... Sprite, a simple, cheat-proof, credit-based system for stimulating cooperation among selfish nodes in mobile ad hoc networks. Our system provides incentive for mobile nodes to cooperate and report actions ... of our system. In summary, the contributions of this paper are the follow-ing. First, we present Sprite, a system to provide incentiveto selfish mobile nodes to cooperate. Second, our system ... provide incentive is to use a reputation system [4], [7], [8], [9]. For example, in [4], Marti et al.proposed a reputation system for ad hoc networks. In their system, a node monitors the transmission...