Partial identities as a foundation for trust and reputation

Partial identities as a foundation for trust and reputation

This paper explores the relationships between the hard security concepts of identity and privacy on the one hand, and the soft security concepts of trust and reputation on the other hand. We specifically focus on two vulnerabilities that current trust and reputation systems have: the change of identity and multiple identities problems. As a result, we provide a privacy-preserving solution to th...

Reputation as a Basis for Trust

Virtual Fingerprinting as a Foundation for Reputation in Open Systems

The lack of available identity information in attribute-based trust management systems complicates the design of the audit and incident response systems, anomaly detection algorithms, collusion detection/prevention mechanisms, and reputation systems taken for granted in traditional distributed systems. In this paper, we show that as two entities in an attribute-based trust management system int...

A probabilistic model for trust and reputation

This paper concerns the problem of agent trust in an electronic market place. We maintain that agent trust involves making decisions under uncertainty and therefore the phenomenon should be modelled probabilistically. We therefore propose a probabilistic framework that models agent interactions as a Hidden Markov Model (HMM). The observations of the HMM are the interaction outcomes and the hidd...

A Calculus for Trust and Reputation Systems

Trust and reputation models provide soft-security mechanisms that can be used to induce cooperative behaviors in user-centric communities in which user-generated services and resources are shared. The effectiveness of such models depends on several, orthogonal aspects that make their analysis a challenging issue. This paper aims to provide support to the design of trust and reputation infrastru...