混沌键控视频加密方案研究

发布时间：2018-04-20 00:13

本文选题：混沌键控 + 视频加密　；参考：《重庆邮电大学学报(自然科学版)》2017年01期

【摘要】：针对流式加密阻碍加密系统并行化的实现,以及混沌序列随机特性不强等问题,提出基于混沌键控的视频加密方案。该方案选用三维洛伦兹系统、四维陈系统和四维细胞神经网络系统作为备选密钥源,由明文视频帧本身来决定密钥源系统及其初始条件,并对生成的混沌序列进行优化和映射,以提高其随机序列特性。最后遵循扩散和混淆的原则,对视频信息进行加密。每一个像素的加密值均与明文视频帧、加密密钥和前两个像素的加密值相关。该加密方案可采用多通道同时对视频信息进行加解密,平衡了密钥空间和加密效率的关系,可满足视频加密的实时性要求;密钥敏感性和明文敏感性强;统计特性完全被打破;具有良好的抗噪性。可有效地抵抗密码分析攻击,安全性高,实用性强。
[Abstract]:A video encryption scheme based on chaotic keying is proposed to solve the problem that streaming encryption hinders the implementation of parallelization of encryption system and the randomness of chaotic sequences is not strong. In this scheme, three dimensional Lorenz system, four dimensional Chen system and four dimensional cellular neural network system are selected as alternative key sources. The key source system and its initial conditions are determined by the clear text video frame itself, and the chaotic sequences are optimized and mapped. In order to improve its random sequence characteristics. Finally, following the principle of diffusion and confusion, the video information is encrypted. The encryption value of each pixel is related to the plaintext video frame, the encryption key and the encryption value of the first two pixels. The encryption scheme can encrypt and decrypt the video information at the same time, balance the relationship between the key space and the encryption efficiency, meet the real-time requirements of video encryption, have strong key sensitivity and clear text sensitivity, and break the statistical characteristics completely. It has good noise resistance. It can resist the attack of cryptographic analysis effectively and has high security and practicability.
【作者单位】：信阳农林学院信息工程学院;
【基金】：河南省教育厅高等学校重点科研项目(15A520095)~~
【分类号】：TN918.4

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