IEC IEC TS 60870-5-7 Edition 2.02025-03 TECHNICAL SPECIFICATION Telecontrol equipment and systems Part 5-7: Transmission protocols - Security extensions to IEC 60870-5-101 and IEC 60870-5-104 protocols (applying IEC 62351) IEC TS 60870-5-7:2025-03(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright @ 2025 IEC, Geneva, Switzerland 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, piease contact the address below or your local IEC member National Committee for further information. IEC Secretariat Tel.: +41 22 919 02 11 3, rue de Varembé [email protected] 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. 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 corrigendum or an amendment might have been published. IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the publications previews, graphical symbols and the glossary. ofcriteria (reference number, text, technical variety committee, ...). It also gives information on projects, replaced With a subscription you wili always have access to up to date and withdrawn publications. content tailored to your needs. IEc Just Published - webstore.iec.ch/justpublished Electropedia - www.electropedia.org Stay up to date on all new IEC publications. Just Published The world's leading online dictionary on electrotechnology, details all new publications released. Available online and once containing more than 22 500 terminological entries in English a month by email. and French, with equivalent terms in 25 additional languages. Also known as the International Electrotechnical Vocabulary IEC Customer Service Centre - webstore.iec.ch/csc (IEV) online If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: [email protected]. IEC IEC TS 60870-5-7 Edition 2.02025-03 TECHNICAL SPECIFICATION Telecontrol equipment and systems - Part 5-7: Transmission protocols - Security extensions to IEC 60870-5-101 and IEC 60870-5-104 protocols (applying IEC 62351) INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.200 ISBN 978-2-8327-0275-8 Warning! Make sure that you obtained this publication from an authorized distributor. ? Registered trademark of the International Electrotechnical Commission - 2 - IEC TS 60870-5-7:2025 @ IEC 2025 CONTENTS FOREWORD Scope 7 6 6 2 Normative references.. 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions. 3.2 Abbreviated terms. 8 4 Overview of IEC 60870-5-7 profiles . 9 A-Profile: Implementation of IEC 62351-5. 5 9 5.1 General . 9 5.2 Selected options. 9 5.2.1 Overview of clause 9 5.2.2 MAC algorithms 10 5.2.3 Encryption algorithms 10 5.3 Implementation of procedures 10 5.3.1 Overview of clause.. 10 5.3.2 Detection of communication failures 10 5.3.3 Algorithm selection for Update Keys derivation 5.3.4 Session keys - Application and management... .10 5.3.5 .13 Co-existence with non-secure implementations . 5.4 Implementation of messages.. 13 5.4.1 Overview of clause... .13 5.4.2 Data definitions... .14 5.4.3 Application Service Data Units , 19 T-Profile Security: Implementation of IEC 62351-3 ... 6 .37 7 Security profiles for IEC 60870-5-101 and IEC 60870-5-104 .38 7.1 General ...38 7.2 ..38 Security profiles for IEC 60870-5-101 .38 7.3 Security profiles for IEC 60870-5-1