As Web-based online communities are rapidly growing, the agents in social groups need to know their measurable belief of trust for safe and successful interactions. In this paper, we propose a formal model of reputation resulting from available feedbacks in online communities. The notion of trust can be defined as an aggregation of consensus given a set of reputations. The expected trust of an ...

In this paper, we propose a trust-based message propagation and evaluation framework to support the effective evaluation of information sent by peers and the immediate control of false information in a VANET. More specifically, our trust-based message propagation collects peers trust opinions about a message sent by a peer (message sender) during the propagation of the message. We improve on an...

Abstract The negative linkage between income inequality and social trust is widely acknowledged. Despite this consensus, it remains unclear at what level of aggregation matters most to the cultivation trust. In a comprehensive review, Wilkinson Pickett (Annu Rev Sociol 35:493–511, 2009) speculate that important when measured societal level, whereas for lower units economic development becomes s...

Computational Trust and Reputation (CTR) systems are platforms capable of collecting trust information about candidate partners and of computing confidence scores for each one of these partners. These systems start to be viewed as vital elements in environments of electronic institutions, as they support fundamental decision making processes, such as the selection of business partners and the a...

In existing trust models, the recommending services often provide a single trust value (computed by them during their interaction with the unknown entity in question) as a recommendation. However, a single trust value recommended by a recommender represents its subjective opinion about the unknown entity and cannot depict the real trust level very well under certain circumstances. To solve this...

A Trust Management model that provides a measure of the degree to which a principal is trusted for some action is proposed. At the heart of the model is the notion that triangular norms and conorms provide a natural and consistent interpretation for trust aggregation across delegation chains. It is argued that specifying how trust is aggregated is as important as specifying a degree of trust va...

Trust networks are social networks in which users can assign trust scores to each other. In order to estimate these scores for agents that are indirectly connected through the network, a range of trust score aggregators has been proposed. Currently, none of them takes into account the length of the paths that connect users; however, this appears to be a critical factor since longer paths genera...

The key to the success of a P2P reputation system is the feedbacks aggregating mechanism. Based on human cognitive psychology, Tree-Trust, a novel reputation model is introduced, in which the concept of direct trust tree (DTT) is presented innovatively. The main contributions include: (1) in Tree-Trust, feedbacks are searched by using DTT instead of in broadcast way of other work, which makes t...

Data aggregation in wireless sensor networks is widely accepted as an essential paradigm for energy efficient routing but with low reliability under node and link failures. In wireless sensor networks, malicious sensor nodes send false data reports to distort aggregation results. Existing trust systems rely on general reputation to mitigate the effect of this attack. This paper presents one of ...