EN IEC 62055-42:2022

Electricity metering - Payment systems - Part 42: Transaction Reference Numbers (TRN)

IEC 62055-42:2022, 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 IEC 62056‑6‑2. Reference is made to the international STS token standards (IEC 62055-41, IEC 62055-51 and IEC 62055-52) for payment metering systems, and interworking has been considered where appropriate in terms of token carrier ranges in the decimal domain. IEC 62055-41 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 part of any overall metering solution. Such interfaces for retrieving data from a meter may be defined using suitable protocols such as DLMS/COSEM as defined in the IEC 62056 series.

Messung der elektrischen Energie - Zählersysteme mit Inkassofunktion - Teil 42: Transaktionsreferenznummern (TRN)

Comptage de l’électricité - Systèmes de paiement - Partie 42: Numéros de référence des transactions (TRN)

IEC 62055-42:2022, spécifie un mécanisme de génération de jetons ainsi que la structure de jetons associée à la fonctionnalité de prépaiement intelligent, destinée aux marchés où les systèmes conformes à l’IEC 62055-41 ne sont pas utilisés et lorsque les exigences nationales ou spécifiques à un projet imposent l’utilisation d’un autre mécanisme de sécurité. Le présent document spécifie la structure des jetons, leur authentification, un mécanisme antirediffusion, le modèle d’exploitation des jetons et le protocole associé. Le présent document est informé par les services de gestion de clés de la STS Association ainsi que par les mécanismes de gestion de clés utilisés dans le modèle de sécurité DLMS/COSEM spécifié dans l’IEC 62056-6-2. Une référence est faite aux normes internationales relatives aux jetons STS (IEC 62055-41, IEC 62055-51 et IEC 62055-52) pour les systèmes de comptage à paiement, et l’interconnexion a été envisagée le cas échéant en ce qui concerne les plages des supports de jetons dans le domaine décimal. Les jetons conformes à l’IEC 62055-41 et ceux décrits dans le présent document ne sont pas interopérables, mais leurs domaines sont conçus pour être mutuellement exclusifs afin d’assurer que les deux types de jetons n’interfèrent pas l’un avec l’autre. Le traitement et la fonctionnalité des applications de comptage ainsi que les commandes et attributs des interfaces HAN et WAN ne relèvent pas du domaine d’application du présent document. Une référence est toutefois faite à d’autres normes traitant de ces aspects. Le mécanisme d’audit et de récupération des données du compteur relatives à la tarification, des relevés de compteurs, des données sur les profils et autres informations métrologiques légales ne relève pas du domaine d’application du présent document. Il est cependant défini dans le cadre de toute solution de comptage globale. Il est permis de définir de telles interfaces pour la récupération des données d’un compteur en utilisant des protocoles adaptés, tels que DLMS/COSEM défini dans la série IEC 62056.

Merjenje električne energije - Plačilni sistemi - 42. del: Referenčne vrednosti transakcij (TRN)

Ta dokument določa mehanizem za ustvarjanje žetonov in strukturo žetonov za funkcionalnost pametnega predplačila na trgih, kjer se ne uporabljajo sistemi, skladni s standardom IEC 62055-41, in kjer imajo zaradi projektnih ali nacionalnih zahtev drugačen varnostni mehanizem. Ta dokument določa strukturo žetona, potrjevanje pristnosti in mehanizem za preprečevanje ponovnega predvajanja, operacijski model žetona in protokol. Ta dokument temelji na storitvah upravljanja ključev Združenja STS in mehanizmih upravljanja ključev, ki se uporabljajo v varnostnem modelu DLMS/COSEM v okviru standarda IEC 62056 6 2. Dokument se sklicuje na mednarodne standarde za žetone STS (IEC 62055-41, IEC 62055-51 in IEC 62055-52) za sisteme merjenja plačil, medsebojno delovanje pa je bilo upoštevano, kjer je to primerno, v smislu razponov nosilcev žetonov v decimalni domeni. Žetoni iz standarda IEC 62055-41 in žetoni, opisani v tem dokumentu, niso interoperabilni. Njihove domene so zasnovane tako, da se medsebojno izključujejo, kar zagotavlja, da obe vrsti žetonov ne motita druga druge. Obdelava in funkcionalnost aplikacije za merjenje, ukazi in atributi vmesnika HAN, ukazi in atributi vmesnika WAN ne spadajo na področje uporabe tega dokumenta, vendar obstaja v zvezi s tem sklic na druge standarde. Mehanizem za revizijo in pridobivanje podatkov iz števca v zvezi s tarifiranjem, odčitki števcev, profilnimi podatki in drugimi pravnimi meroslovnimi informacijami, ne spada na področje uporabe tega dokumenta, vendar je našteto opredeljeno kot del vseh celovitih rešitev merjenja. Taki vmesniki za pridobivanje podatkov iz števca se lahko definirajo z uporabo ustreznih protokolov, npr. DLMS/COSEM, kot je opredeljeno v skupini standardov IEC 62056.

General Information

• Status: Published
• Publication Date: 01-Sep-2022
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 35.100.70 - Application layer
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: CLC/TC 13 - Equipment for electrical energy measurement and load control
• Drafting Committee: IEC/TC 13 - IEC_TC_13
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 02-Sep-2022
• Completion Date: 02-Sep-2022
• Ref Project: SIST EN IEC 62055-42:2022 - Electricity metering - Payment systems - Part 42: Transaction Reference Numbers (TRN)

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2022
Merjenje električne energije - Plačilni sistemi - 42. del: Referenčne vrednosti
transakcij (TRN)
Electricity metering - Payment systems - Part 42: Transaction Reference Numbers (TRN)
Ta slovenski standard je istoveten z: EN IEC 62055-42:2022
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62055-42

NORME EUROPÉENNE
EUROPÄISCHE NORM September 2022
ICS 17.220.20; 35.100.70; 91.140.50

English Version
Electricity metering - Payment systems - Part 42: Transaction
Reference Numbers (TRN)
(IEC 62055-42:2022)
Comptage de l'électricité - Systèmes de paiement - Partie Messung der elektrischen Energie - Zählersysteme mit
42: Numéros de référence des transactions (TRN) Inkassofunktion - Teil 42: Transaktionsreferenznummern
(IEC 62055-42:2022) (TRN)
(IEC 62055-42:2022)
This European Standard was approved by CENELEC on 2022-08-17. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62055-42:2022 E

European foreword
The text of document 13/1843/CDV, future edition 1 of IEC 62055-42, prepared by IEC/TC 13
"Electrical energy measurement and control" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 62055-42:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-05-17
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-08-17
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62055-42:2022 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 62056-4-7:2015 NOTE Harmonized as EN 62056-4-7:2016 (not modified)
IEC 62056-6-1 NOTE Harmonized as EN 62056-6-1
IEC 62056-6-2 NOTE Harmonized as EN IEC 62056-6-2
IEC 62056-21 NOTE Harmonized as EN 62056-21
IEC 62056-42 NOTE Harmonized as EN 62056-42
IEC 62056-46 NOTE Harmonized as EN 62056-46
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-300 2001 International Electrotechnical Vocabulary - - -
Electrical and electronic measurements
and measuring instruments - Part 311:
General terms relating to measurements -
Part 312: General terms relating to
electrical measurements - Part 313: Types
of electrical measuring instruments - Part
314: Specific terms according to the type of
instrument
+ AMD1 2015  - -
+ AMD2 2016  - -
+ AMD3 2017  - -
+ AMD4 2020  - -
IEC/TR 62051 1999 Electricity metering - Glossary of terms - -
IEC/TR 62055-21 2005 Electricity metering - Payment systems - - -
Part 21: Framework for standardization
IEC 62055-31 2005 Electricity metering - Payment systems - EN 62055-31 2005
Part 31: Particular requirements - Static
payment meters for active energy (classes
1 and 2)
IEC 62055-41 2018 Electricity metering - Payment systems - - -
Part 41: Standard transfer specification
(STS) - Application layer protocol for one-
way token carrier systems
IEC 62056-5-3 2017 Electricity metering data exchange - The EN 62056-5-3 2017
DLMS/COSEM suite - Part 5-3:
DLMS/COSEM application layer
IEEE EUI 64 - https://standards.ieee.org/develop/regauth/ - -
tut/eui64.pdf
- 1975 Verhoeff, J, Error Detecting Decimal - -
Codes, (Tract 29)
NIST SP 800-38D - Recommendation for Block Cipher Modes - -
of Operation: Galois/Counter Mode (GCM)
and GMAC
IEC 62055-42 ®
Edition 1.0 2022-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electricity metering – Payment systems –

Part 42: Transaction Reference Numbers (TRN)

Comptage de l’électricité – Systèmes de paiement –

Partie 42: Numéros de référence des transactions (TRN)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20, ICS 35.100.70, ICS 91.140.50 ISBN 978-2-8322-3951-3

– 2 – IEC 62055-42:2022 © IEC 2022
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms, definitions, abbreviated terms and notation . 11
3.1 Terms and definitions . 11
3.2 Abbreviated terms . 12
3.3 Notation . 13
4 Numbering conventions in this document . 13
5 Reference smart meter model . 13
5.1 Generic functional reference diagram . 13
5.2 Token transfer protocol reference model . 15
5.3 Dataflow from the POSApplicationProcess to the TokenCarrier . 16
5.4 Dataflow from the TokenCarrier to the MeterApplicationProcess . 16
5.5 MeterFunctionObjects / companion specifications . 17
6 POSToTokenCarrierInterface application layer protocol . 17
6.1 APDU: ApplicationProtocolDataUnit . 17
6.1.1 Data elements in the APDU . 17
6.1.2 SupplierID . 19
6.1.3 MeterID . 19
6.1.4 TokenOriginationID . 19
6.1.5 MessageIdentifier . 19
6.1.6 SequentialTokenNumber (STN) . 21
6.1.7 TruncatedSequentialTokenNumber (TSTN) . 21
6.1.8 Deducing the MS part of STN and validating TSTN . 21
6.1.9 FunctionIndex . 24
6.1.10 Relating the FunctionIndex and STN . 25
6.1.11 SingleTokenPayload . 27
6.1.12 SuperTokenPayload . 27
6.1.13 MessageAuthenticationCode (MAC) and TruncatedMAC (TMAC) . 27
6.1.14 AdditionalAuthenticationData (AAD). 30
6.1.15 SingleTokenPayload AAD preparation, TMAC derivation and APDU
preparation . 30
6.1.16 SuperTokenPayload AAD preparation, TMAC derivation and APDU
preparation . 31
6.1.17 Offset . 34
6.2 Tokens . 34
6.2.1 Token definition and format . 34
6.2.2 Class 4: RESERVED FOR FUTURE ASSIGNMENT . 35
6.2.3 Class 5 tokens . 35
6.2.4 Class 5: Unencrypted tokens . 39
6.2.5 Class 5: Encrypted tokens . 41
6.3 Token data elements. 47
6.4 TCDU Generation functions . 47
6.5 Security functions . 49
6.5.1 General requirements . 49
6.5.2 Key management . 49

IEC 62055-42:2022 © IEC 2022 – 3 –
6.5.3 Key deriviation . 50
6.5.4 Encryption process . 50
7 TokenCarriertoMeterInterface application layer protocol . 50
7.1 APDU: ApplicationProtocolDataUnit . 50
7.1.1 Data elements in the APDU . 50
7.1.2 TokenData . 50
7.1.3 AuthenticationResult . 50
7.1.4 ValidationResult . 51
7.1.5 TokenResult . 51
7.2 APDU Extraction processes . 52
7.2.1 APDU Extraction process for Class 5 tokens . 52
7.2.2 APDU Extraction process for SubClass 0 unencrypted token . 53
7.2.3 APDU Extraction process for SubClass 8 encrypted token . 53
7.3 Security functions .
...