Mikko Hypponen, chief research officer of F-Secure, distinguishes among cyberwar and everything else, explains why the anti-virus industry failed when it came to detecting and preventing Stuxnet, discusses why critical infrastructure is at major risk to attack and reveals how he tracked down the authors of the first PC virus, which turns 25 years old this year. SC Magazine Executive Editor Dan Kaplan spoke with Hypponen following a media luncheon at the RSA Conference in San Francisco.