Medical and diagnostic imaging fields have significantly benefited from technological advancements. Several methods are being used to improve and generate higher- quality images, and efforts are being made to develop an artificial intelligence-based solution for autonomous disease prediction from medical images. The medical field rapidly adapts to telemedicine, allowing patients to receive care from remote locations. As a result of these medical advancements, the need to send medical images across a network has grown exponentially, as have the challenges of doing so securely. These images contain susceptible and personal health- related records of a patient, and any manipulation of these images will result in incorrect predictions and, ultimately, the wrong course of treatment. Various encryption and watermarking techniques are used to secure these images. In this paper, we critically reviewed recent developments and trends in medical image security.