Paper 2015/241

Espresso: A Stream Cipher for 5G Wireless Communication Systems

Elena Dubrova and Martin Hell

Abstract

The demand for more efficient ciphers is a likely to sharpen with new generation of products and applications. Previous cipher designs typically focused on optimizing only one of the two parameters - hardware size or speed, for a given security level. In this paper, we present a methodology for designing a class of stream ciphers which takes into account both parameters simultaneously. We combine the advantage of the Galois configuration of NLFSRs, short propagation delay, with the advantage of the Fibonacci configuration of NLFSRs, which can be analyzed formally. According to our analysis, the presented stream cipher Espresso is the fastest among the ciphers below 1500 GE, including Grain-128 and Trivium.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
stream cipherencryptionFSR5G
Contact author(s)
dubrova @ kth se
History
2015-03-19: received
Short URL
https://ia.cr/2015/241
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2015/241,
      author = {Elena Dubrova and Martin Hell},
      title = {Espresso: A Stream Cipher for 5G Wireless Communication Systems},
      howpublished = {Cryptology ePrint Archive, Paper 2015/241},
      year = {2015},
      note = {\url{https://eprint.iacr.org/2015/241}},
      url = {https://eprint.iacr.org/2015/241}
}
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