Connected devices are forecast to grow to 8.4 billion this year, with expected spending of over $2 trillion. Security researchers are concerned because the automotive industry is mixing up software from different suppliers, software that might not end up matching well due to varying shelf lives and patch cycles. The US Department of Transportation is one contributor to the poor state of the industry after issuing vague guidelines only requiring that the vehicles should be engineered with safeguards to prevent online attacks”]
Source: https://www.bitdefender.com/blog/hotforsecurity/hard-protect-driverless-cars-hackers/