Computer security expert witnesses may consult regarding network security, network forensics, computer crime, data security, and computer forensics. According to Reuters, computer software hackers Charlie Miller and Chris Valasek will release blueprints for techniques to attack critical systems in the Toyota Prius and Ford Escape at the Def Con hacking convention in Las Vegas, August 1-4, 2013. Miller and Valasek are labeled “white hats,” meaning ethical hackers who specialize in uncovering computer weaknesses before criminals may exploit them.