Sharing and managing medical data system based on blockchain with bloom-filter scheme

Technological development has produced the concept of Blockchain, which is growing more recently due to decentralization, trust, and transparency, becoming the cornerstone of records and data archiving systems around the world and its use in many applications. The healthcare industry can benefit substantially from blockchain since it offers data confidentiality and immutability. When it comes to management, data security, and accessibility, medical data has several issues. Unauthorized access to medical data and improper use of patient disease reports are only two examples of the numerous security risks relating to patient privacy. To provide a more convenient service and environment for healthcare and solve the above problems, an index-based scheme is proposed based on the blockchain, Bloom filter, and an external database. The proposed approach allows access to medical data after selecting the persons authorized by the data owner. The data owner extracts the keywords and then encrypts the data and stores it in the database using the data enquirer’s public key. The data enquirer obtains the ciphertext by searching the data storage location that is encrypted using the keyword and decrypts the ciphertext with the corresponding private key locally. As a result, the proposed scheme keeps patient data securely with the ability to share data with different parties and access this data remotely. Moreover, the proposed system also focused on maintaining the privacy of data between peers in the Blockchain network.