Secured Reversible Data Hiding using Histogram Shifting Method

Abstract

The Internet has become one of the significant ways of communication. Sending medical information from one place to another sometimes may cause leakage or interruption in the messages that are being sent. Thus it is necessary to protect the patient's medical information being sent through the network. Cryptography, Steganography are some of the various techniques that are being used to protect data from the outside world. Here, the patient's information is encrypted using chaotic encryption and the image is compressed by The Absolute Moment Block Truncation Coding (AMBTC) compression method. The chaotic encryption is employed in the system to improve robustness against security vulnerabilities. The compressed image is embedded into the cover image by the histogram modified embedding method. Various keys are used for encrypting and embedding the information into the image. The reverse process is done on the receiver side to retrieve the original image and the patient's information without any loss or distortion by using the same key. The Peak Signal to Noise Ratio (PSNR) of this method is obtained above 50dB.