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(to be completed)

 


ThinkMind // International Journal On Advances in Security, volume 2, numbers 2 and 3, 2009 // View article sec_v2_n23_2009_9


Enhancing Information Reliability through Backwards Propagation Of Distrust

Authors:
Panagiotis Metaxas

Keywords: Web search; Information Reliability; Web graph; Link structure; Web Trust; Web Spam

Abstract:
Search Engines have greatly influenced the way we experience the web. Since the early days of the web people have been relying on search engines to find useful information. However, their ability to provide useful and unbiased information can be manipulated by Web spammers. Web spamming, the practice of introducing artificial text and links into web pages to affect the results of searches, has been recognized as a major problem for search engines. But it is mainly a serious problem for web users because they tend to confuse trusting the search engine with trusting the results of a search. In this paper, first we discuss the relationship between Web spam in cyber world and social propaganda in the real world. Then, we propose “backwards propagation of distrust,” as an approach to finding spamming untrustworthy sites. Our approach is inspired by the social behavior associated with distrust. In society, recognition of an untrustworthy entity (person, institution, idea, etc) is a reason for questioning the trustworthiness of those that recommended this entity. People that are found to strongly support untrustworthy entities become untrustworthy themselves. In other words, in the society, distrust is propagated backwards. Our algorithm simulates this social behavior on the web graph with considerable success. Moreover, by respecting the user’s perception of trust through the web graph, our algorithm makes it possible to resolve the moral question of who should be making the decision of weeding out untrustworthy spammers in favor of the user, not the search engine or some higher authority. Our approach can lead to browser-level, or personalized server-side, web filters that work in synergy with the powerful search engines to deliver personalized, trusted web results. An earlier version of this paper was presented at [35].

Pages: 214 to 225

Copyright: Copyright (c) to authors, 2009. Used with permission.

Publication date: December 1, 2009

Published in: journal

ISSN: 1942-2636

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