Paper 2007/380

X-FCSR: a new software oriented stream cipher based upon FCSRs

Francois Arnault, Thierry P. Berger, Cédric Lauradoux, and Marine Minier

Abstract

Feedback with Carry Shift Registers (FCSRs) are a promising alternative to LFSRs in the design of stream cipher. The previous constructions based on FCSRs were dedicated to hardware applications. In this paper, we will describe X-FCSR a family of software oriented stream cipher using FCSRs. The core of the system is composed of two 256-bits FCSRs. We propose two versions: X-FCSR-128 and X-FCSR-256 which output respectively 128 and 256 bits at each iteration. We study the resistance of our design against several cryptanalyses. In this way, we achieve a high throughput and secure stream ciphers suitable for software applications (6.3 cycles/byte).

Metadata
Available format(s)
PDF PS
Category
Secret-key cryptography
Publication info
Published elsewhere. this paper was accepted as a short paper at Indocrypt 2007
Keywords
stream cipherFCSRssoftware designcryptanalysis
Contact author(s)
marine minier @ insa-lyon fr
History
2007-09-27: received
Short URL
https://ia.cr/2007/380
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2007/380,
      author = {Francois Arnault and Thierry P.  Berger and Cédric Lauradoux and Marine Minier},
      title = {X-FCSR: a new software oriented stream cipher based upon FCSRs},
      howpublished = {Cryptology ePrint Archive, Paper 2007/380},
      year = {2007},
      note = {\url{https://eprint.iacr.org/2007/380}},
      url = {https://eprint.iacr.org/2007/380}
}
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