Cloaking

The technique of the Cloaking (in French dissimulation ) is a technique used by the Black hat to optimize their positioning. It consists for the Web server thus programmed to present contents of different Web page according to whether the distant customer is a robot of search engine or human.

Operation

This distinction is carried out by the Web server thanks to a recognition of address IP (for example identification of an search engine by its IP), or heading HTTP Use-Agent sent by the customer who makes a request on the page. When a customer is identified as being a robot of search engine, a script located on the Web server delivers a version different from the Web page, a version which contains elements not present on the Web page “normal” (readable by human).

The only use legitimates that it can be made of this technique is to propose only to the customers who can interpret it specific contents (for example, contents Adobe Flash are not readable by a robot). Today, of better methods of accessibility are at disposal, making the cloaking useless.

Uses

The cloaking is often used as technique of Spamdexing (in French abusive referencing ), in order to deceive the search engines and to thus make assemble the row of the site or the page in the classifications of the search engines, technique known as of Upranking. It can also be used for berner the users of search engine by leading them to visit a page or a site thanks to the description provided by the known as search engine, whereas the finally visible page by the user has appreciably different contents and/or without report/ratio, even pornographic contents. For this reason, the principal search engines consider that this technique is a violation of their directives, and they under-note or remove the accused sites when that a cloaking is detected as being fraudulent.

See too

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