Related-key impossible boomerang cryptanalysis on LBlock

被引：0
|
作者：
Xie M. [1 ]
Mu Y.-L. [1 ]
机构：
[1] State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an
来源：
Tongxin Xuebao/Journal on Communications | 2017年 / 38卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Impossible boomerang; LBlock algorithm; Lightweight block cipher; Related-key;
D O I：
10.11959/j.issn.1000-436x.2017101
中图分类号：
学科分类号：
摘要：
The related-key impossible boomerang cryptanalysis and the strength of the lightweight block cipher LBlock against this method were investigated. A new attack on 22-round LBlock was presented combining impossible boomerang attacks with related-key attacks. A 15-round related-key impossible boomerang distinguisher was constructed. Based on the new distinguisher, an attack on 22-round LBlock was mounted successfully by concatenating 3-round to the beginning and 4-round to the end. The attack on 22-round LBlock required data complexity of only 251.3 plaintexts and computational complexity of about 271.54 22-round encryptions. Compared with published cryptanalysis results on 22-round LBlock, proposed attack has great advantages on data and computational complexities. © 2017, Editorial Board of Journal on Communications. All right reserved.
引用
收藏
页码：66 / 71
页数：5
相关论文
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