Dynamic Programming Based Encrypted Reversible Data Hiding in Images

Abstract

Reversible data hiding is a technique which enables images to be authenticated and then restored to their original form by removing the digital watermark and replacing the image data that had been overwritten. An efficient reversible lossless data hiding algorithm can recover the original image without any distortion and its Peak Signal to Noise Ratio (PSNR) lower bound is higher than that of all existing reversible data hiding algorithms. This article proposes a dynamic method to determine the most suitable peak-valley pairs instead of greedy way to maximize the embedding capacity of the object. Thus the embedding capacity and the image quality can be improved by this new approach. The application of data hiding includes hidden communication in military applications and watermarking of copyright protection, and so forth.

An efficient steganographic framework based on dynamic blocking and genetic algorithm

“…The LSB-based steganography [20,21,28] is the most popular approach in the spatial domain, in which the least significant bits of a cover image are overwritten with the data bit stream in a route according to a pseudorandom number generator (PRNG). The LSB replacement method increases even pixel values either by one or leaves them unmodified, while odd values are left unchanged or decreased by one.…”