International Journal of Computer Applications
The IEEE 802.16 (or) Worldwide Interoperability for Microwave Access (WiMAX) is a standards-based technology enabling the delivery of last mile wireless broadband access with Quality of Service (QoS) guarantees, security, and mobility. For security in WiMAX the privacy sub layer of the MAC layer has the main objective to protect service providers against theft of service but not securing network users . It is obvious that the privacy sub layer only secures data at the data link layer, but it does not ensure complete encryption of user data. To secure the networks, the IPSec protocol may be the most effective and suitable protocol to secure end-to-end network layer communication.