基于混沌的高安全性实时数字图像加密技术研究

项目名称： 基于混沌的高安全性实时数字图像加密技术研究

项目编号： No.61271350

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 付冲

作者单位： 东北大学

项目金额： 70万元

中文摘要： 本课题是混沌理论、密码学、信息学、计算机科学与数理统计相结合的交叉性前沿研究，是利用非线性科学理论解决图像信息安全问题的应用理论研究。近年来基于混沌理论的图像加密技术取得了广泛研究并取得了大量理论及应用成果。然而，现有技术在安全性、加密速度、以及与频域压缩编码结合方面仍存在诸多不足，并且目前对图像加密系统的密码学评估体系尚不完善，这些问题严重制约了这一极具潜力技术的发展。本课题拟通过设计有限精度下高质量混沌PRNG、基于复杂多涡卷混沌系统的图像加密系统、具有显著扩散特性的置乱算法、并行图像加密算法、时域加密与频域压缩联合编码算法等一系列改进与创新方案，创建一种高安全性、高效率混沌图像加密系统。与现有技术相比，新方案在密钥流统计特性、密钥空间、抗己知/选择明文攻击，抗统计攻击，抗差分攻击以及加密速度等方面具有诸多优点，可很好的满足宽带网络环境下的大容量图像实时、安全传输需求。

中文关键词： 图像加密；混沌；置乱—扩散；密钥流；

英文摘要： The subject is a cross-cutting-edge research which combines of chaos theory, cryptography, information science, computer science as well as mathematical statistics, and it is applied theoretical studies which utilize nonlinear science to solve the image information security issues. In recent years, chaos-based image encryption technologies are widely investigated and a number of achievements are obtained in both theoretical and application aspect. However, there are still many deficiencies in existing technologies in respect of security, encryption speed as well as joint coding with frequency domain compression. Moreover, the existing cryptography evaluation system for image encryption is not comprehensive. All these problems have seriously restricted the development of the great potential chaos-based imager cipher technology. This project intends to create a chaotic image encryption system with high security and efficiency through proposing a series of improvement and innovation schemes, such as design a high-quality PRNG under finite precision platform, construct an image encryption system based on complex multi-scroll chaotic systems, construct a novel permutation algorithm with significant diffusion properties, construct a high-speed parallel image encryption algorithm as well as construct a chaos-based join

英文关键词： image cipher；chaos；permutation-diffusion；keystream；