Steganography based information security with high embedding capacity

A novel high embedding capacity for spatial domain image steganography is proposed in this paper. In this method, two secret images are embedded into a cover image of same size with good quality. A (t, n) threshold 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. The proposed method also satisfies the reversibility property of steganography to reconstruct secret and cover images without any loss of information. 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 the existing methods.