计算机工程Issue(3)：28-32,45,6.DOI:10.3969/j.issn.1000-3428.2014.03.006
简化轮LBlock的密钥中比特检测及分析
Detection and Analysis of Key Neutral-bit for Reduced Round LBlock
摘要
Abstract
Recently, LBlock as a new lightweight block cipher is presented. By using both the structure of LBlock algorithm and the basic idea from the cube test, two neutral-bit detection algorithms are proposed. It is shown that all master key bits are involved in the each output of 9-round reduced LBlock cipher. Moreover, for given 18 cube variables, there still is nonexistence of key neutral-bit for 11-round reduced LBlock cipher. Research result shows that the full-round LBlock cipher has good key bits confusion against the classical cube attacks.关键词
轻量级密码/分组密码/密钥中比特/立方测试/S盒/LBlock密码Key words
lightweight cipher/block cipher/key neutral-bit/cube test/S box/LBlock cipher分类
信息技术与安全科学引用本文复制引用
莫钊,韦永壮..简化轮LBlock的密钥中比特检测及分析[J].计算机工程,2014,(3):28-32,45,6.基金项目
国家自然科学基金资助项目(61100185)；广西自然科学基金青年基金资助项目(2011GXNSFB018071)；广西无线宽带通信与信号处理重点实验室(桂林电子科技大学)主任基金资助项目(11101)。 （61100185）
