Abstract Recently, Secret Image Sharing (SIS) has attracted more and more researchers’ attention, in which a secret image is divided into several shadows for sharing. In practice, the produced shadows are meaningless, and are easy to be attacked if that shadows are directly used in transmission. In order to overcome the shortcoming, the shadows would be embedded into the cover image so as to be transmitted to participants securely. The embedding methods of most schemes are based on Least Significant Bit (LSB) replacement in the spatial domain, however, the embedded data can be easily detected by steganalysis algorithm. Moreover, the embedding capacity, visual quality and security need to be improved. In this paper, a secure and effective Discrete Wavelet Transform-based Secret Image Sharing with Authentication (DWT-SISA) is proposed. In DWT-SISA, the carrier has a better embedding capacity and a better visual quality after embedding. Furthermore, for the sake of solving the issue of cheater prevention, more authentication bits are embedded into the carrier. The experimental results and theoretical analysis show that the proposed scheme is secure and effective.

中文翻译：

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DWT-SISA：一种安全有效的基于离散小波变换的带有身份验证的秘密图像共享

摘要 近来，秘密图像共享（SIS）吸引了越来越多的研究人员的关注，其中秘密图像被分成若干个阴影进行共享。在实践中，产生的阴影是没有意义的，如果直接在传输中使用阴影，很容易受到攻击。为了克服这个缺点，将阴影嵌入到封面图像中，以便安全地传输给参与者。大多数方案的嵌入方法都是基于空间域中的最低有效位（LSB）替换，但是，嵌入的数据可以通过隐写分析算法轻松检测到。此外，嵌入能力、视觉质量和安全性有待提高。在本文中，提出了一种安全有效的基于离散小波变换的带有身份验证的秘密图像共享（DWT-SISA）。在 DWT-SISA 中，载体具有更好的嵌入能力和嵌入后更好的视觉质量。此外，为了解决防作弊问题，在载体中嵌入了更多的鉴权位。实验结果和理论分析表明，所提出的方案是安全有效的。