If you’ve ever played the game “Six Degrees of Kevin Bacon,” you know there’s a lot of truth to it. It’s based on the notion that any actor can be linked through his or her film roles to Mr. Bacon. And if you’ve ever spent some significant time on social networking sites, it’s pretty easy to see how this game can be applied to you or your friend’s real connections. So, it should come as no surprise that the same dynamic may work amongst victims of computer viruses. I came up with the nutty idea for this experiment after stumbling upon a trove of data stolen by a single keystroke logger, which appeared to be in operation between June and September of 2007, according to the time- and date-stamped records. During that time, the criminal(s) responsible for distributing that keylogger ensnared some 10,000 victims, stealing more than 20 gigabytes worth