A mobile adhoc network is a Self-configuring network of mobile routers connected by wireless links.In the mobile adhoc network, each and every device moves independently in any direction so that there are frequent changes in the links.It is essential to learn the position of the neighbors because there is increase in location-aware services.So, there is a chance that the malicious nodes are easily abused the process.The significant problem in mobile networks is correctness of node locations and also it is primarily challenging in the presence of adversaries.So, the neighbor position verification protocol is used to a fully distributed, a lightweight NPV procedure which allows each node to obtain the locations advertised by its neighbors and asses their truthfulness.Further to extend neighbor position verification protocols in the proactive model that need to each node constantly verify the position of its neighbors.So, we introduce a technique called secure link state updating which provides secure proactive topology discovery that is multiply useful for the network operation.This technique is vigorous against individual attackers, it is capable to adjust its capacity between local and network-wide topology discovery, and also operating in networks of frequently changing topology and membership nodes.Experimental results show that the proposed system is high efficiency in terms of security when compared to the existing system.
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