ABSTRACT
An image secret sharing scheme (ISSS) divides a secret image into some shadow images (referred to as shadows) in a way that requires the shadows in a certain privileged coalitions for the secret reconstruction. However, the secret image cannot be revealed if they are not combined in the prescribed way. A typical ISSS is often a (k, n)-threshold scheme, where k is the threshold value to reveal the secret and n is the number of total shadows. One can
and Secret
reconstruct a secret image by k or more shadows, while he cannot conjecture any information from less than k shadows. There are two major categories in ISSS: one is the visual cryptography scheme (VCS) and the other is the polynomial-based ISSS (PISSS).
