Protected Color Image Transmission Using Steganography Based On Shamir’s Threshold

Abstract: Steganography has become one of the most fascinating research areas in recent years. Steganography is a kind of data hiding technique that provides another way of security protection for digital image data. It is usually applied in various digital media types such as image, video, and audio at present. We present a new image sharing method based on Shamir’s (t, n) threshold scheme. In this paper we are considering two color images , one as cover image and other as secret image. Secret image is hidden in cover image. Quantization process is applied to improve the quality of the cover image .In (t, n) threshold scheme, where a dealer encrypts and divide the secret into n number of shadows. The dealer then distributes the shadows to the authorized participants. Any t out of n, authorized participants can cooperate to reveal the secret data with their corresponding shadows. Single individual participants share is of no use. Peak signal to noise ratio is applied to analyze the quality of the stego images. The simulation results show that the secret and cover are reconstructed without loss.

Keywords: Secret image sharing; Steganography,Stego-image, (t, n)-Threshold Scheme.