EN 62351-9:2017

Power systems management and associated information exchange - Data and communications security - Part 9: Cyber security key management for power system equipment

IEC 62351-9:2017(E) specifies cryptographic key management, namely how to generate, distribute, revoke, and handle public-key certificates and cryptographic keys to protect digital data and its communication. Included in the scope is the handling of asymmetric keys (e.g. private keys and public-key certificates), as well as symmetric keys for groups (GDOI). This document assumes that other standards have already chosen the type of keys and cryptography that will be utilized, since the cryptography algorithms and key materials chosen will be typically mandated by an organization’s own local security policies and by the need to be compliant with other international standards. This document therefore specifies only the management techniques for these selected key and cryptography infrastructures. The objective is to define requirements and technologies to achieve interoperability of key management. The purpose of this document is to guarantee interoperability among different vendors by specifying or limiting key management options to be used. This document assumes that the reader understands cryptography and PKI principles.

Energiemanagementsysteme und zugehöriger Datenaustausch - IT-Sicherheit für Daten und Kommunikation - Teil 9: Cyber security Schlüssel-Management für Stromversorgungsanlagen

Gestion des systèmes de puissance et échanges d’informations associés - Sécurité des communications et des données - Partie 9: Gestion de clé de cybersécurité des équipements de système de puissance

IEC 62351-9:2017 porte sur la gestion de clé cryptographique, c'est-à-dire sur la manière de générer, distribuer, révoquer et manipuler les certificats de clé publique et les clés cryptographiques pour protéger les données numériques et leurs communications. La manipulation des clés asymétriques (les clés privées et les certificats de clé publique, par exemple) et les clés symétriques pour les groupes (GDOI) font également partie du domaine d'application de la présente norme. La présente partie de l'IEC 62351 part du principe que d'autres normes ont déjà choisi le type de clés et la cryptographie qui seront utilisés, dans la mesure où les algorithmes de cryptographie et les supports de clé choisis sont en principe liés aux politiques de sécurité locales propres à une organisation et à la nécessité de satisfaire aux autres normes internationales. Le présent document spécifie donc uniquement les techniques de gestion de ces infrastructures de clé et de cryptographie sélectionnées. Il s'agit de définir les exigences et les technologies permettant d'assurer l'interopérabilité de la gestion de clé. La présente partie de l'IEC 62351 a pour objet de garantir l'interopérabilité entre les différents fournisseurs en spécifiant ou limitant les options de gestion de clé à utiliser. Le présent document part du principe que le lecteur comprend les principes de cryptographie et d'infrastructure à clés publiques.

Upravljanje elektroenergetskega sistema in pripadajoča izmenjava informacij - Varnost podatkov in komunikacij - 9. del: Upravljanje računalniške varnosti opreme napajalnih sistemov

Ta del standarda IEC 62351 določa upravljanje kriptografskih ključev, tj. načine ustvarjanja, porazdelitve, preklica in upravljanja potrdil za javne ključe ter kriptografskih ključev za varstvo digitalnih podatkov in povezanih komunikacij. Področje uporabe zajema ravnanje z asimetričnimi ključi (npr. zasebnimi ključi ali potrdili za javne ključe) in s simetričnimi ključi za skupine (GDOI).
Ta del standarda IEC 62351 predvideva, da so bile vrste ključev in kriptografija, ki bodo uporabljeni, v okviru drugih standardov že izbrani, kajti ti izbrani kriptografski algoritmi in gradiva ključev so običajno določeni v lokalnih varnostnih pravilnikih organizacije in na podlagi zahtev za zagotavljanje skladnosti z drugimi mednarodnimi standardi. Ta dokument tako določa zgolj načine upravljanja za te izbrane infrastrukture ključev in kriptografije. Cilj je določitev zahtev in tehnologij za doseganje interoperabilnosti upravljanja ključev.
Namen tega dela standarda IEC 62351 je zagotavljanje interoperabilnosti med različnimi ponudniki z določitvijo ali omejitvijo možnosti upravljanja ključev, ki bodo uporabljene. Ta dokument predvideva, da je bralec razume načela kriptografije in postopke PKI.

General Information

• Status: Published
• Publication Date: 06-Jul-2017
• Withdrawal Date: 21-Jun-2020
• ICS: 33.200 - Telecontrol. Telemetering
• Technical Committee: CLC/TC 57 - Power systems management and associated information exchange
• Drafting Committee: IEC/TC 57 - IEC_TC_57
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 07-Jul-2017
• Completion Date: 07-Jul-2017
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN 62351-9:2017 - Power systems management and associated information exchange - Data and communications security - Part 9: Cyber security key management for power system equipment

Relations

• Replaced By: EN IEC 62351-9:2023 - Power systems management and associated information exchange - Data and communications security - Part 9: Cyber security key management for power system equipment
• Effective Date: 19-Jan-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2017
8SUDYOMDQMHHOHNWURHQHUJHWVNHJDVLVWHPDLQSULSDGDMRþDL]PHQMDYDLQIRUPDFLM
9DUQRVWSRGDWNRYLQNRPXQLNDFLMGHO8SUDYOMDQMHUDþXQDOQLãNHYDUQRVWL
RSUHPHQDSDMDOQLKVLVWHPRY
Power systems management and associated information exchange - Data and
communications security - Part 9: Cyber security key management for power system
equipment
Ta slovenski standard je istoveten z: EN 62351-9:2017
ICS:
29.240.30 Krmilna oprema za Control equipment for electric
elektroenergetske sisteme power systems
35.030 Informacijska varnost IT Security
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62351-9
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2017
ICS 33.200
English Version
Power systems management and associated information
exchange - Data and communications security -
Part 9: Cyber security key management for power system
equipment
(IEC 62351-9 :2017)
Gestion des systèmes de puissance et échanges Energiemanagementsysteme und zugehöriger
d'informations associés - Sécurité des communications et Datenaustausch - IT-Sicherheit für Daten und
des données - Partie 9: Gestion de clé de cybersécurité des Kommunikation - Teil 9: Cyber security Schlüssel-
équipements de système de puissance Management für Stromversorgungsanlagen
(IEC 62351-9 :2017) (IEC 62351-9 :2017)
This European Standard was approved by CENELEC on 2017-06-22. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62351-9:2017 E
European foreword
The text of document 57/1838/FDIS, future edition 1 of IEC 62351-9, prepared by IEC/TC 57 "Power
systems management and associated information exchange" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 62351-9:2017.

The following dates are fixed:
(dop) 2018-03-22
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-06-22
standards conflicting with the
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.

This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association.

Endorsement notice
The text of the International Standard IEC 62351-9:2017 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 62351-3 NOTE Harmonized as EN 62351-3.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When 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/TS 62351-2 -  Power systems management and - -
associated information exchange - Data
and communications security -
Part 2: Glossary of terms
ISO/IEC 9594-8/ 2017 Information technology - Open Systems - -
Interconnection - The Directory -
Rec. ITU-T X.509 2016
Part 8: Public-key and attribute certificate
frameworks
ISO/IEC 9834-1/ 2012 Information technology - Procedures for - -
the operation of object identifier registration
Rec. ITU-T X.660 2011
authorities: General procedures and top
arcs of the international object identifier
tree
RFC 5246 -  The Transport Layer Security (TLS) - -
Protocol Version 1.2
RFC 5272 -  Certificate Management over CMS (CMC) - -
RFC 5934 -  Trust Anchor Management Protocol - -
(TAMP)
RFC 6407 -  The Group Domain of Interpretation - -
IETF RFC 6960 -  X.509 - Internet Public Key Infrastructure - -
Online Certificate Status Protocol - OCSP
RFC 7030 -  Enrolment over Secure Transport - -
SCEP IETF Draft, Simple Certificate Enrolment Protocol, draft-gutmann-scep-04.txt

IEC 62351-9 ®
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
colour
inside
Power systems management and associated information exchange – Data and

communications security –
Part 9: Cyber security key management for power system equipment

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200 ISBN 978-2-8322-4220-9

– 2 – IEC 62351-9:2017 © IEC 2017
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Abbreviations and acronyms . 14
5 Cryptographic applications for power system implementations . 15
5.1 Cryptography, cryptographic keys, and security objectives . 15
5.2 Types of cryptography . 16
5.3 Uses of cryptography . 16
5.3.1 Goals of cyber security . 16
5.3.2 Confidentiality . 17
5.3.3 Data integrity . 17
5.3.4 Authentication. 18
5.3.5 Non-repudiation . 18
5.3.6 Trust . 18
6 Key management concepts and methods in power system operations . 19
6.1 Key management system security policy . 19
6.2 Key management design principles for power system operations . 19
6.3 Use of Transport Layer Security (TLS) . 19
6.4 Cryptographic key usages . 19
6.5 Trust using a public-key infrastructure (PKI). 20
6.5.1 Registration authorities (RA) . 20
6.5.2 Certification authority (CA) . 20
6.5.3 Public-key certificates . 20
6.5.4 Attribute certificates . 21
6.5.5 Public-key certificate and attribute certificate extensions . 21
6.6 Trust via non-PKI self-signed certificates . 22
6.7 Authorization and validation lists . 22
6.7.1 General . 22
6.7.2 AVLs in non-constrained environments . 23
6.7.3 AVLs in constrained environments . 23
6.7.4 Use of self-signed public-key certificates in AVLs . 23
6.8 Trust via pre-shared keys. 23
6.9 Session keys . 24
6.10 Protocols used in trust establishment . 24
6.10.1 Certification request . 24
6.10.2 Trust Anchor Management Protocol (TAMP) . 24
6.10.3 Simple Certificate Enrolment Protocol (SCEP) . 24
6.10.4 Internet X.509 PKI Certificate Management Protocol (CMP) . 24
6.10.5 Certificate Management over CMS (CMC) . 25
6.10.6 Enrolment over Secure Transport (EST) . 25
6.10.7 Summary view on the different protocols . 25
6.11 Group keys . 26
6.11.1 Purpose of group keys . 26
6.11.2 Group Domain of Interpretation (GDOI) . 26
6.12 Key management lifecycle . 31

IEC 62351-9:2017 © IEC 2017 – 3 –
6.12.1 Key management in the life cycle of an entity . 31
6.12.2 Cryptographic key lifecycle . 32
6.13 Certificate management processes . 34
6.13.1 Certificate management process . 34
6.13.2 Initial certificate creation . 34
6.13.3 Enrolment of an entity . 34
6.13.4 Certificate signing request (CSR) process . 36
6.13.5 Certificate revocation lists (CRLs) . 37
6.13.6 Online certificate status protocol (OCSP) . 38
6.13.7 Server-based certificate validation protocol (SCVP) . 41
6.13.8 Short-lived certificates . 41
6.13.9 Certificate renewal . 42
6.14 Alternative process for asymmetric keys generated outside the entity . 43
6.15 Key distribution for symmetric keys with different time frames . 44
7 General key management requirements . 44
7.1 Asymmetric and symmetric key management requirements . 44
7.2 Required cryptographic materials . 44
7.3 Public-Key certificates requirements . 45
7.4 Cryptographic key protection. 45
7.5 Use of existing se
...