INTERNATIONAL ISO/IEC STANDARD 9798-2 Fourth edition 2019-06 IT Security techniques Entity authentication - Part 2: Mechanisms using authenticated encryption Techniques de sécurite IT-Authentification d'entité- Partie2:Mecanismes utilisant le chiffrement authentifie Reference number IEC ISO/IEC9798-2:2019(E) @IS0/IEC2019 IS0/IEC9798-2:2019(E) COPYRIGHTPROTECTEDDOCUMENT @IS0/IEC2019 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 orIso's memberbody in the countryof therequester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier,Geneva Phone:+41227490111 Fax:+41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @IS0/IEC 2019-All rights reserved