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。
Abstract：The new lightweight block cipher ESF is applied in the Internet of Things to provide secu- rity 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 ll-round ESF, which is based on the 8-round im- possible differential. It concludes that the full 32-round ESF has enough security immunity against the attack.
出处
《计算机工程与科学》
CSCD
北大核心
2013年第9期89-93,共5页
Computer Engineering & Science
基金
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)
