earticle

영어

PDS platform has gained attraction due of its benefit of rapid and automatic medical data transfer. One critical issue of current PDS platforms is the absence of capability to prevent the personal medial data delivered to legal users from being retransferred to and accessed by other illegal users. Existing authentication methods grant access of legal users and reject access of illegal users. However these existing methods cannot prevent personal data delivered to legal users from being retransferred to and accessed by other illegal users. In order to manage illegal access of delivered personal medical data, we design a reliable access management scheme that prevents illegal access of non-permitted users to sensitive personal medical data. The proposed scheme encrypts all personal medical data and allows the decryption of encrypted data only to legal users passed through authentication. In order to guarantee operation reliability, the access management function is implemented with smart contract software upon the blockchain system. Also the scheme records access history of legal and illegal users into the blockchain storage for reliable access tracking. Evaluation shows that the proposed scheme controls the access of legal users and illegal users with 100% accuracy. The proposed scheme helps highly sensitive medical data related to personal privacy from to be disclosed only to involved entities but not to unauthorized entities.