A Symmetric-Key Block Cipher Method for Medical Image Encryption to Promote Internet of Medical Things Applications

The security of medical healthcare images has been the subject of several research projects; therefore, security is a challenge in medical imaging. A solution to image confidentiality is encryption, which does not risk data loss. E-health data cannot be directly encrypted due to limitations in data size, redundancy, and capacity, especially when transmitted over open channels. As images contain more information than text, patients may lose privacy in the content of their medical records because they are not as confidential as text. These threats have been identified by researchers, who have proposed several ways to mitigate the security risks associated with them. The study found that several application-specific security issues remain with the existing proposed techniques. Using an efficient, encryption algorithm, this paper presents an image encryption technique for healthcare. A robust encryption technique is used to encrypt medical images using the Least Significant Bit ( LSB ) technique. Our novel contribution here is that watermarks are embedded in encrypted domains and their extraction is performed in encrypted and decrypted domains. The proposed algorithm was evaluated using numerous test images. According to the experiment, the proposed algorithm performs better than conventional methods when it comes to image cryptosystems.