高次MFE多变量加密方案  

High-order MFE Multivariable Encryption Scheme

作　　者：王鑫[1] 张美玲[1] 王新梅[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071

出　　处：《四川大学学报（工程科学版）》2009年第4期171-175,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(90604009;60503010);陕西省教育厅科研计划资助项目(08JK432)

摘　　要：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 ...

关 键 词：密码学分析 公钥密码 多变量 线性化方程 Medium-Field 

分 类 号：TN918.1[电子电信—通信与信息系统]