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首页> 外文期刊>International journal of digital crime and forensics >A Secure Speech Content Authentication Algorithm Based on Discrete Fractional Fourier Transform
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A Secure Speech Content Authentication Algorithm Based on Discrete Fractional Fourier Transform

机译：基于离散分数阶傅里叶变换的安全语音内容认证算法

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摘要

Watermark schemes content-based provide one way to solve the veracity and integrity of speech content. Some existed content-based schemes are vulnerable to feature-analysed substitution attack. Aiming to solve the problems, a secure speech content authentication algorithm is proposed, on the basic of the undeterminate angle of discrete fractional fourier transform. In the paper, the definition and calculation of discrete fractional fourier transform are given. And the watermark generation method based on discrete fractional fourier transform is analyzed Frame number and watermark bits are embedded into hybrid domain of scrambled signals. Compared with the existed watermark schemes, the features for watermark generation and embedding are secret, which improves the security of watermark system. Theoretical analysis and experimental evaluation results show that the proposed algorithm is inaudible, robust to desynchronous attacks and has the excellent ability of tamper detection and tamper location.
机译：基于内容的水印方案提供了一种解决语音内容的准确性和完整性的方法。现有的某些基于内容的方案容易受到功能分析的替换攻击。为了解决这些问题，在离散分数阶傅里叶变换的不确定角度的基础上，提出了一种安全的语音内容认证算法。本文给出了离散分数阶傅里叶变换的定义和计算。并分析了基于离散分数阶傅里叶变换的水印生成方法。将帧号和水印比特嵌入到加扰信号的混合域中。与现有的水印方案相比，水印生成和嵌入的特征是秘密的，从而提高了水印系统的安全性。理论分析和实验评估结果表明，该算法听不清，对异步攻击具有鲁棒性，并且具有出色的篡改检测和篡改定位能力。

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