Out-of-band authentication for vehicular communications using joint automotive radar communications

A computer program product installed in an onboard unit of a connected vehicle, the computer program product including codes and routines that are operable, when executed by the onboard unit, to cause the onboard unit to execute routines including:

• receiving, by a directional radio of a connected vehicle, a directional communication having a payload that includes a first temporary identifier and sensor data for a purported transmitter of the directional communication;
• initiating, by the directional radio and a radar of the connected vehicle, a set of Joint Automotive Radar and Communications (JARCs) with the purported transmitter to determine an authenticity status of the first temporary identifier;
• and
• executing a vehicular action for the payload of the directional communication responsive to the authenticity status.

A system of a connected vehicle comprising:

• a processor communicatively coupled to a non-transitory memory, a directional radio, and a radar of the connected vehicle, wherein the processor is operable to retrieve computer-executable code from the non-transitory memory which is operable, when executed by the processor, to cause the processor to:
• receive, by the directional radio, a directional communication having a payload that includes a first temporary identifier and sensor data for a purported transmitter of the directional communication;
• initiate, by the directional radio and the radar, a set of Joint Automotive Radar and Communications (JARCs) with the purported transmitter to determine an authenticity status of the first temporary identifier;
• and
• execute a vehicular action for the payload of the directional communication responsive to the authenticity status.