Computing Trust Resultant using Intervals
Publish place: 08th Iranian Security Community Conference
Publish Year: 1390
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISCC08_033
تاریخ نمایه سازی: 11 مهر 1390
Abstract:
An important problem in trust management area is to evaluate the trust value among two nodes in a web of trust using intermediate nodes. This is widely used when the source node has no experience of direct interaction with the target. If trust is used to support decision making, it is important to have not only an accurate estimate of trust, but also a measure of confidence in the intermediate nodes and in the final estimated value of trust. In this paper we introduce a novel approach for representation of trust and confidence -both together- using intervals. Based on this representation, we then propose a kind of summation operation that is a method for calculating the resultant of trust opinions. We show that this operator is more accurate for evaluation of trust resultant than the usual method of weightedaveraging. We also report and analyze the results of experiments carried out on a well-known trust dataset which show that our proposed method reduces the average absolute difference and increases the correlation among the inferred and direct values of trust comparing to the weighted-averaging method.
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Authors
Hassan Shakeri
Department of Computer Ferdowsi University of Mashhad Mashhad - Iran
Abbas Ghaemi Bafghi
Department of Computer Ferdowsi University of Mashhad Mashhad - Iran
Hadi Sadoghi Yazdi
Department of Computer Ferdowsi University of Mashhad Mashhad - Iran