scope:

Overview

In autonomous toll systems a Toll Service Provider (TSP) sends toll declarations to the Toll Charger (TC), i.e. statements that a vehicle was circulating within a toll domain. Compliance Check Communication (CCC) according to CEN ISO/TS 12813:2009 provides useful indications to a TC of whether the OBE is operating correctly or not. It assumes the OBE to be secure and the TSP to be trusted. It mainly focusses on the compliance of the Service User (SU) with the toll domain's rules.

This Technical Specification does not assume the OBE to be secure nor the TSP to be trusted and adds measures to deal with the associated risks. It specifies the requirements for Secure Monitoring Compliance Checking (SM_CC), a concept that allows the TC to check the trustworthiness of toll declarations produced by a TSP using an OBE operated by the SU, while respecting the privacy of the SU in accordance with the applicable regulations. Trustworthiness equals the confidence in the reliable operation of the Toll Service Provider's EFC System and / or in case of errors gives technical indications about possible failures or manipulations which may be attributed to the SU and/or the TSP or an external party. An operational EFC System can use a combination of the CCC and SM_CC tools to keep misuse under control effectively.

This Technical Specification is the first part in a set of two that together specify Secure Monitoring for Autonomous Toll Systems: This technical specification, "Secure Monitoring - Compliance Checking", specifies the transactions between RSE of the TC over DSRC as well as transactions between the Toll Charger's and the Toll Service Provider's back end systems, for the purpose of Secure Monitoring. A second part, "Secure Monitoring - Trusted Recorder", specifies requirements on a tamper-proof entity called a Trusted Recorder (TR) which can be part of the OBE. It also specifies the interface between OBE and TR. Most - but not all - available options for secure monitoring require the use of a TR to provide for integrity, authenticity and non-repudiation services.

The SM_CC method is suitable:

a) for use by Toll Chargers and Toll Service Providers that do not have to trust each other and only trust parts of each other's equipment;

b) for all types of toll regimes according to CEN ISO/TS 17575 (all parts);

c) for providing evidence that can be used in court;

d) for the application to local schemes as well as in interoperable sectors such as the European Electronic Toll Service (EETS).