A Survey on Medical Image Security and Authentication Techniques Ashish Sethi, Vishal Garg, Shiva Sharma, Manisha Rastogi* Department of Biomedical Engineering Shobhit Institute of Engineering and Technology (A NAAC Acrediated Deemed to be University) Modipuram, Meerut Abstract: - Communication technology has made it easier to access the medical services at distance locations, where doctors are not physically available. During transmitting the data between two servers, data can be changed or tampered with various attacks. Several stenography and watermarking techniques were used for the authentication and security of data. So the aim of this data to compare two techniques and to compare their efficiency. Results indicates that CDMA with DWT is comparatively better than the CDMA technique. Keywords: Medical Images, CDMA Technique, CDMA with DWT, Image Quality Indices. 1. INTRODUCTION With the development of the latest communication technology it has become very easy and usual to take the expert medical service, advise from all over the world. The accessibility to these medical services at host domain is the part of telemedicine. Telemedicine itself work for different medical related technology like teleradiology, telesurgery, telepathy, telecare, teledermatologist and teleneurology.[1] This technology involves the use of computer to receive, store and transmit the information to a distant location. Advancement in technology has reduces the difficulty to access the better healthcare, cost of the analysis, so working as a boon in medical sector. [2] To access this technology medical information is used to transfer or exchanged over the internet for several purposes as teleconference among clinicians, interdisciplinary exchange between clinicians and radiologists for consultative purposes or to discuss diagnostic and therapeutic measures and for distant learning of medical personnel. [3] Over the several benefits of these tele services there is a risk of security with medical data as Internet is the open network where anyone can access the database for illegal use also. [4] So there is a need of some authentication and protection technology to access the data and secure transfer of the data as security of medical information is the prime goal of the telemedicine services. There are several techniques like cryptography, Steganography and watermarking are available those are majorly used for the security and authentication of the data. But previous research work shows a viable limitation with the use of cryptography, Steganography and shown watermarking as the best technique. Digital watermaking shows its Robustness, Higher Embedding Capacity, provide communications one point-to-multiple points, these quality make it preferable for the medical information security. [5] It embeds copyright information in the original file and doesn’t disturb the appearance of the original file. Not only is this it also difficult for the medical staff to maintain the patient record and information in form of file and the computers. So it can work as a secondary way where all the information and test reports would be embedded in the image itself. No other document is require to carry the with the patient. Whenever physician required can extract the information from the images itself. Watermarking itself broadly categories into spatial domain watermarking and frequency domain water technique. Here in this research work we are going to compare one spatial domain watermarking technique with Frequency domain watermarking technique. Aim of this research work is to check the efficiency of two different domain watermarking technique to investigate the strength and limitations of current watermarking scheme. 2. MATERIALS AND METHOD A. Image: For this research work image was taken from TCIA dataset for medical images. It has majorly CT and MRI obtained Medical image. We have chosen CT cancer image. And the Watermark or Copyright image is formed in Bit Map Format image with 256 gray level, 8 bit depth, 512 X 512, 20 X 50 and 9 X 12. Watermark and Original images are used in same format and size for easy image processing. Matlab 12b is used as a working platform for this research paper. (a) (b) (c) Figure 1: (a) Original CT Cancer Image (b) Copyright Image (c) Copyright Image B. Techniques: Here is this work the comparison would be carried out between two watermarking techniques in spatial and frequency domain, CDMA watermarking technique from Spatial and CDMA Watermarking with DWT will be use from frequency domain. The comparative analysis would be carried out by comparing Time required for embedding and recovery of the watermark, Signal to noise ratio, Robustness, Capacity, Tamper resistance. International Journal of Engineering Research & Technology (IJERT) ISSN: 2278-0181 http://www.ijert.org IJERTV7IS070029 (This work is licensed under a Creative Commons Attribution 4.0 International License.) Published by : www.ijert.org Vol. 7 Issue 07, July-2018 67