Nowadays, advances in technology have led to the expansion of the use and exchange of digital data, which places great importance on the security of these data. The protection of exchanging messages, passwords of email accounts, bank accounts and many others requires the security of textual data. Likewise, the security of medical images, personal images, captures from military satellites, plans to build banks and many others require the protection of digital images. Thereby, jointly based on the special randomness generated by a chaotic Jerk system with hump structure and DNA coding, a cryptosystem is proposed in this article for both text and image encryption. A preliminary study on the dynamic properties of a Jerk system as well as DNA coding is carried out, respectively, for the exploration of the phenomena and the implementation of the encryption technique. Through standard nonlinear analysis tools, the full dynamics of the system is explored and feasibility is confirmed through PSpice investigations. The simulated experimental results, as well as the security analysis, show quantitatively and qualitatively that the proposed encryption technique does not only offer better performance in comparison with some existing algorithms but is also sufficiently fast for practical applications while resisting the known attacks but also.

如今，技术的进步导致数字数据的使用和交换不断扩展，这对这些数据的安全性至关重要。为了保护消息交换，电子邮件帐户的密码，银行帐户和许多其他帐户的安全，需要文本数据的安全性。同样，医学图像，个人图像，从军事卫星捕获的图像，建立银行的计划以及许多其他方面的安全性也要求对数字图像进行保护。因此，本文结合具有驼峰结构和DNA编码的混沌Jerk系统产生的特殊随机性，在本文中提出了一种用于文本和图像加密的密码系统。分别对Jerk系统的动力学特性以及DNA编码进行了初步研究，用于现象的探索和加密技术的实现。通过标准的非线性分析工具，探索了系统的全部动力学特性，并通过PSpice调查确定了可行性。仿真实验结果以及安全性分析从数量和质量上都表明，所提出的加密技术不仅与某些现有算法相比具有更好的性能，而且在抵抗已知攻击的同时，对于实际应用也足够快。