On Tradeoffs between Trust Accuracy and Resource Consumption in Communications and Social Networks
US Army Research Laboratory Adelphi United States
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Managing trust efficiently and effectively is critical in tactical networks in order to facilitate cooperation and decision making tasks as well as to meet system goals such as reliability, availability and scalability 1. The accuracy of evaluated trust values may significantly affect mission performance. However, acquiring evidence to evaluate trust accurately can require significant resources such as bandwidth, time and energy that are often severely constrained in mobile ad hoc networks MANETs. We study this tradeoff in a framework that balances the accuracy of evaluated trust with resource consumption. Our goal is to develop a general trust management framework that minimizes resource consumption e.g., communication overhead for trust formation, aggregation, and propagation while obtaining accurate measures of trust by entities. In particular, we investigate the impact of trust chain length, the use of indirect information to establish trust values, and the impact of misbehaving nodes on both communication overhead and the accuracy of evaluated trust relationships.