An Improved Reversible Data Hiding Scheme Through Novel Encryption

Abstract

Reversible data hiding is an active research area in the field of medical image transmission. In general, along with the medical image, we may want to transmit some additional data such as patient details, diagnosis results, etc. The reversible data hiding schemes allow us to embed such additional information in the medical image itself instead of sending it as a separate file. A reversible data hiding through encryption scheme is already proposed and the existing scheme achieved to obtain good embedding rate with very less bit error rate. In this paper, we modified the existing reversible data hiding through a novel encryption process to improve the embedding rate by a factor of three without compromising the bit error rate. As per the proposed scheme, three bits of information could be inserted into a single image block of size B × B pixels. Similar to the existing scheme, in the proposed scheme also the sender and receiver want to share three encryption/decryption keys only.