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Cryptanalysis of block-wise stream ciphers suitable for the protection of multimedia and ubiquitous systems
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- Authors
- Deok Gyu Lee, Jongsung Kim, Jaechul Sung, Yang Sun Lee, Seungmin Rho
- Issue Date
- 2010-08
- Citation
- Telecommunication Systems, v.44, no.3, pp.297-306
- ISSN
- 1018-4864
- Publisher
- Springer
- Language
- English
- Type
- Journal Article
- Abstract
- In this paper we introduce a general framework of related-key attack on block-wise stream ciphers which are suitable for the protection of multimedia and ubiquitous systems. As a case study, we show how our cryptanalytic framework is applied to a block-wise stream cipher TWOPRIME: we construct various related-key differentials of TWOPRIME and use them to show that recovering related keys of TWOPRIME can be performed with a data complexity of 2 14 known plaintext blocks and a time complexity of 232 8-bit table lookups. We expect that our general framework for a related-key attack would be useful tool for analyzing many of block-wise stream ciphers. © Springer Science+Business Media, LLC 2010.
- KSP Keywords
- Case studies, General Framework, Related-key attack, Stream cipher, Time Complexity, Ubiquitous system, data complexity