Today, cars are more electronized than ever before. The "This Car Runs on Code" report published in the IEEE Spectrum journal indicated: As of 2009, a typical car already contains 100+ processors, 50+ electronic control units, 5000+ meters of cabling and 100 millions of lines of code. That means, along with the more and more close integration between computer systems and vehicles, the security audit is also becoming increasingly important and complicated.