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The Byzantine Agreement (BA) plays a key role in fault-tolerant distributed system design. More existing BA protocols are designed for wired networks. In practice, wireless and mobile computing are becoming increasingly popular; the topology of network is trending wireless and provides support for mobile computing. Mobile Ad-hoc Network (MANET) is a kind of popular wireless network. The proposed protocol can make each fault-free mobile processor reach an agreement value to cope with the faulty component in the virtual subnet of MANET.

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Mobile Ad-hoc Network (MANET) is practical more and more due to it can provide processor joins to the network or leaves away anytime with noninfrastructure. Further, the fault-tolerance and reliability of the MANET has also been an important topic. The problem of reaching agreement in the distributed system is one of the most important issues to design a fault-tolerance system. In previous works, reach a common agreement among correct processors to cope with the influence from faulty components is significant in a fault-tolerance system. In this paper, the agreement problem is revisited in a MANET, which the processors maybe subject to malicious failure.