%0 Journal Article
%T 基于Lai Massey变体结构的可调分组密码的设计与分析<br>Design and analysis of the tweakable block ciphers based on the transformation of lai massey structure
%A 赵伟
%A 汤殿华
%J 四川大学学报 (自然科学版)
%D 2015
%X Lai Massey结构(L M结构)是分组密码中一类重要的整体结构, 任意轮的L M结构都不具备伪随机性. Vaudenay通过对L M结构做一个简单变换, 使得3轮L M变体结构具备伪随机性, 并在FOX分组密码的设计中采用此变体结构. 该文针对基于L M变体结构来设计可调分组密码进行了研究. 通过在L M变体结构的不同位置异或可调因子（tweak）, 分析了3轮基于L M变体结构设计可调分组密码的可行性. 对3轮结构提出了攻击的方法.<br>Lai Massey(L M) is one of the most important structures used in block ciphers. But it’s not pseudorandom with any given rounds. By a simple transform, S.Vaudenay got the transformation of L M scheme, which is preudorandom and used in FOX. This paper researched the design of tweakable blockciphers based on the transformation of L M structure. The feasibility to design block ciphers by XORing a tweak value into different places in the dataflow of the 3 round L M transformation was analyzed. The attack methods for 3 round transformation were given
%K 分组密码 可调分组密码 Lai Massey结构 伪随机性&lt
%K br&gt
%K Block Cipher Tweakable block ciphers Lai Massey structure Pseudorandomness
%U http://science.ijournals.cn/jsunature_cn/ch/reader/view_abstract.aspx?file_no=20153018&flag=1