NC&IS Web Spam The CCF Advanced Disciplines Lectures 彭波 pb@net.pku.edu.cn 北京大学信息科学技术学院 6/27/2010
Web Spam The CCF Advanced Disciplines Lectures 彭波 pb@net.pku.edu.cn 北京大学信息科学技术学院 6/27/2010
street spam email spam 25名 05 YOUVE GOT MAIL 直招 收72 92
street spam email spam
What Is Web Spam? Spamming any deliberate action solely in order to boost a web page's position in search engine results,incommensurate with page's real value ■ Spam web pages that are the result of spamming "Page 1...It's what we do." Approximately 10-15%of web pages are spam seo age
What Is Web Spam? ◼ Spamming = any deliberate action solely in order to boost a web page’s position in search engine results, incommensurate with page’s real value ◼ Spam = web pages that are the result of spamming ◼ Approximately 10-15% of web pages are spam
Why Web Spam Is Bad We appreciate your taking the time to help us improve our service for your fellow users around the world.By helping us eliminate spam,you're saving millions of people time,effort and energy. Google
Why Web Spam Is Bad We appreciate your taking the time to help us improve our service for your fellow users around the world. By helping us eliminate spam, you're saving millions of people time, effort and energy
Detecting Web Spam Spam detection:a classification problem "根据特征，判别一个网页/网站是否是spam? But what are the "salient features"? ·通过了解spamming技术来寻找特征 Finding the right features is "alchemy",not science ,Spammers也在不停的改进技术-it's an arms race!
Detecting Web Spam ◼ Spam detection: a classification problem ◼ 根据特征，判别一个网页/网站是否是spam？ ◼ But what are the “salient features”? ◼ 通过了解spamming技术来寻找特征 ◼ Finding the right features is “alchemy”, not science ◼ Spammers也在不停的改进技术 –it’s an arms race!