Abstract: Aiming at the problem that the image should be permutated before it is shared, based on (t, n) threshold multi-secret sharing theory, a non-permutated image secret sharing scheme is proposed. It makes use of the n+1 participator’s secret shadow as a gene to participate in sharing and recovering. The gap between the adjacent pixels is increased effectively. This scheme doesn’t need added secret key transmission. It is easy to be extended and the size of each shadow image is reduced to 1/t of the secret image. Experimental result proves this scheme is feasible.

Key words: secret sharing, non-permutated, shadow image

摘要： 针对图像秘密共享前需要像素置乱的问题，基于(t, n)门限多重秘密共享思想，提出一种免置乱的图像秘密共享方案，以第n+1人的秘密份额作为因子参与秘密分割与重构，加大相邻像素之间的差距。该方案无需进行额外的密钥传输，运算简单高效、易于扩展，生成的影子图像也仅为原图像的1/t，有效压缩了尺寸。实验结果证明了该方案的可行性。

关键词: 秘密共享, 免置乱, 影子图像

CLC Number: 

• TP309