ACM Transactions on Computer Systems (TOCS)
A translation approach to portable ontology specifications
Knowledge Acquisition - Special issue: Current issues in knowledge modeling
Trust-based navigation in distributed systems
Computing Systems
Trust and deception in virtual societies
On the characterisation of a trusting agent - aspects of a formal approach
Trust and deception in virtual societies
A logic for uncertain probabilities
International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems
Valuation of Trust in Open Networks
ESORICS '94 Proceedings of the Third European Symposium on Research in Computer Security
A Subjective Metric of Authentication
ESORICS '98 Proceedings of the 5th European Symposium on Research in Computer Security
A reputation-based trust model for peer-to-peer ecommerce communities [Extended Abstract]
Proceedings of the 4th ACM conference on Electronic commerce
Supporting Trust in Virtual Communities
HICSS '00 Proceedings of the 33rd Hawaii International Conference on System Sciences-Volume 6 - Volume 6
Trust Relationships in Secure Systems-A Distributed Authentication Perspective
SP '93 Proceedings of the 1993 IEEE Symposium on Security and Privacy
A Logical Language for Expressing Authorizations
SP '97 Proceedings of the 1997 IEEE Symposium on Security and Privacy
Simplification and analysis of transitive trust networks
Web Intelligence and Agent Systems
VTrust: a trust management system based on a vector model of trust
ICISS'05 Proceedings of the First international conference on Information Systems Security
A survey of trust in internet applications
IEEE Communications Surveys & Tutorials
A Trust-Based Access Control Model for Pervasive Computing Applications
Proceedings of the 23rd Annual IFIP WG 11.3 Working Conference on Data and Applications Security XXIII
Towards Trustworthy Delegation in Role-Based Access Control Model
ISC '09 Proceedings of the 12th International Conference on Information Security
Modeling a trust cloud context
PIKM '10 Proceedings of the 3rd workshop on Ph.D. students in information and knowledge management
Using trust-based information aggregation for predicting security level of systems
DBSec'10 Proceedings of the 24th annual IFIP WG 11.3 working conference on Data and applications security and privacy
Trust-based security level evaluation using Bayesian belief networks
Transactions on computational science X
A context-aware reputation-based model of trust for open multi-agent environments
Canadian AI'11 Proceedings of the 24th Canadian conference on Advances in artificial intelligence
Towards trust in web content using semantic web technologies
ESWC'10 Proceedings of the 7th international conference on The Semantic Web: research and Applications - Volume Part II
Trust and reputation for information exchange in critical infrastructures
CRITIS'10 Proceedings of the 5th international conference on Critical Information Infrastructures Security
Evaluating trustworthiness from past performances: interval-based approaches
Annals of Mathematics and Artificial Intelligence
Security and Communication Networks
MMM-ACNS'12 Proceedings of the 6th international conference on Mathematical Methods, Models and Architectures for Computer Network Security: computer network security
International Journal of Security and Networks
A model for trust-based access control and delegation in mobile clouds
DBSec'13 Proceedings of the 27th international conference on Data and Applications Security and Privacy XXVII
International Journal of Wireless and Mobile Computing
The Journal of Supercomputing
A Role Based Privacy-Aware Secure Routing Protocol for Wireless Mesh Networks
Wireless Personal Communications: An International Journal
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Although the notion of trust is widely used in secure information systems, very few works attempt to formally define it or reason about it. Moreover, in most works, trust is defined as a binary concept--either an entity is completely trusted or not at all. Absolute trust on an entity requires one to have complete knowledge about the entity. This is rarely the case in real-world applications. Not trusting an entity, on the other hand, prohibits all communications with the entity rendering it useless. In short, treating trust as a binary concept is not acceptable in practice. Consequently, a model is needed that incorporates the notion of different degrees of trust. We propose a model that allows us to formalize trust relationships. The trust relationship between a truster and a trustee is associated with a context and depends on the experience, knowledge, and recommendation that the truster has with respect to the trustee in the given context. We show how our model can measure trust and compare two trust relationships in a given context. Sometimes enough information is not available about a given context to evaluate trust. Towards this end we show how the relationships between different contexts can be captured using a context graph. Formalizing the relationships between contexts allows us to extrapolate values from related contexts to approximate the trust of an entity even when all the information needed to calculate the trust is not available. Finally, we show how the semantic mismatch that arises because of different sources using different context graphs can be resolved and the trust of information obtained from these different sources compared.