A Priori Trust Vulnerabilities in EigenTrust

We review the motivations underlying the design of the EigenTrust [4] algorithm for trust management in P2P file sharing networks, then illustrate through a simulated P2P network how EigenTrust’s reliance on pre-trusted peers undermines its other security requirements and can lead to severely compromised networks. We then explore a potential alternative to the use of pre-trusted peers, and demonstrate that EigenTrust can work without these vulnerable authorities.