Multi-secret image sharing scheme (MSIS) is a technique to share multiple secret images over the internet. Normally, most of the secret image sharing schemes can share only a single secret image. However, due to the rapid development of internet technology, the necessity of sharing multiple images arises. An ( n , n ) MSIS is employed to share n images to n authorized participants. All the n participants are required to submit their respective shares to recover the original secret images. If the number of the participants is less than n , then reconstruction of the secret images is impossible. Most of the existing schemes which are in the frequency domain do not have the capability to handle multiple secret images. In this paper, a MSIS that uses the Discrete Cosine Transform is proposed to overcome the limitation present in the existing schemes. Moreover, the proposed scheme requires less computational time than the existing schemes. Security of the proposed scheme is analyzed and shows that the proposed scheme is computationally secure. Also, the proposed scheme can recover the same original secret images.

中文翻译：

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一种新的基于 DCT 的多秘密图像共享方案

多秘密图像共享方案（MSIS）是一种通过互联网共享多个秘密图像的技术。通常，大多数秘密图像共享方案只能共享单个秘密图像。然而，由于互联网技术的飞速发展，共享多张图像的必要性出现了。使用 (n,n) MSIS 将 n 个图像共享给 n 个授权参与者。所有n个参与者都需要提交各自的份额以恢复原始秘密图像。如果参与者的数量小于 n ，则秘密图像的重建是不可能的。大多数现有的频域方案不具备处理多个秘密图像的能力。在本文中，提出了一种使用离散余弦变换的 MSIS 来克服现有方案中存在的限制。此外，所提出的方案比现有方案需要更少的计算时间。对所提出方案的安全性进行了分析，表明所提出的方案在计算上是安全的。此外，所提出的方案可以恢复相同的原始秘密图像。