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

Siang Meng Sim

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: SCA DPA LFSR NLFSR Fresh re-keying scheme Keymill LR-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: 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}
}