SM3 (hash function)

ShangMi 3 (SM3) is a cryptographic hash function, standardised for use in commercial cryptography in China.^[1] It was published by the National Cryptography Administration (Chinese: 国家密码管理局) on 2010-12-17^[2][3] as "GM/T 0004-2012: SM3 cryptographic hash algorithm".^[2]

SM3

General
Designers	National Cryptography Administration
First published	2010

SM3 is used for implementing digital signatures, message authentication codes, and pseudorandom number generators.^[4] The algorithm is public^[5][6] and is considered similar to SHA-256 in security and efficiency.^[7] SM3 is used with Transport Layer Security.^[8]

Attacks

Cryptanalysis

Shen Y Z, Bai D X, Yu H B. Improved cryptanalysis of step-reduced SM3. Sci China Inf Sci, 2018, 61(3): 038105, doi: 10.1007/s11432-017-9119-6

Side channel

Christophe Clavier and Leo Reynaud and Antoine Wurcker. Yet Another Side Channel Cryptanalysis on SM3 Hash Algorithm (2019). https://eprint.iacr.org/2019/346.

Definitive standards

SM3 is defined in each of:

• GM/T 0004-2012: SM3 cryptographic hash algorithm^[2]
• GB/T 32905-2016: Information security techniques—SM3 cryptographic hash algorithm^[9]
• ISO/IEC 10118-3:2018—IT Security techniques—Hash-functions—Part 3: Dedicated hash-functions
• IETF RFC draft-sca-cfrg-sm3-02^[4]