A Survey on the Techniques of Medical Image Encryption

Medical images are considered as one of the most important and sensitive data in Information systems. Sending medical images over the network requires a strong encryption algorithm such that it is resistant against cryptographic attacks. Among the three security objectives for the security of information systems namely confidentiality, integrity and availability, confidentiality is the most important aspect that need to be taken much care for the secure storage and transmission of medical images. This paper presents a comparison study of the encryption of medical images and extends an obvious scene for the researchers by examining the metrics such as PSNR (Peak signal-to-noise-ratio), MSE(Mean square error) and so on for various existing encryption techniques for medical images. This also comprises the process of analyzing the level of security, requirements and purpose of medical image encryption. This survey is useful for the researchers for the comparison of different encryption techniques implemented till date.