What is the best and most secure free anonymous proxy server?

Free proxy servers are secure? How do you know they are not spyware or download viruses to your computer when you download them? Can anyone recommend a good one? I tried using something called Charon, but did not work.

A truly anonymous proxy server is not downloaded. If you run a proxy server on your computer, your IP address is still available to Web servers connects. A proxy is installed can block cookies, advertisements, and the mask of the type of browser you use, but that's all. As true powers anonymous running on a remote computer, and all data passes through the remote computer, unless you are using end-to-end encryption such as SSL, anonymous proxy has access to the data you send through it. Privax network of free web proxies: free proxy list http://www.privax.us/: There are http://proxy.org/ Proxy servers are reputable, but really can trust the reputation: http://proxify.com/

The Lockerz Generator (With Proxy) (Free download in the Description!)