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A Novel Security Scheme during Vertical Handoff in Integrated Heterogeneous Wireless Networks
Rastogi, Nidhi

2009, MS, University of Cincinnati, Engineering : Computer Science.
In an integrated heterogeneous wireless network (IHWN), a user can connect itself to different types of networks on anytime, anywhere basis. Any of the following networks: cellular networks, WLANs, and ad hoc and sensor networks can constitute an IHWN network. The user is free to roam within networks seamlessly based on his needs and network availability. However, the security concerns associated with the IHWN count for some of the challenges involved in its implementation. These concerns combined with the different security requirements of various constituent wireless networks may have made security a serious issue. Seamless transfer of user’s credentials is a major requirement when considering security during vertical handoff between two different types of networks. A security scheme that can fit all types of networks is difficult to propose. However, a reasonable architecture that keeps both security and user convenience into consideration can be designed. The existing security schemes fail to address mobility and scalability requirements. Considering the importance of these aspects in securing a global network, we propose a novel security scheme that uses two different security algorithms depending on the number of vertical handoffs made by the mobile node after the first authentication in the home network. It makes use of existing network elements, such as RADIUS and Diameter protocols and supports scalability, mobility, and secure key exchange. We also introduce a time factor which is pre-set between the home network and foreign network. It delegates the task of authorizing subsequent requests from mobile node to connect to a different foreign network. Finally, we evaluate the efficiency and scalability of the scheme and prove its superiority over the existing schemes. The simulation results show a significant improvement over messages exchanged during key distribution at the time of vertical handoff. They also show how the scheme provides an excellent solution for delegated authentication. For a fair comparison, we also analyze the existing key distribution schemes and discuss their limitations in supporting the user security needs in current wireless networks.
Raj Bhatnagar, PhD (Committee Chair)
George Purdy, PhD (Committee Member)
Ali Minai, PhD (Committee Member)
Qing An Zeng, PhD (Committee Member)
63 p.

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Rastogi, N. (2009). A Novel Security Scheme during Vertical Handoff in Integrated Heterogeneous Wireless Networks. (Electronic Thesis or Dissertation). Retrieved from https://etd.ohiolink.edu/

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Rastogi, Nidhi. "A Novel Security Scheme during Vertical Handoff in Integrated Heterogeneous Wireless Networks." Electronic Thesis or Dissertation. University of Cincinnati, 2009. OhioLINK Electronic Theses and Dissertations Center. 16 Dec 2017.

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Rastogi, Nidhi "A Novel Security Scheme during Vertical Handoff in Integrated Heterogeneous Wireless Networks." Electronic Thesis or Dissertation. University of Cincinnati, 2009. https://etd.ohiolink.edu/

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