The Car Hacker’s Handbook: A Guide for the Penetration Tester, Craig Smith, No Starch Press
What causes worse damage, hacking into a desktop PC or a car? Often, the latter, and it has recently become a concern. You might have seen the video of a SUV in a ditch, directed there by a white-hat. Security professionals will want to know all about this topic, and can get an excellent start by reading the (free) current version. Shortly thereafter, you will want to buy the new, updated version from No Starch Press.
Those of us who chant the green “Reduce, Reuse, Recycle” mantra will have better reasons for keeping our 10-year-old cars!
See also IAmTheCavalry which is
a global grassroots organization that is focused on issues where computer security intersects public safety and human life. We strive to ensure that these technologies are worthy of the trust we place in them. [..] Our areas of focus are medical devices, automobiles, home electronics and public infrastructure.
The links below might not be much use.