Paper 2020/349

Differential Power Analysis on (Non-)Linear Feedback Shift Registers

Siang Meng Sim

Abstract

Differential power analysis (DPA) is a statistical analysis of the power traces of cryptographic computations. DPA has many applications including key-recovery on linear feedback shift register based stream ciphers. In 2017, Dobraunig et. al. presented a DPA on Keymill to uncover the bit relations of neighbouring bits in the shift registers, effectively reduces the internal state guessing space to 4-bit. In this work, we generalise the analysis methodology to uncover more bit relations on both linear feedback shift registers (LFSRs) and non-linear feedback shift registers (NLFSRs) and with application to fresh re-keying scheme --- LR-Keymill. In addition, we improve the DPA on Keymill by halving the data resources needed for the attack.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
SCADPALFSRNLFSRFresh re-keying schemeKeymillLR-Keymill
Contact author(s)
crypto s m sim @ gmail com
History
2020-03-30: revised
2020-03-26: received
See all versions
Short URL
https://ia.cr/2020/349
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2020/349,
      author = {Siang Meng Sim},
      title = {Differential Power Analysis on (Non-)Linear Feedback Shift Registers},
      howpublished = {Cryptology {ePrint} Archive, Paper 2020/349},
      year = {2020},
      url = {https://eprint.iacr.org/2020/349}
}
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