ISO/TS 21193:2024

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.