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首页> 外文会议>Independent Component Analyses, Wavelets, Unsupervised Smart Sensors, and Neural Networks IV >Multimedia Data Authentication in Wavelet Domain
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Multimedia Data Authentication in Wavelet Domain

机译：小波域的多媒体数据认证

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摘要

With the wide applieation of multimedia data, multimedia content protection becomes urgent. Till now, various means have been reported, which can be classified into several types according to their functionalities, such as data encryption, digital watermarking or data authentication. They are used to protect multimedia data's confidentiality, ownership and integrity, respectively. For multimedia data authentication, some approaches have been proposed. In this paper, a wavelet-based multi-feature semi-fragile authentication scheme is proposed. According to the approximation component and the energy relationship between the subbands of the detail component, global feature and local feature are both generated. Then, the global watermark and local watermark are generated from global feature and local feature, respectively. The watermarks are then embedded into the multimedia data themselves in the wavelet domain. Both the feature extraction and embedding processes are controlled by secret keys to improve the security of the proposed scheme. In the receiver end, the extracted watermark and the one generated from the received image are compared to determine the tampered location. A new authentication method is designed and it is proved valid in the experiments. This authentication scheme is robust to general compression, sensitive to cutting, pasting or modification, efficient in real-time operation, and secure for practical applications.
机译：随着多媒体数据的广泛应用，多媒体内容保护变得迫在眉睫。迄今为止，已经报道了各种手段，根据其功能可以将其分为几种类型，例如数据加密，数字水印或数据认证。它们分别用于保护多媒体数据的机密性，所有权和完整性。对于多媒体数据认证，已经提出了一些方法。本文提出了一种基于小波的多特征半脆弱认证方案。根据近似分量和细节分量的子带之间的能量关系，生成全局特征和局部特征。然后，分别从全局特征和局部特征生成全局水印和局部水印。然后，将水印嵌入到小波域中的多媒体数据本身中。特征提取和嵌入过程均由秘密密钥控制，以提高所提出方案的安全性。在接收器端，将提取的水印和从接收到的图像生成的水印进行比较，以确定篡改的位置。设计了一种新的认证方法，并在实验中证明是有效的。该认证方案对一般压缩具有鲁棒性，对剪切，粘贴或修改敏感，实时操作效率高，并且对于实际应用是安全的。

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