项目名称: Lai-Massey分组密码模型的安全性研究
项目编号: No.61272488
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 自动化技术、计算机技术
项目作者: 金晨辉
作者单位: 中国人民解放军信息工程大学
项目金额: 80万元
中文摘要: Lai-Massey结构是对IDEA算法改进后所提出的一类分组密码的轮函数结构,随后用于FOX(又称IDEA NXT)系列算法的设计,该模型具有扩散速度快的显著特点。目前,对Lai-Massey结构的伪随机性已有若干结果,对FOX系列算法的安全性评估也取得长足进展,但对Lai-Massey结构这个一般模型却鲜有安全性评估方面的结果。本课题拟针对Lai-Massey结构,在其伪随机性、超伪随机性及其与随机置换的区分优势等方面取得更加深入的结果,并从抵抗差分分析、线性分析、不可能差分分析、高阶差分分析以及积分分析等密码攻击方法的能力,从而系统地给出Lai-Massey结构的安全性评估结果,并据此研究Lai-Massey结构中的密码变换的设计要求和设计方法等问题。
中文关键词: 密码学;分组密码;密码模型;密码分析;可证安全性
英文摘要: The Lai-Massey scheme was derived from the modification of IDEA,which have a outstanding characteristics of quick-diffusion , and was later adopted in the design of FOX(IDEA NXT) family. By now,there has some results about the pseudorandom of Lai-Massey scheme, and have made some great advances in the security analysis of FOX family,and there are limited results on Lai-Massey scheme.. This issue shall work for more deeply results on the Lai-Massey scheme for its pseudorandom properties,super pseudorandom properties and the advantage of distinguish vs random permutation. Also, we will evaluate the resistences of Lai-Massey scheme against the differential cryptanalysis, linear cryptanalysis, impossible differential cryptanalysis,high order defferential cryptanalysis and the intergal cryptanalysis. By this way, we evaluate the overall security of the Lai-Massey scheme. Finally, based on the results mentioned above, we will provide the basic designs rules and methods for the cryptographic transformations in Lai-Massey scheme.
英文关键词: Cryptography;Block Cipher;Cipher Structure;Cryptanalysis;Provable security