상세정보
학술지
Cryptanalysis of Block-Wise Stream Ciphers Suitable for the Protection of Multimedia and Ubiquitous Systems
- 저자
- 이덕규, 김종석, 성재철, 이양선, 노승민
- 발행일
- 201008
- 출처
- Telecommunication Systems, v.44 no.3, pp.297-306
- ISSN
- 1018-4864
- 출판사
- Springer
- 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.
- KSP 제안 키워드
- Case studies, General Framework, Related-key attack, Stream cipher, Time Complexity, Ubiquitous system, data complexity