摘要
LEA密码算法是一类ARX型轻量级分组密码,广泛适用于资源严格受限的环境.本文使用中间相错技术找到LEA算法的86条8轮和6条9轮零相关区分器,进一步利用零相关区分器和积分区分器的关系,构造出5条8轮和1条9轮积分区分器.在8轮积分区分器的基础上,利用密钥扩展算法的性质和部分和技术,首次实现了对LEA-128的10轮积分攻击,攻击的计算复杂度为2120次10轮LEA-128加密.进一步,实现了对LEA-192的11轮积分攻击以及对LEA-256的11轮积分攻击,计算复杂度分别为2185.02次11轮LEA-192加密和2248次11轮LEA-256加密.
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.
作者
李航
任炯炯
陈少真
LI Hang;REN Jiong-jiong;CHEN Shao-zhen(Information Engineering University,Zhengzhou,Henan 450001,China;State Key Laboratory of Mathematical Engineering and Advanced Computing,Zhengzhou,Henan 450001,China)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2020年第1期17-27,共11页
Acta Electronica Sinica
基金
数学工程与先进计算国家重点实验室开放基金课题(No.2018A03)
国家密码发展基金(No.MMJJ20180203)
信息保障技术重点实验室开放基金课题(No.KJ-17-002)
