摘要
SFLASH体制是配上具体参数的C*-体制,已被Dubois等用差分攻击方法成功地攻破.文中分析了Dubois等对SFLASH体制所用的攻击方法,说明该攻击能成功的关键主要是依赖于SFLASH体制的对称性,并对C*-体制的对称性进行了研究,严格证明了投影能够破坏C*-体制的对称性.该结果表明,在SFLASH体制上应用投影方法可以有效地抵抗差分攻击.
The SFLASH cryptographic scheme is a C＊-scheme with specific parameters.It has been broken by Dubois et al with differential cryptanalytic attacks.This paper reviews the basic attacks to the SFLASH scheme,and points out that a successful attack mainly depends on the symmetry of the SFLASH scheme.Moreover,the symmetry of the C＊-scheme is investigated,and the fact that projection can break the symmetry of the C＊-scheme is also strictly proved.The results indicate that the SFLASH scheme with projection can effectively withstand diffe-rential attacks.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第5期86-89,共4页
Journal of South China University of Technology(Natural Science Edition)
基金
国家"973"计划项目(2007CB311201)
国家自然科学基金资助项目(60970119
60803149)
关键词
密码
公钥密码
多项式
映射
多变量
对称性
投影
C＊-体制
cryptography
public key cryptography
polynomials
mapping
multivariate
symmetry
projection
C＊-scheme
