Partition and multi-path transmission-An encryption-free reputation sharing protocol in Gnutella-like peer-to-peer network Author: X. X. Ma, and Z. G. Qin Source: Computer Communications, In press Speaker: Shu-Fen Chiou (邱淑芬)
Outline Introduction Motivation Polling protocol Splitting and recomposing of the node’s reputation value Shamir-based multi-path transmission Conclusion Comments
Introduction Gnutella network Decentralized network
Introduction Gnutella-like network B Query Responding node Reply 1.mp3 Problems: A’s public key created by inself without validation Initial node Reply APk(s) Ask B’s reputation value s C polling node
Motivation When polling nodes transmit the responding node’s reputation nodes: Encryption free protocol Integrity Man-in-the-middle attack
Polling protocol
Splitting and recomposing of the node’s reputation value
Shamir-based multi-path transmission
Conclusion Proposed an encryption-free reputation sharing protocol for Gnutella-like P2P network.
Comments Polling nodes: Transmission overhead. Nodes can sent the wrong msg. Nodes can not be trusted. Malicious nodes can be polling nodes. Transmission overhead.