Abstract: “In this paper, we study the existing standards in multihop WiMAX networks and their security issues. For secured communications, it is necessary to have hop-by-hop authentication for any multihop wireless networks. WiMAX multihop networks provide default hop-by-hop authentication in a distributed security mode only. Apart from this, the multihop standards should consider the existing security issues in mobile WiMAX standard [4]. It provides the solution for medium access control (MAC) – control”

Keywords: WiMAX ; IEEE 802.16 d/e /j/m ; Multihop; Security.