The battle between anti-spam and spam-

The first round of counterattack is to rely more on the body of the page than the meta tag when sorting. But spam to go back, in the body of the text in a large number of the same color with the page background keywords, in the picture comment text into the keyword, in the page code to add "invisible notes." The search engine began a second round of counterattack, and they found effective ways to filter out the unseen text.

The spider of the search engine will Self-report when visiting any website, and check the website's access rules, according to the rules of each website. So, SEO with the production of two sites, a dedicated user access, a dedicated search engine access, "picking", this method is called cloaking (jacket).

In foreign countries, in fact, early in the last century, SEO spam has become a big hit. According to a 1998 survey, the main search engine searched for the popular words "Monica Lewinsky" (Monica Lewinsky), the homepage of each search engine actually has 40% of the search results are spam site.

Search engines can only look for new relevance sorting basis, or cheaters can not control the sort basis, that is, to the site to find the basis for sorting. So, there was a super-chain analysis, appeared PageRank. The principle of the super-chain analysis is to look at the same kind of links between Web pages as an important basis, and then, according to the weight of each website and so on to comprehensive analysis. In this way, Gov (government website) and Edu (education website) are usually given higher rankings, and the hyperlinks from Gov and Edu are also of higher value.

But spam to do a lot of web site, to prepare a large number of links, which customers pay, all the pages give it a link. This SEO method is called link farm. The anti-spam approach is based on the discovery of link farm and identified this as a cheat site.

According to a forum on a webmaster disclosed, at present, in China has formed a huge SEO spam market, according to anti-spam experts Wang an estimate, China to make a living in the number of about hundreds of thousands of, its website is up to millions of. On the Internet, there are many SEO sites, they play a variety of flags to "guide" people cheat, and in the above talk about experience.

These SEO spam "depend on the survival" The way mainly is the following two kinds: 1. Using search engines to attract website traffic-driven advertising revenue; 2. Trafficking is ranked by the higher keywords obtained by cheating on search engines. Website traffic to independent IP computing, according to the owners of the disclosure, their daily 5,000 independent IP access, only to join the film broadband and other 3 of the Advertising Alliance, monthly income has reached about 1300 yuan. And a Baidu is included about 20,000 of the Web site to do traffic, the daily IP will quickly rise to 40,000.

Wave upon Wave's spam

SEO spam destructive is quite huge, it not only directly destroys hundreds of millions of of daily user search experience ——— This is the search engine site survival is the key, but also destroyed the search engine to obtain the main source of revenue ——— bid rankings and related ads.

According to the relevant statistics, in all the pages, the exclusion of invalid pages, cheat pages accounted for the entire page 10%, in some popular keywords search, its top 50 pages, the proportion of spam web pages can even up to 80%.

In China, Google has been a gentleman image, but it also has a time of anger.

March 26, 2005 4 o'clock in the morning, the unbearable Google suddenly exerting force, will be a large number of spam site cleanup. Google's page was restored to its previous clean.

But in less than 4 months, the Web site of the website is flooded. Google has also been working on anti-spam, according to internal news from Google, but building a complete anti-spam system is a long process, and in China, the anti-spam site is enjoy high. In an interview with Baidu, Baidu is reluctant to disclose the names of anti-spam experts, "because this is one of Baidu's most valuable talent."

According to Wang, in fact, in search engines and spam sites in the long-term struggle, search engines are always on the defensive. This is not only because search engine companies really consider the relevance of search results and sort of only a few people, and the Internet all day to figure out how to deal with the search engine has hundreds of thousands of webmaster, more importantly, the manufacture of one or dozens of or even hundreds of cheat pages, as long as a landing page to make a change can be achieved, And can continue to carry out similar replication, and search engine screening, deletion, but it takes considerable time, this "to a hundred" to a website to deal with tens of thousands of web site work, for the search engine, is a huge investment in human resources and cost.

At present, the new attack direction of spam sites is the blog site. In the domestic major blog, now has been miserable, spam like locusts, traffic too general to cause the site channel blocked and inaccessible.

This struggle process, has been completely similar to the Internet virus and anti-virus, the difference is that the cost of manufacturing the virus is sometimes higher ——— need a high technical threshold, and the threshold of manufacturing spam site is very low, and easy to make.

Thus, as a search engine, the attitude towards spam sites is highly consistent: permanently deleted.

But in search, there will always be a spam site, because it is born every moment. Because of the huge difference between the cost and the revenue of the garbage website, the SEO spam will go forward and wave upon wave. So far, the government and the relevant departments have not made the "fake" on the internet to establish a corresponding legal system to restrict. But I believe this day will surely come.