IEEE SA STANDARDS. ASSOCIATION ISTANDARDS IEEE Standard for Local and Metropolitan Area Networks- Media Access Control (MAC) Security Amendment 4: MAC Privacy Protection IEEE Computer Society Developed by the LAN/MAN Standards Committee IEEE Std 802.1AEdkTM-2023 (Amendment to IEEE Std 802.1AETM-2018 as amended by IEEE Std 802.1AE-2018/Cor 1-2020) IEEE IEEE Std 802.1AEdk-2023 (Amendment to IEEE Std 802.1AE TM-2018 as amended by IEEE Std 802.1AE-2018/Cor 1-2020) IEEE Standard for Local and Metropolitan Area Networks- Media Access Control (MAC) Security Amendment 4: MAC Privacy Protection Developed by LAN/MAN Standards Committee of the IEEE Computer Society Abstract: This amendment specifies a MA Privacy protection encapsulating protocol and its use in conjunction with the MAC Security protocol (MACsec) to hide the source and destination MAC addresses of user data frames, and to reduce any correlation between observable frame sizes and transmission timing. This helps to protect user and application identities and to hide the purpose and content of communications. Management of MACsec and privacy protection is supported by YANG models and SNMP MIBs. Privacy considerations for bridged networks are reviewed. Keywords: amendment, authorized port, bridged networks, confidentiality, corrigendum, data origin authenticity, EDEs, IEEE 802.1AE, integrity, LANs, local area networks, MAC Bridges, MAC security, MAC Service, MANs, metropolitan area networks, port based network access control, privacy, secure association, security, transparent bridging The Institute of Electrical and Electronics Engineers, Inc. 3ParkAvenue,NewYork,NY10016-5997,USA Copyright 2023 by the Institute of Electrical and Electronics Engineers, Inc All rights reserved. Published 18 August 2023. Printed in the United States of America. IEEE and 802 are registered trademarks in the U.S. Patent & Trademark Office, owned by the Institute of Electrical and Electronics Engineers, Incorporated. Print: ISBN 978-1-5044-9950-7 STD26329 PDF: ISBN 978-1-5044-9951-4 STDPD26329 IEEE prohibits discrimination, harassment, and bullying. For more information, visit http://www.ieee.org/web/aboutus/whatis/policies/p9-26.html No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior writtenpermissionofthepublisher