Abstract: Mobile Ad hoc Network (MANET) is composed of mobile nodes which are connected by wireless links using without any pre-existing infrastructure. In network some nodes cooperate in order to work properly but some nodes not cooperate unwilling to forward packets to other nodes behave like selfish, leading to selfish node behavior. This leads to overall performance degradation. Watchdog detects selfish nodes it leads to wrong detection of false positive and false negative. More advanced technique is collaborative contact based watchdog technique based on diffusion of selfish node information when contact occurs but this approach doesn’t provide security like node authentication. This paper proposed secure collaborative contact based watchdog using hash chain it provide security in network to giving node authentication and reduces the effect of malicious nodes.
Keywords: MANETs, Hash chain, Selfish nodes, watchdog, Authentication.
| DOI: 10.17148/IJARCCE.2018.7630