摘要
为了使密码算法兼具Feistel型和SP型密码算法的优点,提出了一种构造交换环上m维线性空间的对等非线性变换的方法,并依此设计了基于对等变换的类Feistel密码模型和一种新的分组加密模型。新的加密模型既有Feistel模型的对称性,又有SP网络模型扩散速度快的优点。同时,该模型具有相当大的灵活度,通过选取不同的环,参数a、b以及非线性函数f(x)可以演变出多种分组密码算法。因此,该模型具有较广的应用前景。
A method was proposed to construct nonlinear involutory transformation on m dimensional linear space in commutative ring,and a block cipher model based on involutory transformation was designed.The new encryption model not only has the symmetry of Feistel model,but also the fast spread speed of SP network model.Moreover,this model has lots of flexibility and can evolve a variety of block ciphers easily through choosing different ring,parameters a and b,or nonlinear function f(x).So,it has wide application prospects.
出处
《解放军理工大学学报(自然科学版)》
EI
北大核心
2013年第4期355-359,共5页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
河北省自然科学基金数学研究专项资助项目(08M009)