An efficient chain code for access control in hyper ledger fabric healthcare system

•Proposal of a Blockchain-based solution using hyperledger fabric for privacy protection in electronic health records (EHRs).•Emphasis on the importance of contemporary ICTs for secure gathering and transmission of EHRs while ensuring patient privacy.•Introduction of an efficient deployment architecture and chain code for design and access control in hyperledger fabric framework.•Demonstration of the effectiveness of smart contracts and blockchain technology in safeguarding patient information and preventing unauthorised access to EHRs.•Provision of experimental results analyzing system performance and computational tests. The emergence of eHealth has been instrumental in enhancing healthcare systems, offering improved health services to diverse patients with the aid of cutting-edge technologies. The safe and effective collection, transmission, and accessibility of electronic health records (EHRs) using modern information and communication technologies (ICTs) is essential for realizing the goals of eHealth. However, the use of EHRs by healthcare practitioners creates the risk of data breaches and jeopardizes patient confidentiality. Fortunately, smart contracts and blockchain technology offer effective EHR access control techniques that can enable secure client identification, authentication, and authorization, enhancing the security of EHRs.So, this paper brings effective Blockchain-based solutions using Hyperledger fabric for providing privacy to EHRs. An effective deployment architecture and chain code were generated for design and access control. In this case, the utilization of Hyperledger Fabric as the Blockchain technology introduces a new consensus mechanism, enabling efficient scalability and safeguarding anonymity. By employing Hyperledger Fabric for framework development, the system achieves its objectives. Experimental results are carried out for analyzing the system performance and also computational tests.