, tornado, . . . ).