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Security of Jump Controlled Sequence Generators for Stream Ciphers
The Selmer Center, Department of Informatics, University of Bergen, Norway.
Banksys NV, Brussels, Belgium.
Zaeim Electronic Industries Company, Tehran, Iran.
The Selmer Center, Department of Informatics, University of Bergen, Norway.
2006 (English)In: Lecture notes in computer science, ISSN 0302-9743, Vol. 4086, 141-152 p.Article in journal (Refereed) Published
Abstract [en]

The use of jump control technique provides efficient and secure ways for generating key-stream for stream ciphers. This design approach was recently implemented in some algorithms submitted to eSTREAM, the ECRYPT Stream Cipher Project. However, inappropriately chosen parameters for jumping constructions can completely undermine their security. In this paper we describe a new inherent property of jump registers that allows to construct linear relations in their output. We illustrate our results by building a key-recovery attack on the Pomaranch stream cipher. We also suggest a slight modification to the jump register configuration in Pomaranch that allows to protect against this type of attacks.

Place, publisher, year, edition, pages
2006. Vol. 4086, 141-152 p.
Keyword [en]
Cryptanalysis, jump register, key-stream generator, linear relations, Pomaranch, stream cipher
National Category
Computer Science
Identifiers
URN: urn:nbn:se:kth:diva-70480DOI: 10.1007/11863854_12ISI: 000241183000012OAI: oai:DiVA.org:kth-70480DiVA: diva2:486416
Conference
SETA’06
Note
4th International Conference on Sequences and Their Applications (SETA 2006), Beijing, PEOPLES R CHINA, 2006. QC 20120203Available from: 2012-01-30 Created: 2012-01-30 Last updated: 2012-02-03Bibliographically approved

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