Known-key attack on SM4 block cipher

Hyung Chul Kang, Deukjo Hong, Jaechul Sung, Seokhie Hong

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We present thefirst known-key attackon SM4, which is the Chinese standard block cipher made for the wireless LAN WAPI. We make a known-key distinguisher using rebound techniques with the time complexity of 212.75. Then, with the distinguisher, we provide near-collision attacks on MMO and MP hash modes of SM4. Precisely, we find a 104-bit near-collision for 13 rounds of SM4 with the time complexity of 213.30 and a 32-bit near-collision for 17 rounds of SM4 with the time complexity of 212.91. They are much more efficient than generic attacks for the case of random permutation.

Original languageEnglish
Pages (from-to)2985-2990
Number of pages6
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Issue number12
Publication statusPublished - 2017 Dec

Bibliographical note

Funding Information:
This paper was supported by research funds for newly appointed professors of Chonbuk National University in 2015. This work was supported by Institute for Information & communications Technology Promotion (IITP) grant funded by the Korea government (MSIT) (No.2017-0-00520, Development of SCR-Friendly Symmetric Key Cryptosystem and Its Application Modes).

Publisher Copyright:
Copyright © 2017 The Institute of Electronics, Information and Communication Engineers.


  • Collision attack
  • Known-key distinguisher
  • SM4 block cipher

ASJC Scopus subject areas

  • Signal Processing
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering
  • Applied Mathematics


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