1 partition and multi-path transmission-an encryption-free reputation sharing protocol in...

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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. QinSource: Computer Communications, In pressSpeaker: Shu-Fen Chiou ( 邱淑芬 )

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Outline Introduction Motivation Polling protocol Splitting and recomposing of the node’s r

eputation value Shamir-based multi-path transmission Conclusion Comments

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Introduction

Gnutella network Decentralized network

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Introduction

Gnutella-like network

A

B

Query

1.mp3 Reply

CAsk B’s reputation value s

Reply APk(s) Problems:A’s public key created by inself without validation

Initial node

polling node

Responding node

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Motivation

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

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Polling protocol

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Splitting and recomposing of the node’s reputation value

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Shamir-based multi-path transmission

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Conclusion

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

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Comments

Polling nodes: Nodes can sent the wrong msg. Nodes can not be trusted. Malicious nodes can be polling nodes.

Transmission overhead.