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학술지 Cryptanalysis of Block-Wise Stream Ciphers Suitable for the Protection of Multimedia and Ubiquitous Systems
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저자
이덕규, 김종석, 성재철, 이양선, 노승민
발행일
201008
출처
Telecommunication Systems, v.44 no.3, pp.297-306
ISSN
1018-4864
출판사
Springer
DOI
https://dx.doi.org/10.1007/s11235-009-9255-9
초록
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.
키워드
Block-wise stream ciphers, Related-key attacks, Security analysis, TWOPRIME
KSP 제안 키워드
Case studies, General Framework, Related-key attack, Stream cipher, Time Complexity, Ubiquitous system, data complexity, security analysis