Implementing Steganocryptography in Scanner and Angio-Scanner Medical Images

Abstract

Telemedicine is a field of research in modern telecommunication and information technologies. It provides remote clinical care to help many people. Communication through internet and its services are becoming less expensive every day. This aspect of a positive growth of internet communication brings more possibilities to intercept and have access into the information as well. Data privacy and integrity are the main aims in data communication, nowadays. Many methods exist to keep secure the data that are transmitted through internet but none of them is perfect. To increase the efficiency of data protection, different methods and combinations are used. This paper analyzes the amount of hidden information by combining the data encryption and steganography techniques in medical images. The images taken into account are obtained from scanner and angio-scanner. The patient data are encrypted previously, then included in the scanner and angio-scanner images substituting the image LSBs. The results of the experiment are assessed by doctors, they admit that there is no visual difference between the original and the cover images. This paper analyses the sum in percentage of intensities, SSD and PSNR of the images used. The results show that this method achieves a higher performance in the scanner images than in the angio-scanner.