Improving the security and efficiency of block ciphers based on LS-designs

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• 作者：Anthony Journault ; François-Xavier Standaert…
• 关键词：Block cipher ; Physical security ; Side channel analysis ; Design
• 刊名：Designs, Codes and Cryptography
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：82
• 期：1-2
• 页码：495-509
• 全文大小：
• 刊物类别：Mathematics and Statistics
• 刊物主题：Combinatorics; Coding and Information Theory; Data Structures, Cryptology and Information Theory; Data Encryption; Discrete Mathematics in Computer Science; Information and Communication, Circuits;
• 出版者：Springer US
• ISSN：1573-7586
• 卷排序：82

文摘

LS-designs are a family of bitslice ciphers aiming at efficient masked implementations against side-channel analysis. This paper discusses their security against invariant subspace attacks, and describes an alternative family of eXtended LS-designs (XLS-designs), that enables additional options to prevent such attacks. LS- and XLS-designs provide a large family of ciphers from which efficient implementations can be obtained, possibly enhanced with countermeasures against physical attacks. We argue that they are interesting primitives in order to discuss the general question of “how simple can block ciphers be?”.