National Chung Hsing University
Dual-images reversible data hiding methods can embed massive confidential messages and generate an excellent stego image. However, each confidential message and the cover image cannot be recovered if any stego image is missed. In order to overcome this drawback, the authors proposed a (k, n)-image reversible hiding method that can restore the cover image and k confidential images from n stego images. Additionally, (n - k) cheating images can be embedded into stego images, which can deceive hackers or increase their analysis cost. Consequently, the proposed method possesses four properties, i.e., large hiding capacity, excellent stego image, good robustness and security.