ISSN : 1796-2056
Volume : 3    Issue : 2    Date : February 2008

Secure Multicast in WiMAX
Sen Xu, Chin-Tser Huang, and Manton M. Matthews
Page(s): 48-57
Full Text:
PDF (602 KB)

Multicast enables efficient large-scale content distribution and has become more and more popular
in network service. Security is a critical issue for multicast because many applications require
access control and privacy. This issue is more sensitive to wireless network, which is lack of
physical boundaries. IEEE 802.16 is the standard for next generation wireless network, which aims
to provide the last mile access for Wireless Metropolitan Area Network (WirelessMAN). Multicast is
also supported in IEEE 802.16, and a Multicast and Broadcast Rekeying Algorithm (MBRA) was
proposed in the standard as an optional function for secure multicast. However, this algorithm does
not provide backward and forward secrecy. It is not scalable to a large group either. This paper
reviews the above two deficiencies of MBRA and proposes revision to address these problems for
Intra-BS multicast. We also propose algorithms for secure multicast in different scenarios of
WirelessMAN besides its basic schema, including Inter-BS multicast, multicast for mesh network,
and multicast during handover.

Index Terms
Secure Multicast, IEEE 802.16, Wireless-MAN, Handover