Medical pictures and patient`s data are exchanged between various teams to be investigated and assessed by experts who are topographically separated. Any illicit alteration in this data or the event of information loss during the transmission over an uncertain channel may prompt wrong presumptions which may cause an unfavorable impact on patients. Hence, the security of medical images is always been a concern. This security can be provided by the concepts of cryptography. When it is the case of images, an effective security can be provided by using various methods in the domain of Visual Cryptography. In this paper, the various methods used in encrypting the medical images, their efficiency and drawbacks are discussed. A relative analysis based on the performance metrics utilized in these procedures is provided. This article also explores the various key factors and challenges faced in Visual cryptography techniques.

Medical images Encryption, Visual Cryptography, Visual Cryptography Techniques, Medical data security

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