ISO/IEC 9797-1:2011/Amd 1:2023

INTERNATIONAL ISO/IEC
STANDARD 9797-1
Second edition
2011-03-01
AMENDMENT 1
2023-08
Information technology — Security
techniques — Message Authentication
Codes (MACs) —
Part 1:
Mechanisms using a block cipher
AMENDMENT 1
Technologies de l'information — Techniques de sécurité — Codes
d'authentification de message (MAC) —
Partie 1: Mécanismes utilisant un chiffrement par blocs
AMENDEMENT 1
Reference number
ISO/IEC 9797-1:2011/Amd. 1:2023(E)
© ISO/IEC 2023

---------------------- Page: 1 ----------------------
ISO/IEC 9797-1:2011/Amd. 1:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2023
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
  © ISO/IEC 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/IEC 9797-1:2011/Amd. 1:2023(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical
activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the
work.
The procedures used to develop this document and those intended for its further maintenance
are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria
needed for the different types of document should be noted. This document was drafted in
accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives or
www.iec.ch/members_experts/refdocs).
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC
...