Addressing packet forwarding misbehaviour using trust-based approach in Ad-hoc networks: A survey

Mobile ad hoc networks (MANETs) are spontaneously deployed over a geographically limited area without well-established infrastructure. In a distributed Mobile Ad Hoc Network (MANET), collaboration and cooperation is critical concern to managing trust. The networks work well only if the mobile nodes are trusty and behave cooperatively. Due to the openness in network topology and absence of a centralized administration in management, MANETs are very vulnerable to various attacks from malicious nodes. In order to reduce the hazards from such nodes and enhance the security of network, trust-based model is used to evaluate the trustworthiness of nodes. Trust-based approach provides a flexible and feasible approach to choose the shortest route that meets the security requirement of data packets transmission. This paper focuses on trust management with their properties and provides a survey of various trust-based approaches and it proposes some novel conceptions on trust management in MANETs.