1. 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)

2. Outline Introduction Motivation Polling protocol
Splitting and recomposing of the node’s reputation value
Shamir-based multi-path transmission
Conclusion
Comments

3. Introduction
Gnutella network
Decentralized network

4. 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

5. Motivation
When polling nodes transmit the responding node’s reputation nodes:
Encryption free protocol
Integrity
Man-in-the-middle attack

6. Polling protocol

7. Splitting and recomposing of the node’s reputation value

8. Shamir-based multi-path transmission

9. Conclusion
Proposed an encryption-free reputation sharing protocol for Gnutella-like P2P network.

10. Comments Polling nodes: Transmission overhead.
Nodes can sent the wrong msg.
Nodes can not be trusted.
Malicious nodes can be polling nodes.
Transmission overhead.