SAFER-64的弱密钥

Weak keys of SAFER-64

通过对SARER-64系统基础模块的深入分析,构建了由6个线性逼近式组成的循环逼近式系统.由于循环性,该逼近式系统可以用来对任意轮次的SARER-64进行多重线性密码分析,从而确定系统的弱密钥.现以五轮SARER-64为例,构建多重线性逼近式并分析系统的弱密钥.

This paper analyzes the basic modules of SAFER-64 and presents the circulating relations of linear cryptanalysis composed of 6 linear approximations. By the circulating relations, the multiple linear eryptanalysis can be used to determine weak key classes of arbitrate round of SAFER-64. The multiple linear approximations are presented to identify weak key classes of 5 rounds of SAFER-64 in an example.