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Paper 2013/096

State convergence in bit-based stream ciphers

Sui-Guan Teo and Harry Bartlett and Ali Alhamdan and Leonie Simpson and Kenneth Koon-Ho Wong and Ed Dawson

Abstract

Well-designed initialisation and keystream generation processes for stream ciphers should ensure that each key-IV pair generates a distinct keystream. In this paper, we analyse some ciphers where this does not happen due to state convergence occurring either during initialisation, keystream generation or both. We show how state convergence occurs in each case and identify two mechanisms which can cause state convergence.

Note: Under review

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
Stream ciphersstate convergenceMickeyA51Sfinks
Contact author(s)
teosuiguan @ gmail com
History
2013-02-27: received
Short URL
https://ia.cr/2013/096
License
Creative Commons Attribution
CC BY
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