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首页> 外文期刊>International journal of digital crime and forensics >Random Grid and Reversible Watermarking-Based On Verifiable Secret Sharing for Outsourcing Images in Cloud
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Random Grid and Reversible Watermarking-Based On Verifiable Secret Sharing for Outsourcing Images in Cloud

机译：基于可验证秘密共享的随机网格和可逆水印技术，用于云中外包图像

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摘要

A novel random grid and reversible watermarking based verifiable secret sharing scheme for outsourcing image in cloud is proposed in the paper. In the proposed scheme, data owner firstly embeds the hash value of the secret image into the secret image itself using reversible watermarking algorithm; then, watermarked image is divided into $n$ sub image. Secondly, the hash of n sub image is calculated, and then the hash value is transformed into the initial value of hyper-chaos, thus n random grids are generated by different hyper-chaos. Lastly, after expanding the sub-image to the same size with the original secret image, it is performer XOR operation with the corresponding random grid, this will accordingly produce $n$ sharing secret. In order to securely outsource the image in the cloud, the generated shares are issued to the $n$ different cloud server. For authorized user, (s)he can get shares from different cloud server, and then can recover the original secret image through a series of decryption operations and extraction of reversible watermarking. The proposed scheme can losslessly restore the original secret image, and have the double verification ability, that is to say, it can verify whether the anyone of the sharing is modified, and it can also verify whether the original secret image is completely reconstructed. Some analysis and comparisons are given to show the security and effectiveness of proposed scheme.
机译：提出了一种新颖的基于随机网格和可逆水印的可验证秘密共享方案，用于云图像外包。在提出的方案中，数据拥有者首先使用可逆水印算法将秘密图像的哈希值嵌入秘密图像本身；然后，将带水印的图像分为$ n $个子图像。其次，计算n个子图像的哈希值，然后将哈希值转换为超混沌的初始值，从而由不同的超混沌生成n个随机网格。最后，在将子图像扩展到与原始机密图像相同的大小之后，将其与相应的随机网格进行执行XOR操作，这将相应地产生$ n $共享机密。为了安全地将云中的映像外包，将生成的共享发布到$ n $不同的云服务器。对于授权用户，他可以从其他云服务器获取共享，然后可以通过一系列解密操作和可逆水印的提取来恢复原始秘密映像。所提出的方案可以无损地恢复原始秘密图像，并且具有双重验证能力，也就是说，它可以验证共享中的任何一个是否被修改，并且还可以验证原始秘密图像是否被完全重构。通过分析和比较，证明了该方案的安全性和有效性。

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