Where is my privacy?

by Carol~ Moderator - 3/2/12 9:45 AM

In Reply to: NEWS - March 02, 2012 by Carol~ Moderator

From the Kaspersky Lab Weblog:

When we upload something embarrassing about ourselves to, let's say Facebook, that's completely our fault. But there are other subtle ways to get information about us. Let's say a few words about tracking.

Every time you visit a website you request HTML that will be rendered in your local browser. This code may include external references, so you will request them as well. Nothing to be afraid of so far. [Screenshot]

But what happens when these external requests are used to track you? Is that possible? Let's suppose you are enjoying your favorite social network, let's say Facebook again. Even after you logout, your browser stores some cookies that identify you in Facebook. Then you visit some random website (www.randomwebsite.com) that includes any "I like" buttons, which in fact are external references to Facebook. And as Facebook has access to its own cookies, it gets a request with HTTP-Referer www.randomwebsite.com and with the cookie that identifies you. Result: Facebook knows all the sites you browse as far as they have a reference to Facebook.

We may think this is easily solvable by just getting rid of all cookies. Bad news, there are many other techniques that may be used to identify users by their browser's fingerprint. There is a very interesting study showing that combining your browser, plugins installed and basic information about your computer, 83% of users have a unique fingerprint. And this is without even being aggressive! You can imagine how many times external references include Javascript code that gets a lot of information from your computer to identify you.

Continued : http://www.securelist.com/en/blog/208193399/Where_is_my_privacy