Toward an optimal social network defense against Sybil attacks

Peer-to-peer and other decentralized,distributed systems are known to be particularly vulnerable to sybil attacks. In a sybil attack,a malicious user obtains multiple fake identities and pretends to be multiple, distinct nodes in the system. By ...

Open-access distributed systems such as peer-to-peer systems are particularly vulnerable to sybil attacks, where a malicious user creates multiple fake identities (called sybil nodes). Without a trusted central authority that can tie identities to real ...

Reputation mechanisms of a network or p2p applications can be compromised by a large number of fake or stolen identities recommending higher trust values of a malicious node. A high trust value classify such malicious or selfish nodes as ...