(1)
To clarify before even beginning, Yahoo! does not necessarily uses these techniques, they are just patent applications issued by Yahoo!
Bill Slawski posted an outstanding blog entry at SEW Blog named In Yahoo We Trust - The Link Spam Patent Application discusses one of Yahoo!'s papers and a patent application on fighting Web search spam.
(1) Combating Web Spam with TrustRank which discusses how non spam pages link to non spam pages, as Bill describes in short.
(2) Link-based spam detection which describes, similar to PageRank, the ability to "manually identifying reputable seed pages" and "separating reputable pages from spam pages."
Forum discussion on these topics at Cre8asite Forums & Search Engine Watch Forums.
Comments:
Search Engines WEB
05/05/2006 09:41 pm
These ideas have been explored by Google and MSN and ASK (expert rank)...and to some degree are being used. Google Engineers have already gone on record as Banning sites for so-call Link Spam. ================================== Here is one controversial item that may no longer be as valid.... "The care with which people add links to their pages is often inversely proportional to the number of links on the page." This should be re evaluated - because there are so many great Web services and tutorials available - that you can literally have dozens of great RELATED links on one page for the purpose of allowing your readers to filter those technical differences among many great services.