ISO/IEC 14443-4:2018/Amd 3

FINAL DRAFT
Amendment
ISO/IEC
14443-4:2018/
FDAM 3
ISO/IEC JTC 1/SC 17
Cards and security devices
Secretariat: BSI
for personal identification —
Voting begins on:
Contactless proximity objects —
2026-06-10
Part 4:
Voting terminates on:
2026-08-05
Transmission protocol
AMENDMENT 3: Relay attack
protection mechanisms
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Reference number
ISO/IEC 14443­4:2018/FDAM 3:2026(en) © ISO/IEC 2026

FINAL DRAFT
ISO/IEC 14443-4:2018/FDAM 3:2026(en)
Amendment
ISO/IEC
14443-4:2018/
FDAM 3
ISO/IEC JTC 1/SC 17
Cards and security devices
Secretariat: BSI
for personal identification —
Voting begins on:
Contactless proximity objects —
Part 4:
Voting terminates on:
Transmission protocol
AMENDMENT 3: Relay attack
protection mechanisms
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO/IEC 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
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TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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Published in Switzerland Reference number
ISO/IEC 14443­4:2018/FDAM 3:2026(en) © ISO/IEC 2026

© ISO/IEC 2026 – All rights reserved
ii
ISO/IEC 14443-4:2018/FDAM 3:2026(en)
Foreword
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IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs).
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In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 17, Cards and security devices for personal identification.
A list of all parts in the ISO/IEC 14443 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards
body. A complete listing of these bodies can be found at www.iso.org/members.html and
www.iec.ch/national-committees.

© ISO/IEC 2026 – All rights reserved
iii
ISO/IEC 14443-4:2018/FDAM 3:2026(en)
Cards and security devices for personal identification —
Contactless proximity objects —
Part 4:
Transmission protocol
AMENDMENT 3: Relay attack protection mechanisms

4.1
Replace “A Hamming control bits generation matrix (6 rows, 56 columns)” by “A Hamming control generation
matrix (6 rows, 56 columns)”.
4.1
Replace “ 64-bit vector ( with no padding bits)” by “ 62-bit vector ( with no padding bits)”.
5.1
Replace the last paragraph with: “The RFU handling specified in ISO/IEC 14443-3:2018, 5.3 applies for
Clause 5, unless specified otherwise.”
5.4.2
Add the following after the second paragraph: “A PICC receiving (b4 to b1) <> (0001)b and/or receiving
(b8 to b6) <> (000)b may apply 5.7.2.2 (b).”
7.4
Replace the last paragraph with: “The temporary FWT applies only until the next block (valid or not) has
been received by the PCD or a FWT time-out occurs.
NOTE Unless the PICC requests again for a waiting time extension after reception of an R(NAK), the definedFWT
is no more extended.”
7.6.1
Replace the second paragraph with: “The PCD may initiate an exchange of S(PARAMETERS) after
reception of any PICC block without transmission error or FWT time-out, also during PCD chaining or PICC
chaining before it continues block exchange with the new parameter settings (if modified by the PCD and
acknowledged by the PICC).
To ensure interoperability with legacy PCDs and PICCs, the following behaviour is accepted until 2032: the
PCD may initiate an exchange of S(PARAMETERS) at any time also during PCD chaining or PICC chaining or
error handling, before it continues block exchange with the new parameter settings (if modified by the PCD
and acknowledged by the PICC).”
In Table 5, row 1, column 4, replace “Tables 6 and 7, in any order” with “Tables 6, 7 and 8, in any order unless
otherwise specified”.
7.6.3
© ISO/IEC 2026 – All rights reserved
ISO/IEC 14443-4:2018/FDAM 3:2026(en)
Delete the words "Assertion: PICC maxi" in the top of Figure 23.
7.6.5.1
Replace Rule 3 with: “S-blocks are only used in pairs. An S(.) request block shall always be followed by
an S(.) response block (see 7.4, 7.6.1 and Clause 8) except for PICCs
...