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Abstract-Cloud computing is used to share computing resources and data over internet.When sensitive data is shared over Internet, it should be transferred in secured manner. Data security is ensured using Identity Based Encryption mechanism. In the existing Cloud Computing system which is implemented using Identity Based Encryption mechanism, authorized user can share their credential to unauthorized user and data can be accessed by unauthorized user who hasn't subscribed to Cloud Computing System. To overcome this issue, we propose a notion called Extended Identity Based Encryption(E-IBE) system, which ensures authentication and confidentiality. In this approach, we use Kerberos authentication protocol along with Identity Based Encryption methodology to ensure authentication and confidentiality.

In recent years, WiFi offloading provides a potential solution for improving ad hoc network performance along with cellular network. This paper reviews the different offloading techniques that are implemented in various applications. In disaster management applications, the cellular network is not optimal for existing case studies because the lack of infrastructure. MANET Wi-Fi offloading (MWO) is one of the potential solutions for offloading cellular traffic. This word combines the cellular network with mobile ad hoc network by implementing the technique of Wi-Fi offloading. Based on the applications requirements the offloading techniques implemented into mobile-to-mobile (M-M), mobile-to-cellular (M-C), mobile-to-AP (M-AP). It serves more reliability, congestion eliminated, increasing data rate, and high network performance. The authors also identified the issue while implementing the offloading techniques in network. Finally, this paper achieved the better performance results compared to existing approaches implemented in disaster management.

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