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The Scientific World Journal
Volume 2015 (2015), Article ID 878327, 6 pages
Research Article

Security Enhancement Using Cache Based Reauthentication in WiMAX Based E-Learning System

1Department of Information Technology, K. S. Rangasamy College of Technology, Thiruchengode, Namakkal, Tamil Nadu 637 215, India
2Department of Computer Science and Engineering, KSR Institute for Engineering and Technology, Thiruchengode, Namakkal, Tamil Nadu 637 215, India

Received 17 April 2015; Revised 17 July 2015; Accepted 28 July 2015

Academic Editor: Gian Luca Marcialis

Copyright © 2015 Chithra Rajagopal and Kalaavathi Bhuvaneshwaran. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


WiMAX networks are the most suitable for E-Learning through their Broadcast and Multicast Services at rural areas. Authentication of users is carried out by AAA server in WiMAX. In E-Learning systems the users must be forced to perform reauthentication to overcome the session hijacking problem. The reauthentication of users introduces frequent delay in the data access which is crucial in delaying sensitive applications such as E-Learning. In order to perform fast reauthentication caching mechanism known as Key Caching Based Authentication scheme is introduced in this paper. Even though the cache mechanism requires extra storage to keep the user credentials, this type of mechanism reduces the 50% of the delay occurring during reauthentication.