A system and method of delivering vehicle data. Reference data is received by a data processing system. The reference data comprises a reference identifying the vehicle data stored in a repository that is located off of a vehicle and reference authentication data identifying a source of the reference data. The data processing system uses the reference authentication data to determine whether the reference data is from an approved source for the reference data. The reference is used to retrieve the vehicle data from the repository by the data processing system when the reference data is determined to be from the approved source for the reference data. The vehicle data comprises authentication data identifying a source of the vehicle data. The data processing system uses the authentication data to determine whether the vehicle data is from an approved source for the vehicle data.