FprEN 13757-7

SLOVENSKI STANDARD
01-september-2023
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: prEN 13757-7
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.

DRAFT
EUROPEAN STANDARD
prEN 13757-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2023
ICS Will supersede 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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 294.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13757-7:2023 E
worldwide for CEN national Members.

prEN 13757-7:2023 (E)
Contents Page
European foreword . 5
Introduction . 6
4.1 Abbreviations . 11
4.2 Symbols . 13
5.1 M-Bus Layers . 13
5.2 The CI-field principle . 14
6.1 Introduction . 19
6.2 Overview of the AFL-Structure . 20
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) . 21
6.3.4 AFL Key Information-Field (AFL.KI) . 22
6.3.5 AFL Message counter field (AFL.MCR) . 22
6.3.6 AFL MAC-field (AFL.MAC) . 23
6.3.7 AFL Message Length Field (AFL.ML) . 23
7.1 Introduction . 23
7.2 Structure of none TPL header . 24
7.3 Structure of short TPL header . 24
7.4 Structure of long TPL header . 24
7.5 CI-field dependent elements . 25
7.5.1 Identification number . 25
7.5.2 Manufacturer identification . 25
7.5.3 Version identification . 25
7.5.4 Device type identification . 25
7.5.5 Access number . 28
7.5.6 Status byte in meter messages . 30
7.5.7 Status byte in partner messages . 31
7.5.8 Configuration field . 32
7.6 Configuration field dependent structure. 33
7.6.1 General . 33
7.6.2 Configuration field extension . 34
7.6.3 Optional TPL-header fields . 34
7.6.4 Optional TPL Trailer fields . 34
7.6.5 Partial encryption . 34
7.7 Security mode specific TPL-fields . 34
7.7.1 Shared subfields of configuration field and configuration field extension . 34
7.7.2 Configuration field of Security mode 0 . 38
7.7.3 Configuration field of Security modes 2 and 3 . 39
7.7.4 Configuration field of Security mode 5 . 40
7.7.5 Configuration field of Security mode 7 . 41
7.7.6 Configuration field of Security mode 8 . 42
7.7.7 Configuration field of Security mode 9 . 45
7.7.8 Configuration field of Security mode 10 . 47
8.1 General . 49
8.2 Switching baud rate for M-Bus Link Layer according to EN 13757-2 . 49
8.3 Address structure if used together with the wireless Data Link Layer according to
EN 13757-4 . 49
prEN 13757-7:2023 (E)
8.4 Selection and secondary addressing . 49
8.5 Generalized selection procedure . 50
8.6 Searching for installed slaves . 51
8.6.1 Primary addresses . 51
8.6.2 Secondary addresses . 51
8.6.3 Wildcard searching procedure . 52
9.1 General . 53
9.2 Message counter. 54
9.2.1 Overview . 54
9.2.2 Message counter C transmitted by the meter . 54
M
9.2.3 Message counter C transmitted by the communication partner . 55
CP
9.2.4 Message counter C’ received by the meter . 55
CP
9.2.5 Message counter C’ and C” received by the communication partner . 55
M M
9.3 Authentication methods in the AFL . 56
9.3.1 Overview . 56
9.3.2 Authentication method AES-CMAC-128 . 56
9.3.3 Authentication method AES-GMAC-128 . 56
9.4 Encryption and Authentication methods in the TPL . 57
9.4.1 Overview about TPL-Security mechanisms. 57
9.4.2 Manufacturer specific Security mechanism (Security mode 1) . 59
9.4.3 Security mechanism DES-CBC (Security mode 2 and 3) . 59
9.4.4 Security mechanism AES-CBC-128 (Security mode 5) . 60
9.4.5 Security mechanism AES-CBC-128 (Security mode 7) . 61
9.4.6 Security mechanism AES-CTR-128 (Security mode 8) . 62
9.4.7 Security mechanism AES-GCM-128 (Security mode 9) . 63
9.4.8 Security mechanism AES-CCM-128 (Security mode 10) . 66
9.5 Reaction to security failure . 68
9.6 Key derivation. 69
9.6.1 General . 69
9.6.2 Key derivation function A .
...