In an open peer-to-peer information system, peers often have to interact with unfamiliar peers and need to manage the risk that is involved with the interactions. PeerTrust aims to develop a trust mechanism for such system so peers can quantify and compare the trustworthiness of other peers and perform trusted interactions based on their past interaction histories without trusted third parties.
1. How to build a trust model that assess the trustworthiness of peers accurately and effectively?
Accurate reflection of past experiences of peers
Robust against malicious behaviors of peers
Ability to adapt to different situations and communities
2. How to implement the trust model in a decentralized and secure manner?
3. How to use the trust model?
4. Experimental evaluation of the approach
1. Trust model
Identification of primitive trust parameters
Trust metrics including the basic metric and a suite of extensible and adaptive metrics
Case study with complaint based feedback system
2. Decentralized and secure trust management
Decentralized storage and lookup of trust data
PKI based secure trust data transmission
3. Usage of the trust model
Trust based peer selection algorithm
Decentralized trust policy management
4. Simulation based evaluation
Effectiveness of the mechanism
Cost of the mechanism
Benefit of the approach
Attack resistance under different attack scenarios