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Reputation systems are an essential part of electronic marketplaces that provide a valuable method to identify honest sellers and punish malicious actors. Due to the continuous improvement of the computation m...
Personas are a common tool used in Human Computer Interaction to represent the needs and expectations of a system’s stakeholders, but they are also grounded in large amounts of qualitative data. Our aim is to ...
We introduce the notion of digital-arbitration which enables resolving disputes between servers and users with the aid of arbitrators. Arbitrators are semi-trusted entities in the social network that facilitate c...
Wireless sensor network consists of a large number of resource constrained sensor nodes. These sensor nodes communicate over wireless medium to perform a variety of information processing functionality. Due to...
The extent to which an agent trusts another naturally depends on the outcomes of their interactions. Previous computational approaches have treated the outcomes in a domain-specific way. Specifically, these ap...
The amount and variety of information currently available online is astounding. Information can be found covering any subject and is accessible from any part of the globe. While this is beneficial for countles...
Time sequence data relating to users, such as medical histories and mobility data, are good candidates for data mining, but often contain highly sensitive information. Different methods in privacy-preserving d...
We propose a generic testbed for evaluating social trust models and we show how existing models can fit our tesbed. To showcase the flexibility of our design, we implemented a prototype and evaluated three tru...
While trust management systems can be used in isolation in order to provide robustness to a given architecture, cooperation incentives can be used to complement and collaborate with trust management systems as...
This paper explores whether trust, developed in one context, transfers into another, distinct context and, if so, attempts to quantify the influence this prior trust exerts. Specifically, we investigate the ef...
Reputation systems have been extensively explored in various disciplines and application areas. A problem in this context is that the computation engines applied by most reputation systems available are design...
The increasing use of Electronic Health Records has been mirrored by a similar rise in the number of security incidents where confidential information has inadvertently been disclosed to third parties. These p...
Often in open multiagent systems, agents interact with other agents to meet their own goals. Trust is, therefore, considered essential to make such interactions effective. However, trust is a complex, multifac...
In an online marketplace, buyers rely heavily on reviews posted by previous buyers (referred to as advisors). The advisor’s credibility determines the persuasiveness of reviews. Much work has addressed the eva...
Identity management is a rather general concept that covers technologies, policies and procedures for recognising and authenticating entities in ICT environments. Current identity management solutions often ha...
In this work we present a thorough quantitative analysis of information consumption patterns of qualitatively different information on Facebook. Pages are categorized, according to their topics and the communi...
A principal carrying out a delegation may not be certain about the state of its delegation graph as it may have been perturbed by an attacker. This perturbation may come about from the attacker concealing the ...
In this paper, we offer an algorithm for intelligent decision making about travel path planning in mobile vehicular ad-hoc networks (VANETs), for scenarios where agents representing vehicles exchange reports a...
Schemes for multi-party trust computation are presented. The schemes do not make use of a Trusted Authority. The schemes are more ein a completely distributed manner, where each user calculates its trust value...
Due to the frequency with which smartphone owners use their devices, effortful authentication methods such as passwords and PINs are not an effective choice for smartphone authentication. Past research has off...
Public displays may adapt intelligently to the social context, tailoring information on the screen, for example, to the profiles of spectators, their gender or based on their mutual proximity. However, such ad...
Information is the currency of the digital age – it is constantly communicated, exchanged and bartered, most commonly to support human understanding and decision-making. While the Internet and Web 2.0 have bee...
Crowdsourcing provides a valuable means for accomplishing large amounts of work which may require a high level of expertise. We present an algorithm for computing the trustworthiness of user-contributed tags o...
A Sybil attack consists of an adversary assuming multiple identities to defeat the trust of an existing reputation system. When Sybil attacks are launched in vehicular networks, the mobility of vehicles increa...
