Brief announcement: improving social-network-based sybil-resilient node admission control

We present Gatekeeper, a decentralized protocol that performs Sybil-resilient node admission control based on a social network. Gatekeeper can admit most honest nodes while limiting the number of Sybils admitted per attack edge to O(log k), where k is the number of attack edges. Our result improves over SybilLimit [3] by a factor of log n in the face of O(1) attack edges. Even when the number of attack edges reaches O(n/ log n), Gatekeeper only admits O(log n) Sybils per attack edge, similar to that achieved by SybilLimit. Categories and Subject Descriptors: C.2.4 [Computer Communication Networks]:Distributed Systems - distributed applications General Terms: Algorithms, Design, Security

• Type: Conference
• Year: 2010
• Where: PODC
• Authors: Nguyen Tran, Jinyang Li, Lakshminarayanan Subramanian, Sherman S. M. Chow
• Keywords: Attack Edge, Distributed And Parallel Computing, Honest Nodes, PODC 2010, Sybil-resilient Node Admission