Two Dragons - A Family of Fast Word-based Stream Ciphers

Matt Henricksen

2012

Abstract

The EU eSTREAMcompetition selected two portfolios of stream ciphers, from among thirty-four candidates, with members that were either fast in software or compact in hardware. Dragon was among the eight finalists in the software category. While meeting the performance requirement of being faster than the Advanced Encryption Standard (AES) on many platforms, it was less efficient than the four ciphers selected for the portfolio. Cryptanalysis revealed some less-than-ideal properties. In this paper, we provide some new insights into Dragon, and propose two modifications: Black Dragon, which is tailored for efficient implementation in modern SIMD architectures; and Yellow Dragon, which utilizes recent developments in Chinese block ciphers. We show the improved security and performance of these two variants.

Paper Citation

in Harvard Style

Henricksen M. (2012). Two Dragons - A Family of Fast Word-based Stream Ciphers . In Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2012) ISBN 978-989-8565-24-2, pages 35-44. DOI: 10.5220/0004014000350044

in Bibtex Style

@conference{secrypt12,
author={Matt Henricksen},
title={Two Dragons - A Family of Fast Word-based Stream Ciphers},
booktitle={Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2012)},
year={2012},
pages={35-44},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004014000350044},
isbn={978-989-8565-24-2},
}

in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2012)
TI - Two Dragons - A Family of Fast Word-based Stream Ciphers
SN - 978-989-8565-24-2
AU - Henricksen M.
PY - 2012
SP - 35
EP - 44
DO - 10.5220/0004014000350044