Adoption of Delayed Feedback Rekeying Algorithm for secure multicast services during handover in mobile WiMAX networks

Mobile WiMAX systems are based on the IEEE 802.16e-2005 specification which allows great opportunities to enhance the performance through radio resource management techniques. IEEE802.16e offers higher data rates and introduces several key features necessary for delivering mobility at vehicular speeds. In most applications, security attributes are pretty difficult to meet but it becomes even a bigger challenge when talking about Multicast Broadcast Services (MBS) over Mobile WiMAX (IEEE802.16e). Handover (HO) will occur repeatedly for vehicles travelling at high speeds, causing many unnecessary multicast group rekeying procedures. Enhanced Delayed Feedback Rekeying Algorithm (DFRA) will obviate most of the rekeys due to member HO, while keeping backward and forward secrecy for this multicast group. The current paper not only studies the DFRA but also, it will propose an adoption for the DFRA and assist this adoption in different customer distributions and multicast group cluster sizes, in order to improve the performance and security of the DFRA deployment.