PolarityTrust is a Trust and Reputation System that demotes malicious users in Social Networks.
F. Javier Ortega; José A. Troyano; Fermín L. Cruz; Fernando Enríquez de Salamanca. “PolarityTrust: Measuring Trust and Reputation in Social Networks”. Fourth International Conference on Internet Technologies and Applications (ITA’11). Wrexham, North Wales, United Kingdom.