The IEEE 802. 16 (or) Worldwide Interoperability for Microwave Access (WiMAX) [7] 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 [12]. 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 [2]. In the current scenario, existing method do not provide security level for end to end communications. The security algorithms namely TWOFISH [5] and BLOWFISH [26] are to encrypt the packets with best security levels for end to end communications. Analyses are done between these two algorithms with the existing encryption algorithms, from that TWOFISH is the best security algorithm and BLOWFISH is the fastest algorithm.

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Cryptographic Algorithms Encryption Ipsec Network Layer.