.... "The vehicle is saying 'I'm Alice, this is my location, this is my speed and my direction.' Everyone around you can listen to that," says Jonathan Petit, one of the authors of the study, which will be presented at the Black Hat Europe security conference next month and was first reported by IEEE Spectrum. "They can say, 'there's Alice, she claimed she was at home, but she drove by the drug store, went to a fertility clinic," this kind of thing…Someone can infer a lot of private information about the passenger."

The proposed connected car protocol, which the National Highway Traffic and Safety Administration (NHTSA) will consider mandating for the first time in American cars in 2017, uses the Wi-Fi-like 802.11p wireless signal and could allow cars to communicate with both each other and with highway infrastructure like roads or bridges....