INTERNATIONAL ISO/IEC STANDARD 11770-5 Secondedition 2020-11 Information security Key management - Part 5: Group key management Sécurite de I'information - Gestion de clés - Partie 5: Gestion de clés de groupe Referencenumber IEC IS0/IEC 11770-5:2020(E) ISO IS0/IEC2020 IS0/IEC 11770-5:2020(E) COPYRIGHTPROTECTEDDOCUMENT @IS0/IEC2020 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2020 - All rights reserved