IEC 62055-41:2014

Electricity metering - Payment systems - Part 41: Standard transfer specification (STS) - Application layer protocol for one-way token carrier systems

IEC 62055-41:2014 is available as IEC 62055-41:2014 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62055-41:2014 specifies the application layer protocol of the STS for transferring units of credit and other management information from a point of sale (POS) system to an STS-compliant payment meter in a one-way token carrier system. It is primarily intended for application with electricity payment meters without a tariff employing energy-based tokens, but may also have application with currency-based token systems and for services other than electricity. It is intended for use by manufacturers of payment meters that have to accept tokens that comply with the STS and also by manufacturers of POS systems that have to produce STS-compliant tokens and is to be read in conjunction with IEC 62055-5x series. This second edition cancels and replaces the first edition issued in 2007. It constitutes a technical revision. The main technical changes are:
- Class 2 token is extended to include credit transfer for gas and water with associated extensions in the display/test tokens.
- MfrCode is extended from 2 to 4 digits.
- Three token identifier base dates are defined to provide for more frequent key changes with TID roll-over procedures.
- A code of practice for the management of TID roll-over key changes in association with the revised set of base dates.
- Some clarifications and additional examples have been added.

Comptage de l'électricité - Systèmes de paiement - Partie 41: Spécification de transfert normalisé (STS) - Protocole de couche application pour les systèmes de supports de jeton unidirectionnel

IEC 62055-41:2014 est disponible sous forme de IEC 62055-41:2014 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
IEC 62055-41:2014 spécifie le protocole de couche application de la STS pour transférer des unités de crédit et autres informations de gestion, et ce, d'un système de point de vente (POS) vers un compteur à paiement conforme à la STS dans un système de support de jeton unidirectionnel. À l'origine, elle est destinée à être appliquée avec les compteurs à paiement d'électricité simple tarif utilisant des jetons basés sur l'énergie. Mais elle peut également être appliquée aux systèmes de jeton basés sur la monnaie et pour les services autres que l'électricité. Elle est destinée à être utilisée par les constructeurs de compteurs à paiement tenus d'accepter les jetons conformes à la STS et aussi par les constructeurs de systèmes POS tenus de produire des jetons conformes à la STS. Elle est à lire conjointement avec la série IEC 62055-5x. Cette deuxième édition annule et remplace la première édition, parue en 2007. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques suivantes:
- Le jeton de Classe 2 est étendu de façon à inclure le transfert de crédit pour le gaz et l'eau et les extensions associées dans les jetons display/test.
- MfrCode est étendu de 2 à 4 chiffres.
- Trois dates de référence d'identificateur de jeton sont définies pour des changements de clé plus fréquents avec des procédures de passage par zéro de l'identificateur de jeton (TID).
- Un code de bonnes pratiques pour la gestion des changements de clé par passage par zéro de l'identificateur de jeton (TID) en association avec l'ensemble révisé de dates de référence.
- Des clarifications et des exemples supplémentaires ont été introduits.

General Information

• Status: Published
• Publication Date: 13-May-2014
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 19.080 - Electrical and electronic testing
• ICS: 35.100.70 - Application layer
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: TC 13 - Electrical energy measurement and control
• Drafting Committee: WG 15 - TC 13/WG 15
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 28-Mar-2018

Relations

• Revised: IEC 62055-41:2018 - Electricity metering - Payment systems - Part 41: Standard transfer specification (STS) - Application layer protocol for one-way token carrier systems
• Effective Date: 05-Sep-2023
• Revises: IEC 62055-41:2007 - Electricity metering - Payment systems - Part 41: Standard transfer specification (STS) - Application layer protocol for one-way token carrier systems
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62055-41 ®
Edition 2.0 2014-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electricity metering – Payment systems –
Part 41: Standard transfer specification (STS) – Application layer protocol for
one-way token carrier systems
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

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IEC 62055-41 ®
Edition 2.0 2014-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electricity metering – Payment systems –

Part 41: Standard transfer specification (STS) – Application layer protocol for

one-way token carrier systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20; 35.100.70; 91.140.50 ISBN 978-2-8322-1614-9

– 2 – IEC 62055-41:2014 RLV © IEC 2014

CONTENTS
FOREWORD . 8

INTRODUCTION . 2

1 Scope . 13

2 Normative references . 13

3 Terms, definitions and abbreviations . 14

3.1 Terms and definitions. 14

3.2 Abbreviations . 15
3.3 Notation and terminology . 18
4 Numbering conventions . 18
5 Reference model for the standard transfer specification . 19
5.1 Generic payment meter functional reference diagram . 19
5.2 STS protocol reference model . 20
5.3 Dataflow from the POSApplicationProcess to the TokenCarrier . 21
5.4 Dataflow from the TokenCarrier to the MeterApplicationProcess . 22
5.5 MeterFunctionObjects / companion specifications . 23
5.6 ISO transaction reference numbers . 23
6 POSToTokenCarrierInterface application layer protocol . 23
6.1 APDU: ApplicationProtocolDataUnit . 23
6.1.1 Data elements in the APDU . 23
6.1.2 MeterPAN: MeterPrimaryAccountNumber . 25
6.1.3 TCT: TokenCarrierType . 26
6.1.4 DKGA: DecoderKeyGenerationAlgorithm . 27
6.1.5 EA: EncryptionAlgorithm . 27
6.1.6 SGC: SupplyGroupCode . 28
6.1.7 TI: TariffIndex . 28
6.1.8 KRN: KeyRevisionNumber . 29
6.1.9 KT: KeyType . 29
6.1.10 KEN: KeyExpiryNumber . 29
6.1.11 DOE: DateOfExpiry . 29
6.2 Tokens . 30
6.2.1 Token definition format . 30
6.2.2 Class 0: TransferCredit . 30
6.2.3 Class 1: InitiateMeterTest/Display . 31
6.2.4 Class 2: SetMaximumPowerLimit . 31
6.2.5 Class 2: ClearCredit . 31
6.2.6 Class 2: SetTariffRate . 31
6.2.7 Class 2: Set1stSectionDecoderKey . 32
6.2.8 Class 2: Set2ndSectionDecoderKey . 32
6.2.9 Class 2: ClearTamperCondition . 32
6.2.10 Class 2: SetMaximumPhasePowerUnbalanceLimit . 32
6.2.11 Class 2: SetWaterMeterFactor . 32
6.2.12 Class 2: Reserved for STS use . 33
6.2.13 Class 2: Reserved for Proprietary use . 33
6.2.14 Class 3: Reserved for STS use . 33

6.3 Token data elements . 33

6.3.1 Data elements used in tokens . 33

6.3.2 Class: TokenClass . 34

6.3.3 SubClass: TokenSubClass. 34

6.3.4 RND: RandomNumber . 35

6.3.5 TID: TokenIdentifier . 36

6.3.6 Amount: TransferAmount . 37

6.3.7 CRC: CyclicRedundancyCode . 39

6.3.8 Control: InitiateMeterTest/DisplayControlField . 39

6.3.9 MPL: MaximumPowerLimit . 40

6.3.10 MPPUL: MaximumPhasePowerUnbalanceLimit . 40
6.3.11 Rate: TariffRate . 40
6.3.12 WMFactor: WaterMeterFactor . 40
6.3.13 Register: RegisterToClear . 40
6.3.14 NKHO: NewKeyHighOrder . 40
6.3.15 NKLO: NewKeyLowOrder. 40
6.3.16 KENHO: KeyExpiryNumberHighOrder . 40
6.3.17 KENLO: KeyExpiryNumberLowOrder . 41
6.3.18 RO: RolloverKeyChange . 41
6.4 TCDUGeneration functions . 41
6.4.1 Definition of the TCDU . 41
6.4.2 Transposition of the Class bits . 41
6.4.3 TCDUGeneration function for Class 0,1 and 2 tokens . 42
6.4.4 TCDUGeneration function for Set1stSectionDecoderKey token . 42
6.4.5 TCDUGeneration function for Set2ndSectionDecoderKey token . 45
6.5 Security functions . 46
6.5.1 General requirements . 46
6.5.2 Key attributes and key changes . 46
6.5.3 DecoderKey generation . 54
6.5.4 STA: EncryptionAlgorithm07 . 59
6.5.5 DEA: EncryptionAlgorithm09 . 63
7 TokenCarriertoMeterInterface application layer protocol . 63
7.1 APDU: ApplicationProtocolDataUnit . 63
7.1.1 Data elements in the APDU . 63
7.1.2 Token . 64

7.1.3 AuthenticationResult . 64
7.1.4 ValidationResult . 64
7.1.5 TokenResult . 65
7.2 APDUExtraction functions . 66
7.2.1 Extraction process . 66
7.2.2 Extraction of the 2 Class bits . 66
7.2.3 APDUExtraction function for Class 0 and Class 2 tokens . 67
7.2.4 APDUExtraction function for Class 1 tokens . 68
7.2.5 APDUExtraction function for Set1stSectionDecoderKey and
Set2ndSectionDecoderKey tokens . 68

– 4 – IEC 62055-41:2014 RLV © IEC 2014

7.3 Security functions . 69

7.3.1 Key attributes and key changes . 69

7.3.2 DKR: DecoderKeyRegister. 69

7.3.3 STA: DecryptionAlgorithm07 . 70

7.3.4 DEA: DecryptionAlgorithm09 . 72

7.3.5 TokenAuthentication . 73

7.3.6 TokenValidation .
...

IEC 62055-41 ®
Edition 2.0 2014-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering – Payment systems –
Part 41: Standard transfer specification (STS) – Application layer protocol for
one-way token carrier systems
Comptage de l'électricité – Systèmes de paiement –
Partie 41: Spécification de transfert normalisé (STS) – Protocole de couche
application pour les systèmes de supports de jeton unidirectionnel

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

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IEC 62055-41 ®
Edition 2.0 2014-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering – Payment systems –

Part 41: Standard transfer specification (STS) – Application layer protocol for

one-way token carrier systems
Comptage de l'électricité – Systèmes de paiement –

Partie 41: Spécification de transfert normalisé (STS) – Protocole de couche

application pour les systèmes de supports de jeton unidirectionnel

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XE
ICS 17.220.20; 35.100.70; 91.140.50 ISBN 978-2-8322-1487-9

– 2 – IEC 62055-41:2014 © IEC 2014

CONTENTS
FOREWORD . 8

INTRODUCTION . 10

1 Scope . 13

2 Normative references . 13

3 Terms, definitions and abbreviations . 14

3.1 Terms and definitions. 14
3.2 Abbreviations . 15
3.3 Notation and terminology . 17
4 Numbering conventions . 18
5 Reference model for the standard transfer specification . 19
5.1 Generic payment meter functional reference diagram . 19
5.2 STS protocol reference model . 20
5.3 Dataflow from the POSApplicationProcess to the TokenCarrier . 21
5.4 Dataflow from the TokenCarrier to the MeterApplicationProcess . 22
5.5 MeterFunctionObjects / companion specifications . 23
5.6 ISO transaction reference numbers . 23
6 POSToTokenCarrierInterface application layer protocol . 24
6.1 APDU: ApplicationProtocolDataUnit . 24
6.1.1 Data elements in the APDU . 24
6.1.2 MeterPAN: MeterPrimaryAccountNumber . 25
6.1.3 TCT: TokenCarrierType . 27
6.1.4 DKGA: DecoderKeyGenerationAlgorithm . 27
6.1.5 EA: EncryptionAlgorithm . 27
6.1.6 SGC: SupplyGroupCode . 28
6.1.7 TI: TariffIndex . 28
6.1.8 KRN: KeyRevisionNumber . 29
6.1.9 KT: KeyType . 29
6.1.10 KEN: KeyExpiryNumber . 29
6.1.11 DOE: DateOfExpiry . 29
6.2 Tokens . 30
6.2.1 Token definition format . 30
6.2.2 Class 0: TransferCredit . 30
6.2.3 Class 1: InitiateMeterTest/Display . 31
6.2.4 Class 2: SetMaximumPowerLimit . 31
6.2.5 Class 2: ClearCredit . 31
6.2.6 Class 2: SetTariffRate . 31
6.2.7 Class 2: Set1stSectionDecoderKey . 32
6.2.8 Class 2: Set2ndSectionDecoderKey . 32
6.2.9 Class 2: ClearTamperCondition . 32
6.2.10 Class 2: SetMaximumPhasePowerUnbalanceLimit . 33
6.2.11 Class 2: SetWaterMeterFactor . 33
6.2.12 Class 2: Reserved for STS use . 33
6.2.13 Class 2: Reserved for Proprietary use . 33
6.2.14 Class 3: Reserved for STS use . 33

6.3 Token data elements . 34

6.3.1 Data elements used in tokens . 34

6.3.2 Class: TokenClass . 35

6.3.3 SubClass: TokenSubClass. 35

6.3.4 RND: RandomNumber . 36

6.3.5 TID: TokenIdentifier . 36

6.3.6 Amount: TransferAmount . 38

6.3.7 CRC: CyclicRedundancyCode . 39

6.3.8 Control: InitiateMeterTest/DisplayControlField . 40

6.3.9 MPL: MaximumPowerLimit . 41

6.3.10 MPPUL: MaximumPhasePowerUnbalanceLimit . 41
6.3.11 Rate: TariffRate . 41
6.3.12 WMFactor: WaterMeterFactor . 41
6.3.13 Register: RegisterToClear . 41
6.3.14 NKHO: NewKeyHighOrder . 41
6.3.15 NKLO: NewKeyLowOrder. 41
6.3.16 KENHO: KeyExpiryNumberHighOrder . 41
6.3.17 KENLO: KeyExpiryNumberLowOrder . 41
6.3.18 RO: RolloverKeyChange . 42
6.4 TCDUGeneration functions . 42
6.4.1 Definition of the TCDU . 42
6.4.2 Transposition of the Class bits . 42
6.4.3 TCDUGeneration function for Class 0,1 and 2 tokens .
...