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eprint.iacr.orgpaper

Practical Collision Attacks on 22- and 23-Step SM3 (Preliminary Version)

Preliminary IACR ePrint paper giving practical collision attacks on 22- and 23-step reduced SM3 with the standard initial value, at about 2^52.4 and 2^54.5 reduced-round evaluations. It extends the 20-step result of Mendel et al. (2013) by two and three steps. It also presents a semi-free-start collision for 24-step SM3. SM3 is the 256-bit hash in GB/T 32905-2016 and ISO/IEC 10118-3:2018.

TL;DR Presents practical collisions on 22- and 23-step SM3 and a 24-step semi-free-start collision, beating the 20-step record.
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Technologies named here

  • SM3

Standards and laws named here

  • GB/T 32905-2016
  • ISO/IEC 10118-3:2018

Techniques named here

  • collision attack
  • semi-free-start collision

Concepts named here

  • Collision resistance
  • Reduced-round hash cryptanalysis

Also named here

  • Mendel et al.

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