通过加密实现私有数据的授权访问是一项很重要的技术。如今,密码学意义上安全的DES,RSA加密标准得到了广泛应用。Baptista提出的混沌加密是密码学史上新的发展方向,它继承了混沌系统的重要特性,比如对初始值极度敏感。在描述混沌系统的理论基础上提出了混沌保密系统的一种结构,并使用蔡氏电路实现了文本、图片的保密通信。 Encrypted access to private data is an important technique. Today, cryptographically secure DES, RSA encryption standards are widely used. Baptista proposed chaotic encryption is a new development in the history of cryptography, which inherits the important characteristics of chaotic systems, such as the extreme sensitivity of the initial value. Based on the theory of describing chaos system, a structure of chaos security system is proposed. The use of Chua ’s circuit to realize the secure communication of texts and pictures.