Discrete Wavelet Transform-Based Reversible Data Hiding in Encrypted Images

In the era of multimedia technology, not only reinstatement of the original media without any loss of information is required but also the security of the content is of utmost importance. In this paper, a novel discrete wavelet transforms (DWT)-based RDH-EI scheme is proposed. The approximation band of DWT has been utilized for data embedding. Also, disarrangement of DWT sub-bands is practiced for enhancing the security. Proposed scheme is simple to implement and takes less time to execute. Standard grayscale images are tested and compared with existing techniques. The results reflect supremacy of proposed scheme in terms of correlation, PSNR, and computational efficiency.