This document defines requirements to support information exchanges among related entities of a common payment scheme. It defines:

a)      

EFC-related functional requirements for a common payment medium;

b)      

an application structure in a common payment medium;

c)       

EFC application data in a common payment medium.

The following is outside the scope of this document:

—    

requirements and data definitions for any other transport services such as public transport;

—    

a complete risk assessment for an EFC system using a common payment medium;

—    

security issues arising from an EFC application among all transport services;

—    

the technical trust relationship between a CSRP and a service user;

—    

concrete implementation specifications for implementation of security for an EFC system;

—    

detailed specifications required for privacy-friendly EFC implementations;

—    

any financial transactions of the CSRP.