This document proposes a Trusted AODV (TAODV) routing protocol to secure ad hoc networks. TAODV extends the AODV routing protocol and uses a trust model to represent trust relationships between nodes. In TAODV, a node's trust in another is represented by an opinion that considers belief, disbelief, and uncertainty. Opinions are updated over time based on successful or failed communications. TAODV introduces a trust recommendation mechanism to exchange trust information between nodes. The protocol performs trusted routing discovery and maintenance based on nodes' trust opinions of one another to improve security and efficiency compared to cryptographic approaches.