Abeer Salim Jamil and Abdul Monem S. Rahma 2023. Cyber Security for Medical Image Encryption using Circular Blockchain Technology Based on Modify DES Algorithm. International Journal of Online and Biomedical Engineering (iJOE). 19, 03 (Mar. 2023), pp. 99–112. DOI:https://doi.org/10.3991/ijoe.v19i03.37569.