  Geographic routing offers guaranteed packet deliv- ery in a dense network. In
this routing, packets are forwarded to a node which is nearer to the
destination with an extensive use of location information. However, research
studies in Mobile Adhoc Networks (MANETs) and Wireless Sensor Networks (WSNs)
have shown that packet delivery percentage can degrade substantially when
malicious nodes are found in the network. Conventional cryptography techniques
can be adopted in order to deal with ma- licious nodes, but they cannot
mitigate outsider attacks. In recent years, a societal pattern called trust is
used as a tool to mitigate security attacks. Numerous researchers have proposed
security solutions by adopting trust in routing algorithms. However, each
solution has its own strength and weakness. In this paper, an integrated
approach by using reputation and weight based trust systems backed by Greedy
Perimeter Stateless Routing (BT-GPSR) is presented. The proposed approach
outperforms the conventional reputation and weight based methods. The
effectiveness of the proposed BT-GPSR is validated through simulation.
