LBlock算法的相关密钥不可能飞来去器分析
发布时间：2018-09-05 19:51
【摘要】：研究了相关密钥不可能飞来去器分析方法及轻量级分组密码算法LBlock在该分析方法下的安全性。将不可能飞来去器分析方法和相关密钥分析方法相结合,针对22轮LBlock给出了新的攻击。构造了15轮的相关密钥不可能飞来去器区分器,通过向前扩展3轮,向后扩展4轮,成功攻击了22轮LBlock。该攻击的数据复杂度仅为2~(51.3)个明文,计算复杂度为2~(71.54)次22轮加密。与已有结果相比,攻击的数据复杂度和计算复杂度均有明显下降。
[Abstract]:This paper studies the method of correlative key impossible flier analysis and the security of lightweight block cipher algorithm LBlock under this method.Combining impossible flier analysis with correlative key analysis,a new attack against 22 rounds of LBlock is proposed.Fifteen rounds of correlative key impossible flier-flop discriminator are constructed. After 3 rounds of forward extension and 4 rounds of backward extension, 22 rounds of LBlock are successfully attacked. The data complexity of the attack is only 2 ~ (51.3) plaintext, and the computational complexity is 2 ~ (71.54) rounds of 22 encryption rounds.
【作者单位】： 西安电子科技大学综合业务网理论及关键技术国家重点实验室;
【基金】：国家自然科学基金资助项目(No.61373170,No.U0835004,No.U1536202) 国家111创新引智基金资助项目(No.B08038)~~
【分类号】：TN918.1
本文编号：2225296
[Abstract]:This paper studies the method of correlative key impossible flier analysis and the security of lightweight block cipher algorithm LBlock under this method.Combining impossible flier analysis with correlative key analysis,a new attack against 22 rounds of LBlock is proposed.Fifteen rounds of correlative key impossible flier-flop discriminator are constructed. After 3 rounds of forward extension and 4 rounds of backward extension, 22 rounds of LBlock are successfully attacked. The data complexity of the attack is only 2 ~ (51.3) plaintext, and the computational complexity is 2 ~ (71.54) rounds of 22 encryption rounds.
【作者单位】： 西安电子科技大学综合业务网理论及关键技术国家重点实验室;
【基金】：国家自然科学基金资助项目(No.61373170,No.U0835004,No.U1536202) 国家111创新引智基金资助项目(No.B08038)~~
【分类号】：TN918.1
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1 卫宏儒;殷广丽;;LBlock算法的相关密钥不可能差分分析[J];计算机研究与发展;2014年07期
2 ;[J];;年期
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