A Survey on Security attacks and their prevention over Wireless Ad hoc Network

computer engg.

In the last few decades, we have seen the proliferation of wireless communications technologies. Wireless technologies are being widely used today across the globe to support the communications needs of very large numbers of end users. Rapid and automatic establishment of wireless networks and services in the absence of a fixed infrastructure is one of the big challenges of communication. Wireless Ad-hoc networks form a relatively new and very diverse field of research. Wireless Ad-hoc networks are decentralized, self-organizing networks capable of forming a communication network without relying on any fixed infrastructure. Wireless Ad-hoc networks have distinct advantages over traditional communication networks. The main goal of wireless ad hoc networks is to allow a group of communication nodes to set up and maintain a network among themselves, without the support of a base station or a central controller. Nodes in most traditional networks use their resources only for data communications, while the infrastructure runs centralized algorithms in determining optimal network behavior. In contrast, ad hoc and sensor network node resources must support network formation and management activities, in addition to data communication. Security and QoS in ad hoc wireless networks have recently become very important and actively researched topics because of a growing demand to support live streaming audio and video in civilian as well as military applications. The wireless links between nodes are highly susceptible to link attacks, which include passive eavesdropping, active interfering, leaking secret information, data tampering, impersonation, message replay, message distortion, and denial of service. In this paper, we provide a comprehensive overview on different types security flaws and their possible prevention schemes over Wireless Ad hoc Networks.

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