Secure remote diagnostics of a vehicle using UGP

Diagnostics of a vehicle has been predominantly done at the garage (service center). Thus, it was always considered to be over a "trusted" access. In the recent past the trend is to move towards making this diagnostic available to a remote location i.e. over an untrusted network for various features such as predictive diagnostics, ADAS (advanced driver assistance systems), automated driving etc. Currently there are proprietary solutions (specific to OEMs) available for remote diagnostics and secure vehicle access. In 2015, ISO has come with a specification (ISO 13185-2) of a framework called UGP (Unified Gateway Protocol) which defines standardized access to vehicle via a nomadic device. This work attempts to define and validate a secure standardized system architecture for remote diagnostics as per ISO-13185-2, using a nomadic device (tester), In-vehicle gateway and automotive electronic control unit (ECU to be diagnosed).