Better encryption such as for C8 ECU was indeed inevitable to protect intellectual property. Auto industry has been very slow to deploy strong encryption for ECUs and other software. If you think all encryption is hackable, try hacking digital-cable's 20-year-old encryption techniques to get free HBO and see how far you get.
Boasting/threatening/taunting about committing federal cybercrimes seems non-boring but unwise. This could be a good time for our hackers to re-review the Bill Shatner SNL skit where he addresses trekkies.
fb1, what is the new vehicle you are planning to buy next? Removing the onstar transponder board before leaving dealership lot is awesome and legendary. Please videotape/share if convenient - it may go viral. Also please include that first-call to onstar with the salesperson when the onstar person tries to get you to sign up. I would pity the onstar rep who takes that call, but they have already heard everything and are inevitably super-nice and jovial about everything.
btw, when i drove CTS-Vs at Monticello track in NY, at least one driver got the undesirable badly-timed call from onstar asking if he had been in an accident. I recall the track staff saying those calls were not uncommon. That one day the call was reportedly triggered by a deceleration sensor exceeding alarm threshold while we excercised the CTS-V's astonishing braking capabilities. Zero airbags deployed.