| 流密码Salsa20的差分研究 |
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| 引用本文： | 李申华,郑世慧,宋春燕. 流密码Salsa20的差分研究[J]. 计算机工程与应用, 2008, 44(1): 5-7. DOI: 10.3778/j.issn.1002-8331.2008.01.002 |
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| 作者姓名： | 李申华 郑世慧 宋春燕 |
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| 作者单位： | 山东大学,密码技术与信息安全教育部重点实验室,济南,250100;北京邮电大学,信息安全中心,北京,100876;中国海洋大学,信息科学与工程学院,计算机科学系,山东,青岛,266100 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) , 国家自然科学基金 , 国家自然科学基金 |
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| 摘 要： | ECRYPT是欧洲启动的一个为期4年的信息安全项目，它征集了Salsa20，HC256，LEX等34个候选算法。对其中的热门候选算法Salsa20的差分进行了研究，首先给出了有关Salsa20算法中的quarterround函数4个高概率差分，然后分析了Salsa20轮变换的差分分布情况，并给出了一个概率为2-50的4轮差分路线，最后得出了三个有关Salsa20差分攻击的结论。
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| 关 键 词： | Salsa20 流密码 ECRYPT 差分 |
| 文章编号： | 1002-8331（2008）01-0005-03 |
| 收稿时间： | 2007-09-01 |
| 修稿时间： | 2007-09-01 |
Research on differential of Salsa20 |
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| LI Shen-hua,ZHENG Shi-hui,SONG Chun-yan. Research on differential of Salsa20[J]. Computer Engineering and Applications, 2008, 44(1): 5-7. DOI: 10.3778/j.issn.1002-8331.2008.01.002 |
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| Authors: | LI Shen-hua ZHENG Shi-hui SONG Chun-yan |
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| Affiliation: | 1.Laboratory of Cryptographic Technology and Information Security，Shandong University，Ji’nan 250100，China 2.Information Security Center，University of Posts and Telecommunications，Beijing 100876，China 3.College of Information Science and Engineering，Ocean University of China，Qingdao，Shandong 266100，China |
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| Abstract: | ECRYPT is a four years information security project which was launched by Europe after NESSIE.34 ciphers have been collected as the candidates to ECRYPT Stream Cipher Project,which include Salsa20,HC256,LEX and so on.This paper researches on the differential of Salsa20.We gived four properties which are the differential of quarterround function with high probability,analyzed the differential of round function and gave a differential of 4 rounds with the probability 2-50.In addition,we gave three conclusions about the attack to Salsa20. |
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| Keywords: | Salsa20 stream cipher ECRYPT differential |
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