Image Steganography Using HBC and RDH Technique

Abstract

There are algorithms in existence for hiding data within an image. The proposed scheme treats the image as a whole. Here Integer Cosine Transform (ICT) and Integer Wavelet Transform (IWT) is combined for converting signal to frequency. Hide Behind Corner (HBC) algorithm is used to place a key at corners of the image. All the corner keys are encrypted by generating Pseudo Random Numbers. The Secret keys are used for corner parts. Then the hidden image is transmitted. The receiver should be aware of the keys that are used at the corners while encrypting the image. Reverse Data Hiding (RDH) is used to get the original image and it proceeds once when all the corners are unlocked with proper secret keys. With these methods the performance of the stegnographic technique is improved in terms of PSNR value.