离散非线性混沌映射的安全通信协议外文翻译.docVIP

外文翻译 课题名称：超混沌序列的应用与性能分析 学院（系）：信息科学与工程学院 年级专业：电子信息工程 学生姓名：熊矿箭 指导教师：田澈 完成日期：12-06-10 Secure communication protocols with discrete nonlinear chaotic maps Abstract： The discrete nonlinear chaotic maps (DNCMs) exploit a novel approach to encryption: the information is injected to a properly designed DNCM system and affect its dynamics. The evolution of a proper variable of this system composes the transmitted cipher text. Consequently, this variable controls the dynamics of another DNCM system that acts as the decipher. The paper proposes two new secure communications protocols that utilise the peculiarities of the DNCM systems. At the first one, the DNCM systems are used to construct a unique authentication scheme. With the second protocol the participants instead of exchanging the symmetric key (encrypted with the public key) exchange the encryption components themselves. This protocol is well suited to the possibility for dynamic ``randomized construction of DNCM systems. Therefore, a new dimension to security is added: not only the symmetric encryption key of a communication session is randomized but also the encryption algorithm itself is generated randomly (subject to some design rules). All rights reserved. Keywords: Chaos; Nonlinearity; Chaotic synchronization; Encryption; Authentication; Software components 1. Introduction Recently, discrete nonlinear chaotic maps (DNCMs) have been proposed as a means to implement secure communication systems. The DNCM encryption algorithms operate by restricting the system parameters in ranges that guarantee geometric convergence of all the variables of the receiving system to those of the transmitting one, under the influence of a common transmitted variable (called the drive signal). This process has only a few features in common with the chaotic synchronization process studied extensively for flows (i.e., systems of differential equatio