When you’re on the Internet, there are good reasons to have that eerie sense of being followed. And don’t think you have anonymity just because your service provider gives you a dynamic IP address. At a minimum, visited websites can tell what service provider you’re with and what city or region you are in.

What’s more, any communication with a Web server gives it the opportunity to deposit a cookie on your computer. Benign cookies — small text files downloaded through your browser — simply record information needed to make your Web experience better. That can include sign-in information, where you visited on the site, interface customizations, and the like. Most cookies also keep an identifier for each visitor, so that the next time you connect to a site’s server, it can match you up with its records of previous visits. That way, you won’t have to start from scratch whenever you go to the site.(…..read the whole story)