William Kozma

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Wireless ad hoc networks rely on multi-hop routes to transport data from source to destination. The routing function is implemented in a collaborative manner, with each node responsible for relaying traffic to the destination. However, an increasingly sophisticated pool of users with easy access to commercial wireless devices, combined with the poor(More)
We address the problem of identifying and isolating misbehaving nodes that refuse to forward packets in multi-hop ad hoc networks. We develop a comprehensive system called Audit-based Misbehavior Detection (AMD) that effectively and efficiently isolates both continuous and selective packet droppers. The AMD system integrates reputation management,(More)
We address the problem of identifying misbehaving nodes that (selectively) drop packets, in order to degrade the network performance. Such nodes may agree to forward packets by participating in the route discovery process, but refuse to do so once the packets have been received. We propose a reactive approach where the source initiates an audit process if a(More)