Abstract-A mobile ad-hoc network is a self-configuring network of mobile hosts connected by wireless links which together form an arbitrary topology. Due to lack of centralized control, dynamic network topology and multihop communications, the provision of making routing secure in mobile ad hoc networks is much more challenging than the security in infrastructure based networks. Several protocols for secure routing in ad hoc networks have been proposed in the literature. But due to their limitations, there is a need to make them robust and more secure so that they can go well with the demanding requirements of ad hoc networks. This paper presents a survey of trust based secure routing protocols for mobile ad hoc networks. Different trust based secure routing protocols are discussed and analyzed in the paper along with their strengths, weaknesses and future enhancements.Index Terms-Routing protocol, trust based secure routing, ad hoc networks.