SB nº 265 Contact – TCK Byte requirements in ATR
EMV<sup>®</sup> Specification Bulletin No. 265 First Edition February 2022 Contact – TCK Check Character Requirement in ATR This Specification Bulletin clarifies the terminal requirements when handling the TCK byte in the ATR and as a consequence clarifies when an ICC may return a TCK byte
Applicability
This Specification Bulletin applies to:
- EMV Integrated Circuit Card Specifications for Payment Systems, Book 1 - Application Independent ICC to Terminal Interface Requirements, Version 4.3, November 2011.
Related Documents
- INTERNATIONAL STANDARD, ISO/IEC 7816-3, Identification cards — Integrated circuit cards — Part 3: Cards with contacts — Electrical interface and transmission protocols, Third edition, 200611-01
Description
The handling of the TCK byte of an ATR presenting T=0 only protocol and other scenarios by the terminal is clarified in line with ISO/IEC standards and as a consequence the requirements for when an ICC may return a TCK is clarified. For terminals: Requirements The changes (new requirements) in this bulletin EMV Book 1 version 4.3 The changes (new requirements) in this bulletin Date for application Approved terminals due for renewal: from January 2026 New terminal approvals: until end December 2022 New terminal approvals: from January 2023
countries.
For cards: Requirements The changes (new requirements) in this bulletin EMV Book 1 version 4.3 The changes (new requirements) in this bulletin Date for application Approved cards due for renewal: from January 2024 New card approvals: until end December 2022 New card approvals: from January 2023 Specification Changes 8.3.4 TCK - Check Character … An ATR shall contain TCK if a protocol type other than T=0 is indicated and shall not contain TCK if T=0 only is indicated. Basic responses: The ATR shall not contain TCK if T=0 only is to be usedindicated. In all other cases TCK shall be returned in the ATR. Terminal behaviour: The terminal shall be able to evaluate TCK when appropriately returned. It shall accept an ICC returning an ATR: o containing a correct TCK if a protocol type other than T=0 is indicated, and o not containing TCK if T=0 only is indicated. In all other cases, tThe terminal shall reject an ICC returning an ATR: o not containing TCK if a protocol type other than T=0 is indicated, or o containing TCK if T=0 only is indicated, or o containing an incorrect TCK.
countries.
Legal Notice
The EMV<sup>®</sup> Specifications are provided "AS IS" without warranties of any kind, and EMVCo neither assumes nor accepts any liability for any errors or omissions contained in these Specifications. EMVCO DISCLAIMS ALL REPRESENTATIONS AND WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT, AS TO THESE SPECIFICATIONS. EMVCo makes no representations or warranties with respect to intellectual property rights of any third parties in or in relation to the Specifications. EMVCo undertakes no responsibility to determine whether any implementation of the EMV<sup>®</sup> Specifications may violate, infringe, or otherwise exercise the patent, copyright, trademark, trade secret, know-how, or other intellectual property rights of third parties, and thus any person who implements any part of the EMV<sup>®</sup> Specifications should consult an intellectual property attorney before any such implementation. Without limiting the foregoing, the Specifications may provide for the use of public key encryption and other technology, which may be the subject matter of patents in several countries. Any party seeking to implement these Specifications is solely responsible for determining whether its activities require a license to any such technology, including for patents on public key encryption technology. EMVCo shall not be liable under any theory for any party’s infringement of any intellectual property rights in connection with the EMV<sup>®</sup> Specifications
countries.