SIST EN 13757-7:2025

Communication systems for meters - Part 7: Transport and security services

This document specifies transport and security services for communication systems for meters, sensors, and actuators, used to provide metering services.
This document specifies secure communication capabilities by design and supports the building of a secure system architecture.
This document is applicable to the protection of consumer data to ensure privacy.
This document is intended to be used with the lower layer specifications determined in the relevant parts of the EN 13757 series.

Kommunikationssysteme für Zähler - Teil 7: Transport- und Sicherheitsdienste

Dieses Dokument legt die Transport- und Sicherheitsdienste für Kommunikationssysteme für Zähler, Sensoren und Aktoren fest, die zur Bereitstellung von Messdienstleistungen verwendet werden.
Dieses Dokument legt sichere Kommunikationsfähigkeiten nach Design fest und unterstützt den Aufbau einer sicheren Systemarchitektur.
Dieses Dokument ist anwendbar für den Schutz der Verbraucherdaten zur Sicherung des Datenschutzes.
Dieses Dokument soll mit den in den relevanten Teilen der Normenreihe EN 13757 festgelegten Spezifikationen der unteren Schicht verwendet werden.

Systèmes de communication pour compteurs - Partie 7 : Services de transport et de sécurité

Le présent document spécifie les services de transport et de sécurité pour les systèmes de communication pour compteurs, capteurs et actionneurs, utilisés pour fournir des services de comptage.
Le présent document spécifie des fonctionnalités de communication sécurisées par conception et supporte la réalisation d’une architecture de systèmes sécurisés.
Le présent document s’applique à la protection des données relatives aux consommateurs afin d’assurer la confidentialité.
Le présent document est destiné à être utilisé avec les spécifications relatives aux couches inférieures déterminées dans les parties correspondantes de la série EN 13757.

Komunikacijski sistemi za merilnike - 7. del: Prevoz in varnostne službe

General Information

• Status: Published
• Public Enquiry End Date: 03-Oct-2023
• Publication Date: 08-Apr-2025
• ICS: 33.200 - Telecontrol. Telemetering
• ICS: 35.100.10 - Physical layer
• ICS: 35.100.20 - Data link layer
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 08-Apr-2025
• Due Date: 13-Jun-2025
• Completion Date: 09-Apr-2025
• Mandate: M/441 - Standardisation mandate to CEN, CENELEC and ETSI in the field of measuring instruments for the development of an open architecture for utility meters involving communication protocols enabling interoperability
• Ref Project: EN 13757-7:2025 - Communication systems for meters - Part 7: Transport and security services

Relations

• Revised: SIST EN 13757-7:2018 - Communication systems for meters - Part 7: Transport and security services
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2025
Komunikacijski sistemi za merilnike - 7. del: Prevoz in varnostne službe
Communication systems for meters - Part 7: Transport and security services
Kommunikationssysteme für Zähler - Teil 7: Transport- und Sicherheitsdienste
Systèmes de communication pour compteurs - Partie 7 : Services de transport et de
sécurité
Ta slovenski standard je istoveten z: EN 13757-7:2025
ICS:
33.200 Daljinsko krmiljenje, daljinske Telecontrol. Telemetering
meritve (telemetrija)
35.100.10 Fizični sloj Physical layer
35.100.20 Podatkovni povezovalni sloj Data link layer
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 13757-7
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2025
EUROPÄISCHE NORM
ICS 33.200; 35.100.10; 35.100.20; 91.140.50 Supersedes EN 13757-7:2018
English Version
Communication systems for meters - Part 7: Transport and
security services
Systèmes de communication pour compteurs - Partie 7 Kommunikationssysteme für Zähler - Teil 7:
: Services de transport et de sécurité Transport- und Sicherheitsdienste
This European Standard was approved by CEN on 24 February 2025.

CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13757-7:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Abbreviations and symbols . 11
4.1 Abbreviations . 11
4.2 Symbols . 13
5 Layer model . 13
5.1 M-Bus Layers . 13
5.2 The CI-field principle . 14
6 Authentication and Fragmentation Sublayer (AFL) . 18
6.1 Introduction . 18
6.2 Overview of the AFL-Structure . 19
6.3 Components of the AFL. 20
6.3.1 AFL Length Field (AFL.AFLL) . 20
6.3.2 AFL Fragmentation Control Field (AFL.FCL) . 20
6.3.3 AFL Message Control Field (AFL.MCL) . 20
6.3.4 AFL Key Information-Field (AFL.KI) . 21
6.3.5 AFL Message counter field (AFL.MCR) . 22
6.3.6 AFL MAC-field (AFL.MAC) . 22
6.3.7 AFL Message Length Field (AFL.ML) . 22
7 Transport Layer (TPL) . 23
7.1 Introduction . 23
7.2 Structure of none TPL header . 23
7.3 Structure of short TPL header . 23
7.4 Structure of long TPL header . 24
7.5 CI-field dependent elements . 24
7.5.1 Identification number . 24
7.5.2 Manufacturer identification . 25
7.5.3 Version identification . 25
7.5.4 Device type identification . 25
7.5.5 Access number . 27
7.5.6 Status byte in meter messages . 29
7.5.7 Status byte in partner messages . 30
7.5.8 Configuration field . 31
7.6 Configuration field dependent structure. 32
7.6.1 General . 32
7.6.2 Configuration field extension . 32
7.6.3 Optional TPL-header fields . 32
7.6.4 Optional TPL Trailer fields . 33
7.6.5 Partial encryption . 33
7.7 Security Mode specific TPL-fields. 33
7.7.1 Shared subfields of configuration field and configuration field extension . 33
7.7.2 Configuration field of Security Mode 0 . 36
7.7.3 Configuration field of Security Modes 2 and 3 . 37
7.7.4 Configuration field of Security Mode 5 . 38
7.7.5 Configuration field of Security Mode 7 . 39
7.7.6 Configuration field of Security Mode 8 . 41
7.7.7 Configuration field of Security Mode 9 . 43
7.7.8 Configuration field of Security Mode 10 . 45
8 Management of lower layers . 47
8.1 General . 47
8.2 Switching baud rate for M-Bus Link Layer according to EN 13757-2 . 47
8.3 Address structure if used together with the wireless Data Link Layer according to
EN 13757-4 . 47
8.4 Selection and secondary addressing . 47
8.5 Generalized selection procedure . 48
8.6 Searching for installed slaves . 49
8.6.1 Primary addresses . 49
8.6.2 Secondary addresses . 49
8.6.3 Wildcard searching procedure . 49
9 Security Services . 50
9.1 General . 50
9.2 Message counter. 51
9.2.1 Overview . 51
9.2.2 Message counter C transmitted by the meter . 52
M
9.2.3 Message counter C transmitted by the communication partner . 52
CP
9.2.4 Message counter C’ received by the meter . 52
CP
9.2.5 Message counter C’ and C” received by the communication partner . 53
M M
9.3 Authentication methods in the AFL . 53
9.3.1 Overview . 53
9.3.2 Authentication method AES-CMAC-128 . 54
9.3.3 Authentication method AES-GMAC-128 . 54
9.4 Encryption and authentication methods in the TPL . 55
9.4.1 Overview about TPL-security mechanisms . 55
9.4.2 Manufacturer specific security mechanism (Security Mode 1) . 56
9.4.3 Security mechanism DES-CBC (Security Mode 2 and 3) . 56
9.4.4 Security mechanism AES-CBC-128 (Security Mode 5) .
...