Any web site in the world can track your movements through its pages and monitor your reading interests using your IP address, a unique ID assigned to each computer on the Internet. Depending on the policies of the Internet resource, you might not be able to get access to the information you need. Also, your visit can be registered and used later to gather some personal information about you.
It is widely agreed that governments and organizations publish dummy websites on controversial topics for the purpose of monitoring interested parties. Also, this information, in combination with your e-mail address, can be used to increase the number of targeted advertisements fired at you by the marketers.
Using only your IP address and the information about your operating system, a Web site can automatically exploit security holes in your system using some not-very-complex, ready-made, free hacking programs. Some of such programs may just hang your machine, making you reboot it, but other, more powerful ones, can get access to the content of your hard drive or RAM. The anonymous proxy prevents this by hiding your IP address so that no one can access your computer via the network. In most cases, however, proxies do inform the target server about the address of the computer that made the request, transmitting your IP-address in different forms.
Anonymous (real anonymous!) proxy servers don't transfer the information about the IP-address of the client, and thus effectively hide the information about you and your surfing interests. Besides that, some proxy servers can also hide the very fact that you are surfing through a proxy server! Anonymous proxies can be used for all kinds of Web-services.
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