MTV.Com: CULVER CITY, California — If you're reading this article on a computer, we know. If you've clicked to this site from an outside link, we know. And if you leave here and go somewhere else, somewhere you're not supposed to go, well, we don't know — but someone does.

"Is a Web site completely untraceable? No. It goes through mirrors, through proxy bounces, it goes international. To solve that it takes time, but it's just a simple factor," former FBI special agent Ernest Hilbert told MTV News. "The FBI has a whole division just to deal with this. There are 65,000 doors and windows on a computer that can be opened. You look inside of them, you own that box."

For eight years, Hilbert was one of 1,000 agents who focused on cyber investigations and computer forensics. Now a director of security for MySpace.com, Hilbert lent his years of expertise to director Gregory Hoblit's new film "Untraceable," which centers on an FBI agent (Diane Lane) who uses computer technology to track a serial killer through his Web site.

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