Some background, in case you haven’t been following tech news lately: it was recently discovered that certain recent compact discs from Sony BMG contained a rootkit that secretly installed hidden files when you tried to play it on your PC. Among other things, the rootkit installer creates serious security vulnerabilities that can threaten computer networks. It also “phones home” to Sony, a fact which allowed Dan Kaminsky, after querying DNS caches and running the IP addresses through a geocoder, to map the spread of the rootkit across the world. Via Boing Boing.