摘要
本文针对数字彩色图像的存储特性设计了一种新的加密算法,该算法属于对称密钥加密算法,采用两种一维的混沌映射与一种经典的耦合混沌映射相混合,在可接受的加密速度内实现对数字彩色图像进行高安全性的加密。本文对该算法的细节进行详细介绍,包括该算法的安全性分析与可执行性。仿真结果表明,采用本文设计的加密算法加密的数字彩色图像具有极高的安全性、密钥空间大的优点。并且加密得到的密文与明文具有同样的大小,这保证了该加密算法还适合应用于互联网上的实时安全保密通信。
In this paper, a digital color image encryption scheme based on the mixture of chaotic systems is designed. The chaotic cryptography technique used in this paper is a symmetric key cryptography. In this algorithm, two typical coupled chaotic maps were mixed with a one-dimensional chaotic map and used for high degree security color image encryption while its speed is acceptable. The.proposed algorithm is described in detail, along with its security analysis and implementation. The experimental results based on mixture of chaotic maps approves the effectiveness of the proposed method and the implementation of the algorithm. This mixture application of chaotic maps shows advantages of large key space and high-level security. The cipher text generated by this method is the same size as the plaintext and is suitable for practical use in the secure transmission of confidential information over the Internet.
出处
《微计算机信息》
2010年第21期49-50,72,共3页
Control & Automation
关键词
耦合混沌映射
彩色图像加密
混沌加密系统
coupled chaotic map
color image encryption
chaotic encryption systems
