A New Approach to Cold Start in Peer to Peer File Sharing Networks

TL;DR

This paper introduces a game-theoretic trust mechanism for P2P networks that addresses free riding and service reliability while enabling newcomers to join and participate actively.

Contribution

It presents a novel trust-based model that balances free rider mitigation and newcomer inclusion using game theory, improving network expansion.

Findings

Trust values of free riders and bad providers converge to finite levels.

Trust of good service providers increases monotonically over time.

The model effectively encourages active participation from newcomers.

Abstract

Solving free riding and selecting a reliable service provider in P2P networks has been separately investigated in last few years. Using trust has shown to be one of the best ways of solving these problems. But using this approach to simultaneously deal with both problems makes it impossible for newcomers to join the network and the expansion of network is prevented. In this paper we used the game theory to model the behavior of peers and developed a mechanism in which free riding and providing bad service are dominated strategies for peers. At the same time newcomers can participate and are encouraged to be active in the network. The proposed model has been simulated and the results showed that the trust value of free riders and bad service providers converge to a finite value and trust of peers who provide good service is monotonically increased despite the time they join the network.