基于混沌和小波变换的音频加密算法
发布时间：2018-07-21 09:54
【摘要】：为使音频信息可以在信道中安全传输,提出了一种在MPEG压缩的背景下基于混沌和小波变换的音频加密算法。首先对信号采用随机矩阵进行扩充来改变原信号的幅值,其次在"时域-小波域-时域"利用Logistic混沌映射进行3次音频信号置乱和扩散加密操作,最终得到加密信号。通过分段Logistic映射生成密钥的随机矩阵。理论分析发现,所提算法的密钥空间明显增大。实验结果表明,得到的音频加密信号的直方图分布更均匀,信号间的相关度变小,密钥敏感度增强。因此,提出的音频加密算法具有较高的安全性。
[Abstract]:In order to make audio information transmit safely in the channel, an audio encryption algorithm based on chaos and wavelet transform in the background of MPEG compression is proposed. First, the signal is extended to change the amplitude of the original signal by using random matrix. Secondly, 3 audio signal scrambling is made by using Logistic chaotic map in the time domain - wavelet domain - time domain. And the encrypted operation, the encryption signal is finally obtained. The random matrix of the key is generated by the piecewise Logistic mapping. The theoretical analysis shows that the key space of the proposed algorithm is obviously increased. The experimental results show that the histogram distribution of the audio encryption signal is more uniform, the correlation between the signals is smaller and the key sensitivity is enhanced. Therefore, the key sensitivity is enhanced. Therefore, the proposed key sensitivity is enhanced. The audio encryption algorithm has high security.
【作者单位】： 西安邮电大学通信与信息工程学院;
【基金】：国家自然科学基金资助项目(61671377,61472472) 陕西省自然科学基础研究计划资助项目(2015JQ6262) 陕西省教育厅专项科研计划资助项目(15JK1669)资助
【分类号】：TN918.4
[Abstract]:In order to make audio information transmit safely in the channel, an audio encryption algorithm based on chaos and wavelet transform in the background of MPEG compression is proposed. First, the signal is extended to change the amplitude of the original signal by using random matrix. Secondly, 3 audio signal scrambling is made by using Logistic chaotic map in the time domain - wavelet domain - time domain. And the encrypted operation, the encryption signal is finally obtained. The random matrix of the key is generated by the piecewise Logistic mapping. The theoretical analysis shows that the key space of the proposed algorithm is obviously increased. The experimental results show that the histogram distribution of the audio encryption signal is more uniform, the correlation between the signals is smaller and the key sensitivity is enhanced. Therefore, the key sensitivity is enhanced. Therefore, the proposed key sensitivity is enhanced. The audio encryption algorithm has high security.
【作者单位】： 西安邮电大学通信与信息工程学院;
【基金】：国家自然科学基金资助项目(61671377,61472472) 陕西省自然科学基础研究计划资助项目(2015JQ6262) 陕西省教育厅专项科研计划资助项目(15JK1669)资助
【分类号】：TN918.4
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