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Lightweight Cryptography

Lightweight cryptography standards are published by IEC and ISO. They include the ISO/IEC 29192 series, which covers block ciphers, stream ciphers, asymmetric techniques, and hash functions.

ISO/IEC 29192-1:2012

Information technology - Security techniques - Lightweight cryptography - Part 1: General

ISO/IEC 29192-1:2012 provides terms and definitions that apply in subsequent parts of ISO/IEC 29192. ISO/IEC 29192-1:2012 sets the security requirements, classification requirements and implementation requirements for mechanisms that are proposed for inclusion in subsequent parts of ISO/IEC 29192.

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ISO/IEC 29192-2:2019

Information security - Lightweight cryptography - Part 2: Block ciphers

This document specifies three block ciphers suitable for applications requiring lightweight cryptographic implementations: PRESENT: a lightweight block cipher with a block size of 64 bits and a key size of 80 or 128 bits; CLEFIA: a lightweight block cipher with a block size of 128 bits and a key size of 128, 192 or 256 bits; LEA: a lightweight block cipher with a block size of 128 bits and a key size of 128, 192 or 256 bits.

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ISO/IEC 29192-3:2012

Information technology - Security techniques - Lightweight cryptography - Part 3: Stream ciphers

ISO/IEC 29192-3:2012 specifies two dedicated keystream generators for lightweight stream ciphers: Enocoro: a lightweight keystream generator with a key size of 80 or 128 bits; Trivium: a lightweight keystream generator with a key size of 80 bits.

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ISO/IEC 29192-4:2013

Information technology - Security techniques - Lightweight cryptography - Part 4: Mechanisms using asymmetric techniques

ISO/IEC 29192-4:2013 specifies three lightweight mechanisms using asymmetric techniques: a) a unilateral authentication mechanism based on discrete logarithms on elliptic curves; b) an authenticated lightweight key exchange (ALIKE) mechanism for unilateral authentication and establishment of a session key; c) an identity-based signature mechanism.

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ISO/IEC 29192-5:2016

Information technology - Security techniques - Lightweight cryptography - Part 5: Hash-functions

ISO/IEC 29192-5:2016 specifies three hash-functions suitable for applications requiring lightweight cryptographic implementations. - PHOTON: a lightweight hash-function with permutation sizes of 100, 144, 196, 256 and 288 bits computing hash-codes of length 80, 128, 160, 224, and 256 bits, respectively. - SPONGENT: a lightweight hash-function with permutation sizes of 88, 136, 176, 240 and 272 bits computing hash-codes of length 88, 128, 160, 224, and 256 bits, respectively. - Lesamnta-LW: a lightweight hash-function with permutation size 384 bits computing a hash-code of length 256 bits. The requirements for lightweight cryptography are given in ISO/IEC 29192 1.

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