Paper 2014/051
An Equivalence-Preserving Transformation of Shift Registers
Elena Dubrova
Abstract
The Fibonacci-to-Galois transformation is useful for reducing the propagation delay of feedback shift register-based stream ciphers and hash functions. In this paper, we extend it to handle Galois-to-Galois case as well as feedforward connections. This makes possible transforming Trivium stream cipher and increasing its keystream data rate by 27\% without any penalty in area. The presented transformation might open new possibilities for cryptanalysis of Trivium, since it induces a class of stream ciphers which generate the same set of keystreams as Trivium, but have a different structure.
Metadata
- Available format(s)
-
PDF
- Category
- Foundations
- Publication info
- Published elsewhere. Minor revision. Sequences and Their Applications - SETA'2014, Springer
- Keywords
- Feedback shift registerNLFSRFibonacci configurationGalois configurationstream cipher
- Contact author(s)
- dubrova @ kth se
- History
- 2014-11-18: revised
- 2014-01-22: received
- See all versions
- Short URL
- https://ia.cr/2014/051
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2014/051,
author = {Elena Dubrova},
title = {An Equivalence-Preserving Transformation of Shift Registers},
howpublished = {Cryptology {ePrint} Archive, Paper 2014/051},
year = {2014},
url = {https://eprint.iacr.org/2014/051}
}
