Systems and methods for secure communications in vehicle telematics systems

1. A vehicle telematics device, comprising:

a processor;

a memory coupled to the processor and storing a vehicle telematics application;

a security chip coupled to the processor and the memory, wherein the security chip has stored therein a private cryptographic key and an authentication certificate for the vehicle telematics device signed by a certificate authority and including a public cryptographic key corresponding to the private cryptographic key, wherein the security chip is configured to support a Transport Layer Security (TLS) stack; and

a connector configured to (i) mate with a vehicle diagnostic connector of a vehicle, (ii) receive sensor data related to a characteristic of the vehicle over a vehicle data bus of the vehicle, and (iii) receive primary power for the vehicle telematics device from a vehicle power system of the vehicle,

wherein the security chip is further configured to encrypt the sensor data using the private cryptographic key, establish a Transmission Control Protocol (TCP)/Transport Layer Security (TLS) security session with a customer server using the authentication certificate, and transmit the encrypted sensor data to the customer server using the TCP/TLS security session, and

wherein the memory is sufficient to handle operations of the Transport Layer Security (TLS) stack, the memory including at least 30 kilobytes of random access memory (RAM) and 100 kilobytes of flash memory.

2. The vehicle telematics device of claim 1 , wherein:

the security chip is configured to generate the private and public cryptographic keys and store the private key in the secure storage.

3. The vehicle telematics device of claim 1 , wherein the connector is configured to receive the sensor data from one or more sensor devices of the vehicle via the vehicle data bus.

4. The vehicle telematics device of claim 1 , wherein:

the vehicle telematics device is further configured to communicate with a mobile communications device; and

the security chip is further configured to apply Short Message Service (SMS) authentication via challenge-response authentication with the mobile communications device.

5. The vehicle telematics device of claim 1 , wherein:

the vehicle telematics device is further configured to communicate with a maintenance server; and

the security chip is further configured to transmit encrypted data to the maintenance server via a Transmission Control Protocol (TCP)/Transport Layer Security (TLS) security session.

6. The vehicle telematics device of claim 1 , wherein:

the vehicle telematics device is further configured to communicate with the certificate authority; and

the security chip is configured to receive the authentication certificate signed by the certificate authority from the certificate authority.

7. A vehicle telematics system, comprising:

a vehicle having a vehicle diagnostic connector connected to a vehicle data bus and a plurality of vehicle sensors coupled to the vehicle data bus, wherein each vehicle sensor is configured to produce sensor data related to a characteristic of the vehicle and provide the sensor data to the vehicle data bus;

a vehicle telematics device including:

(i) a processor,

(ii) a memory coupled to the processor and storing a vehicle telematics application,

(iii) a security chip coupled to the processor and the memory, wherein the security chip has stored therein a private cryptographic key and an authentication certificate for the vehicle telematics device signed by a certificate authority and including a public cryptographic key corresponding to the private cryptographic key, wherein the security chip is configured to support a Transport Layer Security (TLS) stack, and

(iv) a connector configured to mate with the vehicle diagnostic connector of the vehicle, receive the sensor data from the plurality of vehicle sensors over the vehicle data bus and receive primary power for the vehicle telematics device from a vehicle power system of the vehicle,

wherein the security chip is further configured to encrypt the sensor data using the private cryptographic key, establish a Transmission Control Protocol (TCP)/Transport Layer Security (TLS) security session with a customer server using the authentication certificate, and transmit the encrypted sensor data to the customer server using the TCP/TLS security session; and

wherein the memory is sufficient to handle operations of the Transport Layer Security (TLS) stack, the memory including at least 30 kilobytes of random access memory (RAM) and 100 kilobytes of flash memory.

8. The vehicle telematics system of claim 7 , wherein:

the security chip is configured to generate the private and public cryptographic keys and store the private key in the secure storage.

9. The vehicle telematics system of claim 7 , wherein:

the vehicle telematics device further includes one or more sensor devices capable of measuring sensor data regarding the vehicle and configured to store the sensor data in the memory.

10. The vehicle telematics system of claim 7 , further comprising:

a mobile communications device in communication with the vehicle telematics device, wherein the security chip is further configured to apply Short Message Service (SMS) authentication via challenge-response authentication with the mobile communications device.

11. The vehicle telematics system of claim 7 , further comprising:

a maintenance server in communication with the vehicle telematics device, wherein the security chip is further configured to transmit encrypted data to the maintenance server via a Transmission Control Protocol (TCP)/Transport Layer Security (TLS) security session.

12. The vehicle telematics system of claim 7 , further comprising:

a certificate authority in communication with the vehicle telematics device, wherein the security chip is configured to receive the authentication certificate signed by the certificate authority from the certificate authority.