Ephemeral key exchange between vehicle software nodes

A system for establishing secure communications between a first node and a second node within a vehicle, the system comprising:

• processing circuitry coupled to the first node of the vehicle and to the second node of the vehicle, the processing circuitry configured to:
• receive, from the first node of the vehicle, a first message comprising information identifying the second node of the vehicle,
• in response to receiving the first message, generate an encryption key,
• communicate to the first node of the vehicle information identifying the encryption key,
• receive, from the second node of the vehicle, a second message comprising information identifying the first node of the vehicle,
• determine the second message is valid based on the first message, and
• communicate to the second node of the vehicle information identifying the encryption key.

A non-transitory computer-readable medium having non-transitory computer-readable instructions encoded thereon that, when executed by a processor, causes the processor to:

• receive, from the first node of the vehicle, a first message comprising information identifying the second node of the vehicle,
• in response to receiving the first message, generate, using the vehicle’s processing circuitry, an encryption key,
• communicate to the first node of the vehicle information identifying the encryption key,
• receive, from the second node of the vehicle, a second message comprising information identifying the first node of the vehicle,
• determine, using the processing circuitry, the second message is valid based on the first message, and
• communicate to the second node of the vehicle information identifying the encryption key.