A Security Management Framework for Big Data in Smart Healthcare

Big Data analytics in the medical sector can assist medical professionals to facilitate improvement in healthcare. With the help of data analysis, clinical images of patients can be used to detect certain medical conditions. In the COVID-19 pandemic, many integrated technologies are being used to remodel the healthcare systems. The management of an integrated healthcare solution necessitates the need for security of the medical data. In this paper, we propose a security framework based on the Logistic equation, Hyperchaotic equation, and Deoxyribonucleic Acid (DNA) encoding. Subsequently, a Lossless Computational Secret Image Sharing (CSIS) method is used to convert the encrypted secret image into shares for distributed storage in cloud-based servers. Hyperchaotic and DNA encryption is performed to improve the overall security of the system. Furthermore, Pseudorandom Numbers (PRN) generated by the logistic equation are XORed with the image sequence in two phases by changing the parameters slightly. Finally, the application of Secret Sharing (SS) generates completely noise-like cipher images that enhance the security of the cloud-based cryptosystem. The generated shares are small in size and require fewer resources like storage capacity and transmission bandwidth which is highly desirable in IoT-based systems. It is verified that the cryptosystem is highly secure against attacks as well as interferences and has a very strong key-sensitivity.