A Trust Model for an Open, Decentralized Reputation System

Abstract

Summary. The use of reputation systems has been proposed for various applications, e. g., to estimate the trustworthiness of sellers and buyers in electronic transactions. Reputation systems collect opinions of users about properties of certain services, subjects and other users and evaluate these opinions. It is important that the results of reputation systems are consistent with intuitive expectations of its users, which highly depends on the properties of the underlying trust model. The trust model defines the representation of the trust values as well as the computation of trust values for derived trust relations.We propose a new sophisticated computational model of trust which seamlessly integrates authentication verification into the trust evaluation process and which is suitable especially for open, decentralized reputation systems. It consists of definitions of trust and authentication relations, inference rules and three downward compatible trust calculi. It is therefore possible to represent and evaluate trust values with different levels of detail. The model reflects all relevant aspects and properties of trust and authentication relations and therefore avoids any counterintuitive effects.

Referencing Tool for Reputation and Trust in Wireless Sensor Networks

“…In wireless sensor networks, reputation is defined as a sensor node having the opinion that neighbouring nodes will function as expected with reference to past performance. With reference to Figure 1, reputation systems within a WSN can be characterized as follows [2]:…”

A Rough Sets-based Agent Trust Management Framework

“…Trust management in open systems plays a key role in today's growing need for such systems [1]. On the other hand, openness is one of the key requirements for businesses.…”

“…We employ a machine translation method [35] for translating the user's query to the target language if required. For this purpose, we make use of two online translation services: Google translate 1 and Babylon 2 .…”

Examining Trust, Forgiveness and Regret as Computational Concepts

“…Approaches range from Trust Management [39,49,25,42], where there is a need to determine trust or its propagation via trusted others, to trust models [64,1,84], which enable individual agents to model other with trust as at least a component, if not the major one, of the model. Additionally, regret is, as has been noted above, not a new phenomenon of study, particularly in the economic sciences [7,57,16,35,93].…”