Foreword

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This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 31, Automatic identification and data capture techniques.

This second edition cancels and replaces the first edition (ISO/IEC 29167-21:2018), which has been technically revised.

The main change is as follows: Annex E has been updated to reflect changes to the over-the-air protocol.

A list of all parts in the ISO/IEC 29167 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.

Introduction

This document provides a common crypto suite for security for radio frequency identification (RFID) devices. The crypto suite is defined in alignment with existing air interfaces and specifies a variety of security services provided by the lightweight block cipher SIMON.

1 Scope

This document specifies the crypto suite for SIMON for the ISO/IEC 18000 air interface standards for radio frequency identification (RFID) devices.

SIMON is a symmetric block cipher that is parameterized in both its block length and key length. The block/key length options supported in this crypto suite (in bits) are 64/96, 96/96, 64/128, 128/128 and 128/256.

In this document, a Tag and an Interrogator can support one, a subset or all of the specified options, clearly stating what is supported.

2 Normative references

3 Terms, definitions, symbols and abbreviated terms

3.1 Terms and definitions

3.2 Symbols

3.3 Abbreviated terms

4 Conformance

4.1 Air interface protocol specific information

4.2 Interrogator conformance and obligations

4.3 Tag conformance and obligations

5 Overview of the SIMON crypto suite

6 Parameter and variable descriptions

7 Crypto suite state diagram

8 Initialization and resetting

9 Authentication

9.1 General

9.2 Message and response formatting

9.3 Tag authentication (AuthMethod “00”)

9.4 Interrogator authentication (AuthMethod “01”)

9.5 Mutual authentication (AuthMethod “10”)

10 Communication

10.1 General

10.2 Message and response formatting

10.3 Transforming a payload prior to encapsulation

10.4 Processing an encapsulated or cryptographically-protected reply

11 Key table and key update

Bibliography