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对简化版LBLock算法的相关密钥不可能差分攻击 被引量:14

Related-key Impossible Differential Attack on Reduced Round LBlock
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摘要 LBLOCK是吴文玲等人于2011年设计的一种轻量级密码算法。该文利用一个特殊的相关密钥差分特征,对19轮的LBlock算法进行了相关密钥不可能差分攻击,攻击的计算复杂度为70.0O(2),所需要的数据量为264。进一步,提出了一种针对21轮LBlock的相关密钥不可能差分攻击,计算复杂度为71.5O(2),数据量为263。 LBlock is a lightweight block cipher designed by Wu Wen-ling et al. in 2011. In this paper, a specific related-key differential is uesd to attack 19-round LBlock. The attack finds all the 80 bit keys in 0(270.0) 19-round encryptions.The data complexity is 264 chosen plaintexts. Further more, a related-key impossible differential attack to 21-round Lblock is proposed. With 263 chosen plaintexts, the computing complexity of the attack is about 0(2715) 21-round encryptions for obtaining key.
出处 《电子与信息学报》 EI CSCD 北大核心 2012年第9期2161-2166,共6页 Journal of Electronics & Information Technology
基金 通信保密重点实验室基金(9140C110202110C1101) 全军军事学研究生课题基金(2010JY0263-149)资助课题
关键词 密码分析 LBlock算法 相关密钥攻击 不可能差分 Cryptanalysis LBlock cipher Related-key attack Impossible differential
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参考文献10

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同被引文献116

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  • 2李梦东.《密码学》课程设置与教学方法探究[J].北京电子科技学院学报,2007,15(3):61-66. 被引量:33
  • 3刘晓星,胡畅霞,刘明生.安全加密算法DES的分析与改进[J].微计算机信息,2006,22(04X):32-33. 被引量:40
  • 4陈杰,张跃宇,胡予濮.一种新的6轮AES不可能差分密码分析方法[J].西安电子科技大学学报,2006,33(4):598-601. 被引量:7
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