Trustworthy acquaintances in Peer-to-Peer (P2P) overlay networks. (27th January 2011) - Sawamura, Soichi
In fully distributed Peer-to-Peer (P2P) overlay networks, each peer has to obtain information on objects distributed through communicating with its acquaintance peers. An acquaintance might hold obsolete information owing to the propagation delay and faults of peers. Hence, a peer has to collect correct object information only from trustworthy acquaintances. The subjective trustworthiness of an acquaintance is obtained by directly interacting with the acquaintance. The objective trustworthiness of an acquaintance is obtained by collecting the subjective trustworthiness from other peers. If a peer is confident of its own subjective trustworthiness, the peer takes the subjective trustworthiness. Otherwise, the peer takes the objective one. We evaluate how the subjective trustworthiness changes in change of satisfiablity of an acquaintance.