New Impossible Differential Attacks of Reduced-Round Camellia-192 and Camellia-256

被引：0
|
作者：
Chen, Jiazhe [1 ,2 ]
Jia, Keting [3 ]
Yu, Hongbo [4 ]
Wang, Xiaoyun [1 ,2 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Cryptol Technol & Informat Secur, Jinan 250100, Peoples R China
[2] Shandong Univ, Sch Math, Jinan 250100, Peoples R China
[3] Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China
[4] Tsinghua Univ, Dept Comp Sci &Technol, Beijing 100084, Peoples R China
来源：
INFORMATION SECURITY AND PRIVACY | 2011年 / 6812卷
基金：
中国国家自然科学基金;
关键词：
Camellia Block Cipher; Cryptanalysis; Impossible Differential; Impossible Differential Attack; CRYPTANALYSIS;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Camellia, which is a block cipher selected as a standard by ISO/IEC, is one of the most widely used block ciphers. In this paper, we propose several 6-round impossible differentials of Camellia with FL/FL-1 layers in the middle of them. With the impossible differentials and a well-organized precomputed table, impossible differential attacks on 10-round Camellia-192 and 11-round Camellia-256 are given, and the time complexities are 2(175.3) and 2(206.8) respectively. In addition, an impossible differential attack on 15-round Camellia-256 without FL/FL-1 layers and whitening is also be given, which needs about 2(236.1) encryptions. To the best of our knowledge, these are the best cryptanalytic results of Camellia-192/-256 with FL/FL-1 layers and Camellia-256 without FL/FL-1 layers to date.
引用
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页码：16 / +
页数：4
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