Service discovery in Mobile Ad hoc networks is highly crucial due to the lack of centralized infrastructure. Furthermore, varieties of services available through the network may require different levels of security. Thus, a need arises for formulating and deploying an efficient trust oriented service discovery mechanism distributed in each and every node in the ad hoc scenario in order to reduce the complexity in providing the services to the network users. In this paper, we have proposed a Kuder-Richardson co-efficient based trust mechanism (KRCBM) for service discovery in MANET. This effective mechanism works with the aid of the trust value called Kuder-Richardson co-efficient, which manipulates the reliability of the group of nodes participating in the ad hoc environment. This trust model possesses an inherent ability of designating various protection levels for services discovery. Based on the designated level of the services, secure communication is established. The performances of KRCBM are analyzed through ns-2 simulations with the help of performance metrics like packet delivery ratio, Control Overhead and total overhead. From the simulation results obtained, it is proved that the proposed mechanism performs well when compared to the other trust based mechanisms available in the literature by reducing the packet drops to a maximum extent.
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