Date Added: Jan 2012
Network coding involves packets being combined at intermediate nodes inside the network. Depending on whether packets from the same or different sessions are combined, network coding is classified as intra-session or inter-session, respectively. Inter-session coding, that is the focus of this paper, has been implemented in practice, such as in wireless mesh networks, and streaming gestures. The mixing nature of network coding makes it extremely vulnerable to pollution attacks. In such an attack, malicious nodes inject corrupted packets that are combined and forwarded by downstream nodes, resulting in a large number of corrupted packets propagating in the network.