Steganography based image sharing with reversibility

Abstract

Steganography is an art of hiding secret information in another information. The use of steganography is to maintain a covert communication between two parties. A (t, n) thresh-old secret sharing scheme is one popular method of implementing steganography. In this method, the secret image is distributed among n participants. Any t (or more) out of n authorized participants can recover the secret image and less than t participants cannot recover the secret image. In the proposed method, both secret and cover images are retrieved without any loss of information is called reversibility. The shadows can be successfully embedded in the cover image. The resulting stego images are visually good. Various image quality metrics are used to assess the quality of the stego images. The proposed scheme is efficient in terms of embedding capacity and is computationally faster compared to Pei-y.u et al., and other methods.