Providing secure inter-vehicle data communications

A security server, comprising:

• at least one hardware processor;
• and
• a computer-readable storage medium coupled to the at least one hardware processor and storing programming instructions for execution by the at least one hardware processor, wherein the programming instructions, when executed, cause the at least one hardware processor to perform operations comprising:
• receiving, at the security server and from a hardware security processor connected to a system bus of a vehicle, security confidence data of the vehicle, wherein the security confidence data include data traffic pattern information of the vehicle, and wherein data traffic pattern information comprises information of frequencies or sizes of data exchanged between components connected to the system bus, and the hardware security processor is installed on the vehicle and is implemented on a hardware security module (HSM) that stores digital keys for authentication and encryption;
• determining, at the security server, a security confidence score of the vehicle, wherein the determining the security confidence score comprises:
• determining a version factor based on version information of a software code executing on a component of the vehicle;
• determining a diagnostic data factor based on diagnostic data information of the vehicle;
• determining a data traffic factor based on the data traffic pattern information;
• and
• calculating the security confidence score based on the version factor, the diagnostic data factor, and the data traffic factor;
• receiving, at the security server, a query from a different vehicle;
• and
• in response to the query, transmitting the confidence score of the vehicle to the different vehicle.

A non-transitory computer-readable medium storing instructions which, when executed, cause a computing device to perform operations comprising:

• receiving, at a security server and from a hardware security processor connected to a system bus of a vehicle, security confidence data of the vehicle, wherein the security confidence data include data traffic pattern information of the vehicle, and wherein data traffic pattern information comprises information of frequencies or sizes of data exchanged between components connected to the system bus, and the hardware security processor is installed on the vehicle and is implemented on a hardware security module (HSM) that stores digital keys for authentication and encryption;
• determining, at the security server, a security confidence score of the vehicle, wherein the determining the security confidence score comprises:
• determining a version factor based on version information of a software code executing on a component of the vehicle;
• determining a diagnostic data factor based on diagnostic data information of the vehicle;
• determining a data traffic factor based on the data traffic pattern information;
• and
• calculating the security confidence score based on the version factor, the diagnostic data factor, and the data traffic factor;
• receiving, at the security server, a query from a different vehicle;
• and
• in response to the query, transmitting the confidence score of the vehicle to the different vehicle.