混沌壳保护多变量加解密体制
首发时间:2015-09-15
摘要:基于多变量理论的密码体制由于采用了减模式导致多项式方程组为不定方程组,只能作为公钥密码体制用于签名而不能用于加解密。针对此问题,提出中心映射使用恰定方程组的多变量加密体制,利用仿射变换扰乱中心映射的结构,通过对二维混沌系统的输出在有限域上离散化后对多变量密码体制的中心映射和仿射变换进行加壳保护,弥补恰定方程组的缺陷,破坏了各种针对多变量密码体制的攻击方法的先决条件。针对常见攻击和密钥安全性的分析证实经混沌壳保护后多变量密码体制可以抵抗常见攻击。
For information in English, please click here
Multivariate symmetric cryptosystem based on chaotic shell protection
Abstract:Multivariate public key cryptosystems using minus perturbation method act as a signature system instead of encryption system since the multivariate equations in this system are indeterminate equations. In this paper, an encryption system based on multivariate theory is proposed. The central map in the proposed system is invertible and is mingled by an affine map. To offset the flaws in multivariate equations, a two dimension chaotic system is discretized and perturbs the inputs and outputs of the multivariate cryptosystem. As a result, the prerequisites of known attacks for multivariate system do not come into existence anymore. The analysis show the proposed system is able to resist known attacks
Keywords: multivariate cryptography perturbation chaos
论文图表:
引用
No.4654178109135514****
同行评议
共计0人参与
勘误表
混沌壳保护多变量加解密体制
评论
全部评论0/1000