高次MFE多变量加密方案

High-order MFE Multivariable Encryption Scheme

对改进的Medium-Field型多变量加密方案进行了分析,其所定义的运算致使该方案不能成功解密,进而,该方案实质并不可行。针对原Medium-Field型多变量公钥加密体制不能抵抗SOLE攻击,提出一种新的有效的改进方案。通过重新设计原方案的中心映射,使攻击者不能得到相关的线性化方程,从而抵抗SOLE攻击。分析表明新方案不仅能够抵御SOLE攻击,而且能抵制秩攻击和Grb ner基攻击,是一种更为安全的多变量公钥加密方案。

The enhanced Medium-Field multivariable encryption scheme was analyzed,and the result showed that the operation in that scheme leads to failure in decryption process and this scheme is in fact invalid.An efficient improved Medium-Field scheme was presented to avoid the attack of SOLE(Second Order Linearization Equation).The central map of original Medium-Field scheme was redesigned and related linear equations can not be calculated by attacker,then the new variant can avoid SOLE attack.Analyses showed that ...