In this work, we have proposed an audio encryption method. The proposed method is audio signal sensitive as the hash value of the given signal is computed using SHA3-512, which returns a significantly large key of size 512-bit. This key is used to set the different parameters. This work suggests a 2D Cosine Logistic Map (2DCLM) by fusing the Cosine map with the Logistic map. The proposed 2DCLM functions well under chaos. The given audio signal is scrambled with the help of the hash value. The scrambled signal is decomposed by Empirical Mode Decomposition (EMD); before using the EMD the signal is segmented into a 2D signal to reduce the time complexity of the EMD method. The residuals given by EMD and the stream generated by 2DCLM are XOR-ed to encrypt the signal. Finally, the 2D encrypted signal is transformed into a 1D encrypted audio signal. The efficacy of the present method is evaluated with the help of different audio streams. The findings of the simulation and comparison indicate that the suggested technique may deliver effective encryption results while thwarting cryptographic assaults.

中文翻译：

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一种基于经验模态分解和二维余弦Logistic映射的音频加密方案

在这项工作中，我们提出了一种音频加密方法。所提出的方法对音频信号敏感，因为给定信号的哈希值是使用 SHA3-512 计算的，它返回大小为 512 位的非常大的密钥。该键用于设置不同的参数。这项工作通过将余弦图与逻辑图融合来提出二维余弦逻辑图（2DCLM）。所提出的 2DCLM 在混沌条件下运行良好。给定的音频信号在哈希值的帮助下被加扰。加扰信号通过经验模态分解（EMD）进行分解；在使用 EMD 之前，将信号分割为 2D 信号，以降低 EMD 方法的时间复杂度。EMD 给出的残差和 2DCLM 生成的流进行异或以加密信号。最后，将2D加密信号转换为1D加密音频信号。借助不同的音频流来评估本方法的功效。模拟和比较的结果表明，所建议的技术可以提供有效的加密结果，同时阻止加密攻击。