SAFER系列密码算法的设计与分析

Design and Analysis of SAFER Block Cipher

SAFER系列密码算法的总体结构采用SP 网络,它的设计具有其独到的几个特色。分析SAFER系列密码算法的设计思想,沿着设计者对它们不断改进的思路,分别描述其混淆层、扩散层、密钥扩展算法的性质和对它们的攻击。

The general structure of SAFER block ciphers adopts SP network. It's design has some original features. In this paper, the design technique of SAFER block cipher is analyzed. Along the process of improvement of it's designers, we give a description of and attack on their confusion layer, diffusion layer and key schedule algorithm. In the end, some problems about SAFER design are proposed, and will be studied later.