BS EN IEC 62055-42:2022

1   Scope This document specifies a token generation mechanism and token structure for smart prepayment functionality in markets where IEC 62055‑41 compliant systems are not used, and where a different security mechanism is required by project-specific or national requirements. This document specifies token structure, authentication and an anti-replay mechanism, token operating model, and protocol. This document is informed by the STS Association key management services, and by the key management mechanisms used within the DLMS / COSEM security model within . Reference is made to the international STS token standards (, and ) for payment metering systems, and interworking has been considered where appropriate in terms of token carrier ranges in the decimal domain. tokens and those described in this document are not interoperable, however their domains are designed to be mutually exclusive to ensure the two kinds of tokens do not interfere with each other. Metering application processing and functionality, HAN interface commands and attributes, WAN interface commands and attributes are outside the scope of this document; however, reference is made to other standards in this regard. The mechanism for auditing and retrieving data from the meter relating to tariffication, meter readings, profile data and other legal metrology information is outside the scope of this document; however, this is defined as ...