首页|Zero-Correlation Linear Cryptanalysis on SPARX-64
Zero-Correlation Linear Cryptanalysis on SPARX-64
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NSTL
Hindawi Publishing Group
SPARX is a family of ARX-based block ciphers designed according to the long-trail strategy, which has 32-bit ARX-based SBoxes and has provable bounds against single-differential and single-linear cryptanalysis. Since its proposation, some third-party cryptanalysis methods have been presented. As far as we know, the best attacks against SPARX-64 covered 16 (out of 24)rounds. In this paper, we propose zero-correlation linear attacks on SPARX-64. At first, we construct some new zero-correlation linear distinguishers covering 14-round and 15-round SPARX-64. Then, 15,16,17 and 18-round versions can be attacked using multidimensional or multiple zero-correlation linear attack models, under DKP(distinct known plaintexts)settings. These are the best attacks against SPARX-64 up to now, regarding to the number of attacked rounds. Finally, we transform the zero-correlation distinguishers into integral ones using existing methods, which are also longer than the ones proposed by the designers.
Dawei Zhou、Huaifeng Chen、Rui Zong、Ningning Song、Chao Wang
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Department of Information Security, Naval University of Engineering
The 6th Research Institute of China Electronics Corporation
NSTL
Hindawi Publishing Group
