- TrustRank
TrustRank is a
link analysis technique described in a paper byStanford University andYahoo! researchers for semi-automatically separating usefulwebpage s from spam. [cite journal
last = Gyöngyi
first = Zoltán
authorlink =
coauthors =Hector Garcia-Molina , Jan Pedersen
title = Combating Web Spam with TrustRank
journal = Proceedings of the International Conference on Very Large Data Bases
volume = 30
issue =
pages = 576
publisher =
location =
date = 2004
url = http://www.vldb.org/conf/2004/RS15P3.PDF
doi =
id =
accessdate = 2007-10-26 ]Many Web spam pages are created only with the intention of misleading
search engine s. These pages, chiefly created for commercial reasons, use various techniques to achieve higher-than-deserved rankings on the search engines' result pages. While human experts can easily identify spam, it is too expensive to manually evaluate a large number of pages.One popular method for improving rankings is to increase artificially the perceived importance of a document through complex linking schemes.
Google 'sPageRank and similar methods for determining the relative importance of Web documents have been subjected to manipulation.TrustRank method calls for selecting a small set of seed pages to be evaluated by an expert. Once the reputable seed pages are manually identified, a crawl extending outward from the seed set seeks out similarly reliable and trustworthy pages. TrustRank's reliability diminishes as documents become further removed from the seed set.
The researchers who proposed the TrustRank methodology have continued to refine their work by evaluating related topics, such as measuring
spam mass .References
See also
*
PageRank
*Hilltop algorithm
*Spamdexing External links
* [http://www.vldb.org/conf/2004/RS15P3.PDF Z. Gyöngyi, H. Garcia-Molina, J. Pedersen: "Combating Web Spam with TrustRank"]
* [http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220060095416%22.PGNR.&OS=DN/20060095416&RS=DN/20060095416 Link-based spam detection] Yahoo! assigned patent application using Trustrank
* [http://pagerank.suchmaschinen-doktor.de/trustrank.html TrustRank algorithm explained]
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