Invertible secret image sharing with steganography and authentication for AMBTC compressed images

Abstract

Existing secret image sharing (SIS) schemes provided steganography and authentication abilities. But those schemes cannot deal with Absolute Moment Block Truncation Coding (AMBTC) compressed images. Moreover, if the cover image is significant, the distorted stego image cannot be reverted into the original form. In this paper, an invertible SIS scheme with steganography and authentication for AMBTC compressed images is proposed. The AMBTC compressed secret image is shared and embedded into the cover image to generate n AMBTC compressed stego images. To ensure the integrity of the stego image, parity bits are constructed and concealed into stego images. When revealing the secret image, the stego images are verified. By using those successfully verified stego images, distortion-free secret image and cover image are both obtained. Experimental results are demonstrated to show the effectiveness and advantages of the proposed scheme.