Sniper: A social relationship based defence for Network Coordinate Systems

Network Coordinate Systems (NCS) allow accurate latency estimation with low measurement overhead. However, NCS are vulnerable to attacks, which makes security issue a crucial concern in their large-scale deployment. This paper proposes Sniper, a social relationship based defence mechanism for securing NCS. In contrast to prior proposals that allow attacks to occur and then detect them, Sniper can filter out potential malicious nodes before they mount attack. Extensive simulations demonstrate that Sniper can protect NCS against various forms of attacks efficiently and that Sniper can tolerate a large fraction of malicious nodes.