Practically Secure against Differential Cryptanalysis for Block Cipher SMS4

摘要：

SMS4 is a 128-bit block cipher with a 128-bit user key and 32 rounds,which is used in the Chinese National Standard for Wireless LAN WAPI. This paper studies the practical security of SMS4 against differential attack which is evaluated by upper bounds of maximum differential characteristic probability (MLCP). We design a method to calculate the lower bounds on the number of active S-Boxes in some consecutive rounds of SMS4. The results show that SMS4 is practically secure against differential cryptanalysis.

关键词： SMS4 active S-Boxes MLCP differential pattern differential characteristic practically secure

作者: Zhang MeiLing Liu YuanHua Liu JingMei

作者单位: School of Communication and Information Engineering,Xian University of Post and Telecommunications, National Key Lab. of Integrated Service Networks,Xidian University Xian,China State Key Laboratory

会议类型: 国际会议

会议名称: 2011 International Conference on Opto-Electronics Engineering and Information Science(2011光电电子工程与信息科学国际会议 ICOEIS 2011)

会议地点: 西安

会议语种:英文

页码: 1923-1928

在线出版日期: 2011-12-23（万方平台首次上网日期，不代表论文的发表时间）