These companies rely on the tracking technology can be divided into three categories: the most basic is the cookies (used to track user surfing habits of a small file stored by a web server on the client’s computer), more powerful Flash cookies, and the introduction of a certain software component of the “Lighthouse.”
Usually companies use cookies to track and build a specific computer to access the web browsing history; Flash cookies addition, you can reinstall the regular user to delete cookies, which means they can track when a user tries to open the line to avoid back door; and the latest technology “beacon” to the Internet through the records of more subtle behavior, such as text, and so the fight to get more user information.
As [x +1] company that brokers the available data analysis techniques are changing the face of the Internet. In addition to the name on the network people are not open, other private Yigai exposed.
The developer trace files Targus company revealed on Microsoft’s MSN.com site implanted a tracking document, by tracking Internet users, Microsoft can get the user’s age, zip code, gender, there are about personal income, marital status , with or without children, housing conditions and other information. EBay in a few seconds after the user logs on, the information on the details of their behavior may have boarded a Seattle startup BlueKai auction platform. Day, BlueKai have sold about 50 million copies like this, the personal information browsing habits, the cheapest price is 0.1 cents each, the auction can occur at any time.