大规模移动网络通信双混沌数据安全加密算法

Security Encryption Algorithm for Dual Chaotic Data in Large-Scale Mobile Network Communication

摘要

为有效确保网络通信数据的安全性, 以大规模移动网络通信中的图像数据为研究对象, 提出一种双混沌数据安全加密算法。采用新的填充曲线用于大规模移动网络通信图像数据的全局置乱, 通过改进的约瑟夫遍历方法对相邻像素实施比特级置乱, 并引入双向密文反馈实现图像数据的初始加密。将双混沌和Arnold变换有效结合, 利用密钥形成初始状态值, 将其用于控制双混沌系统形成一系列混沌矩阵, 并作为辅助对图像像素进行位置变换和数值改变, 再将图像的各个分量分别实施Arnold变换, 采用设置的置乱-扩散加密算法对水平连接后的图像进行处理, 最后对图像像素实施异或操作(XOR: exclusive OR), 实现大规模移动网络通信双混沌数据安全加密。实验结果表明, 所提算法可以获取满意的加密效果, 同时还具有良好的明文敏感性。

Abstract

In mobile network communication, image data usually needs to be transmitted and shared with multimedia data such as audio and video. Image data often contains personal information, such as photos, videos, etc. In order to ensure the security of network communication data effectively, a double chaotic data encryption algorithm is proposed based on the image data modified in large-scale mobile network communication. A new filling curve is used for global scrambling of image data in large-scale mobile network communication. An improved Joseph ergodic method is used to expand the bit-level scrambling of adjacent pixels, and bidirectional ciphertext feedback is introduced to realize the initial encryption of image data. Double chaos and Arnold transform are effectively combined. The initial state value is formed by using the key, which is used to control the double chaos system to form a series of chaos matrix, the position transformation and value change of image pixels are expanded as an aid, and each component of the image is expanded by Arnold transform. The set scramble-diffusion encryption algorithm is used to process the horizontal connected image, and finally the XOR (exclusive OR) operation is performed on the image pixels to realize the security encryption of double chaos data in large-scale mobile network communication. Experimental results show that the proposed algorithm can obtain satisfactory encryption effect and has good plaintext sensitivity.

关键词

大规模移动网络通信 / 双混沌系统 / 图像数据 / 安全加密 / Arnold变换

Key words

large-scale mobile network communication / double chaotic system / image data / secure encryption / Arnold transformation

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基金资助

广东省重点领域研发计划基金资助项目(2020B0706020010)