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2004
ACM

Propagation of trust and distrust

9 years 7 months ago
Propagation of trust and distrust
A (directed) network of people connected by ratings or trust scores, and a model for propagating those trust scores, is a fundamental building block in many of today's most successful e-commerce and recommendation systems. We develop a framework of trust propagation schemes, each of which may be appropriate in certain circumstances, and evaluate the schemes on a large trust network consisting of 800K trust scores expressed among 130K people. We show that a small number of expressed trusts/distrust per individual allows us to predict trust between any two people in the system with high accuracy. Our work appears to be the first to incorporate distrust in a computational trust propagation setting. Categories and Subject Descriptors H.3.3 [Information Storage and Retrieval]: Information Search and Retrieval; H.3.5 [Information Storage and Retrieval]: Online Information Services--Web based services; G.1 [Numerical Analysis]: Numerical Linear Algebra; G.2 [Discrete Mathematics]: Graph...
Ramanathan V. Guha, Ravi Kumar, Prabhakar Raghavan
Added 22 Nov 2009
Updated 22 Nov 2009
Type Conference
Year 2004
Where WWW
Authors Ramanathan V. Guha, Ravi Kumar, Prabhakar Raghavan, Andrew Tomkins
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