• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2013, Vol. 35 ›› Issue (9): 89-93.

• 论文 • 上一篇    下一篇

轻量级分组密码算法ESF的不可能差分分析

刘宣,刘枫,孟帅   

  1. (山东师范大学信息科学与工程学院,山东 济南 250014)
  • 收稿日期:2013-05-01 修回日期:2013-07-28 出版日期:2013-09-25 发布日期:2013-09-25
  • 基金资助:

    国家自然科学基金资助项目(61272434);山东省自然科学基金资助项目(ZR2012FM004);信息安全国家重点实验室开放基金资助项目(4050101)

Impossible differential cryptanalysis
of lightweight block cipher ESF          

LIU Xuan,LIU Feng,MENG Shuai   

  1. (School of Information Science and Engineering,Shandong Normal University,Jinan 250014,China)
  • Received:2013-05-01 Revised:2013-07-28 Online:2013-09-25 Published:2013-09-25

摘要:

新的轻量级密码算法ESF用于物联网环境下保护RFID标签以及智能卡等设备的通信安全。ESF算法是一种具有广义Feistel结构的32轮迭代型分组密码,轮函数是SPN结构。分组长度为64比特,密钥长度为80比特。通过不可能差分分析方法来寻找ESF算法的不可能差分特征,给出ESF算法8轮不可能差分区分器来攻击11轮ESF算法。实验结果表明,ESF对不可能差分密码分析有足够的安全免疫力。

关键词: 分组密码, 轻量级, 不可能差分, 分析, 八阵图算法

Abstract:

The new lightweight block cipher ESF is applied in the Internet of Things to provide security for RFID tags and smart cards. ESF algorithm has a 32round generalized Feistel structure, and its round function employs SPnetwork structure. The block size of ESF is 64bit and the key size is 80bit. We search for the impossible differential feature of ESF using the impossible differential cryptanalysis, and present an impossible differential cryptanalysis on 11round ESF, which is based on the 8round impossible differential. It concludes that the full 32round ESF has enough security immunity against the attack.

Key words: block cipher;lightweight;impossible differential;cryptanalysis;ESF