some new observations on the sms4 block cipher in the chinese wapi     standard

ISCAS OpenIR > 信息安全国家重点实验室

	some new observations on the sms4 block cipher in the chinese wapi standard
	Zhang Wentao; Wu Wenling; Feng Dengguo; Su Bozhan
	2009
会议名称	5th International Conference on Information Security Practice and Experience
会议录名称	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
页码	324-335
会议日期	APR 13-15,
会议地点	Xi an, PEOPLES R CHINA
收录类别	istp,ei,acm
出版地	HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
出版者	INFORMATION SECURITY PRACTICE AND EXPERIENCE, PROCEEDINGS - 5TH INTERNATIONAL CONFERENCE, ISPEC 2009
ISSN	0302-9743
ISBN	978-3-642-00842-9
部门归属	Zhang, Wentao; Wu, Wenling; Feng, Dengguo; Su, Bozhan Chinese Acad Sci, Inst Software, State Key Lab Informat Secur, Beijing 100190, Peoples R China.
摘要	SMS4 is a 128-bit block cipher used in the WAPI standard in wireless networks in China. The cipher has attracted much attention in the past two years. This paper consists of two parts. The first part is on the design of the linear diffusion layer L of SMS4. Some new observations on L are present, which open out the design rationales of L and such class functions to a great extent. The second part is on the differential attack against SMS4. A class of 18-round differential characteristics with a higher probability is given. Then a simple differential attack on 22-round SMS4 is present, which is an improvement of the previous work, thus our attack becomes the best known one on SMS4. Furthermore, we make a remark on the construction of differential characteristics of SMS4.
关键词	Wapi Block Cipher Sms4 Diffusion Transformation Differential Cryptanalysis
主办者	Xidian Univ, Xidian Univ, Sch Telecommun Engn, Key Lab Comp Networks & Informat Security, Minist Educ
语种	英语
内容类型	会议论文
URI标识	http://ir.iscas.ac.cn/handle/311060/8386
专题	信息安全国家重点实验室
推荐引用方式 GB/T 7714	Zhang Wentao,Wu Wenling,Feng Dengguo,et al. some new observations on the sms4 block cipher in the chinese wapi standard[C]. HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY:INFORMATION SECURITY PRACTICE AND EXPERIENCE, PROCEEDINGS - 5TH INTERNATIONAL CONFERENCE, ISPEC 2009,2009:324-335.