Integral Attack on Reduced-Round LEA Cipher

被引：0
|
作者：
Li H. [1 ,2 ]
Ren J.-J. [1 ,2 ]
Chen S.-Z. [1 ,2 ]
机构：
[1] Information Engineering University, Zhengzhou, 450001, Henan
[2] State Key Laboratory of Mathematical Engineering and Advanced Computing, Zhengzhou, 450001, Henan
来源：
| 1600年 / Chinese Institute of Electronics卷 / 48期
关键词：
Integral attack; LEA; Lightweight block cipher; Zero-correlation distinguisher;
D O I：
10.3969/j.issn.0372-2112.2020.01.003
中图分类号：
学科分类号：
摘要：
LEA cipher, a family of ARX lightweight block cipher, is widely used in resource-constrained environments. In this paper, we use the miss-in-the-middle technique to find 86 8-round zero-correlation distinguishers and 6 9-round zero-correlation distinguishers of LEA, and make use of the relationship between the zero-correlation distinguisher and the integral distinguisher to construct 5 8-round distinguishers and 1 9-round integral distinguishers. Based on 8-round integral distinguisher, integral attack on 10-round LEA-128 is implemented firstly by using the property of the key schedule and partial-sum technology, and the attack performs 2120 10-round LEA-128 encryptions. Besides, the integral attack against 11-round LEA-192 with computational complexity of 2185.02 11-round LEA-192 encryptions and the integral attack against 11-round LEA-256 with computational complexity of 2248 11-round LEA-256 encryptions are implemented. © 2020, Chinese Institute of Electronics. All right reserved.
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页码：17 / 27
页数：10
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