Date Added: Aug 2012
Secure routing is an important issue in MANETs. A particularly devastating attack in wireless networks is the black hole attack. The performance of ad hoc networks depends on cooperation and trust among distributed nodes. To enhance security in ad hoc networks, it is important to evaluate trustworthiness of other nodes without centralized authorities. As a result, an efficient algorithm to detect black hole attack is important. In this paper, to improve the quality a modified design of trust based dynamic source routing protocol is proposed. Each node would evaluate its own trusted parameters about neighbors through evaluation of experience, knowledge and recommendations. This protocol discovers multiple loop-free paths which are evaluated by hop count and trust.