A fine‐grained and secure health data sharing scheme based on blockchain

Abstract

Electronic health record (EHR) allows patients to use an open channel (ie, Internet) to control, share and manage their health records among family members, healthcare providers and other third party data users. Thus, in such an environment, privacy, confidentiality, and data consistency are the major challenges. Although cloud‐based EHR addresses the aforementioned discussions, these are prone to various malicious attacks, trust management and non‐repudiation among servers. Recently, due to the property of immutability, blockchain technology has been introduced to be as an auspicious solution for achieving EHR sharing with privacy and security preservation. Motivated by the above debates, we present BFHS, a blockchain‐based fine‐grained secure EHR sharing mechanism. On BFHS, we encrypt the EHR using ciphertext‐policy attribute‐based encryption (CP‐ABE) and upload it to the interplanetary file system (IPFS) for storage, while the matching index is encrypted via proxy re‐encryption and kept in a medical consortium blockchain. In addition, we created a credit assessment mechanism and incorporated it into the smart contract. Smart contracts, proxy re‐encryption, a credit evaluation mechanism, and IPFS all work together to give patients with a trustworthy EHR sharing environment and a dynamic access control interface. The thorough comparison and experimental analysis show that the proposed BFHS has more comprehensive security features and is more practicable.

The Role of Blockchain in Medical Data Sharing

“…If the user has private keys and intermediate decrypt parameters, he or she may compute the decryption key. Chen et al [59] offer BFHS, a blockchain-based method for the safe, granular exchange of EHRs. On BFHS, they encrypt EHRs using ciphertext-policy ABE and upload them to the IPFS for storage, whilst the matching index is encrypted with proxy re-encryption and stored on a medical consortium blockchain.…”

A blockchain-based traceable and secure data-sharing scheme

“…It identifies the user with a set of attributes, and if the user’s attribute set matches the set required for ciphertext decryption, the user can decrypt the private key to recover the ciphertext to plaintext. This allows for “one-to-many” encryption and decryption of data and reduces the system overhead ( Chen, Yin & Ning, 2022 ). However, in an attribute encryption system, multiple users with the same attribute set can exist in the system, which creates the possibility of unauthorized users decrypting data ciphertext.…”

Aplicação da tecnologia blockchain na gestão de dados dos prontuários eletrônicos de pacientes: revisão integrativa da literatura

“…Chen et al (2022) Os autores mesclam um sistema de arquivos interplanetário (IPFS) e a tecnologia blockchain, fornecendo um método de avaliação do usuário no contrato inteligente.Lai et al (2022) Propõe um sistema seguro de compartilhamento de dados médicos, baseado em assinatura rastreável e blockchain, para resolver o problema das dificuldades de compartilhamento de dados médicos entre instituições. Ahene et al (2022) Propõe uma nova criptografia de assinatura heterogênea com recriptografia de proxy (HSC-PRE), demonstrando como pode ser utilizado para obter segurança do registro eletrônico de saúde, sendo auditável e acessível, usando a tecnologia blockchain.…”