A mobile ad-hoc network (MANET) is a group of wireless mobile devices or nodes that communicate with each other without any help of a pre-installed infrastructure and centralized access points. Security is the most important concern for the functionality of network in MANET. MANET is unsecure from various attacks in the routing path and understanding the form of attacks is always the primary step towards the secured communication between mobile nodes. A number of attacks affect the safe exchange of information in MANET and among them the occurrence of black hole attack causes several limitations such as fault tolerance, packet loss, denial of service and jamming of network while transmitting data between nodes in the route. In order to preserve the security of MANET from attacks, routing protocols are important to ensure proper functioning of the path from source to destination nodes. In this research paper an improved dynamic source routing (IDSR) technique has been proposed to detect and remove the black hole attack nodes in the routing path and ensures reliable communication between nodes by constructing the black hole attack free route in MANET.

MANET, black hole attack, routing protocols, dynamic source routing technique

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