An Image Secret Sharing Technique with Block Based Image Coding

Abstract

A (t, n) threshold secret image sharing scheme generates n share images from a secret image in such a way that any t or more share images can be used to reconstruct the secret image. In this paper we have proposed a (t, n) secret image sharing scheme where the secret image is first encoded by block based lossy compression technique and define t sub-images. The image compression technique gives a good quality image. To enhance the security level, the sub-images are scrambled by Arnold transform and then shares are generated. Finally, image hiding (i.e., steganography) concept is adopted to hide the shares within cover images. The proposed method gives good quality of the stego images.

A Study of Image Hiding Techniques in The Spatial Domain

“…Figure 7 depicts the method's block diagram . The method in [16] is Sharing secret image systems using data loss, proposed compression, and conversion system for grayscale images. Securing secret images is done by blocking depending on lossless compression technology.…”

“…Bits and Magic LSB for grayscale images [12] No development improved MSB [13] does not discriminate Edge finding and encoding XOR [14] Not using all kinds of images Dynamic Programming [15] Calculations are not easy based image coding [16] Replay requires the original image Calculations are not easy LSB and At the algorithm [17] Capacity Finding Edge and Link [18] Computationally Complex LSB and EMD [19] Limited to certain Information LSB [20] does not discriminate Random methods with the least significant bits [21] Computationally Complex DKL [22]…”