AB-DAM: attribute-based data access model in blockchain for healthcare applications

This research introduces a novel attribute-based data access model in Blockchain (AB-DAM) Framework in Healthcare Systems to enhance the authentication of the users before data transmission. The proposed AB-DAM strategy and the smart contract assure secure communication. The Data requestor (DR) requests access using a unique ID and password to the Data holder (DH), who processes the request and authenticates the Data user. The information of the DH is embedded in the blockchain using an encrypted master key. The DH does the data encryption process through attribute-based Encryption (ABE), and the encrypted files are uploaded to the Interplanetary File System (IPFS). When the smart contract identifies the user as valid, the DH sends the requested data to the DR through the IPFS. The proposed model obtained the responsiveness and genuine user detection rate value of 24.1578 s and 43.38%, respectively.