Authorization, authentication, and accounting schemes for WiMAX (Worldwide Interoperability for Microwave Access) are the focus of this paper. WiMAX works as a wireless metropolitan area network (MAN) technology, based on IEEE 802.16 specifications, which was designed to provide high-throughput wireless broadband connections (up to 70 Mbps for fixed scheme and up to 15 Mbps for mobile scheme) over long distances (up to 30 miles) , which is described as a "framework for the evolution of wireless broadband". The main focus of the authentication and authorization is based on the privacy key management $extensible authentication protocol for pairwise key manegement "EAP-PKM" and the accounting issue
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