
Tens of thousands of junk Web pages, created only to lure search-engine users to advertisements, are proliferating like billboards strung along freeways. Now Microsoft researchers say they have traced the companies and techniques behind them.
A technical paper published by the researchers says the links promoting such pages are generated by a small group of shadowy operators apparently with the acquiescence of some major advertisers, Web page hosts and advertising syndicators. The report is available at www.cs.ucdavis.edu/~hchen/paper/www07.pdf
The finding is striking because it hints at the possibility of curbing the practice.
The researchers uncovered a complex scheme in which a small group, creating false doorway pages, works with operators of Web-based computers who profit by redirecting traffic passed from search engines in one direction and then sending advertisements acquired from syndicators in the opposite direction.
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