A Secure Information Exchange and Efficient Access of Electronic Health Records using Blockchain Network

Abstract

A permissioned blockchain framework, securely exchange the information, provides high assurance
and guarantees the integrity of data provenance. In order to effectively and securely share the
healthcare information within a data sharing network, in this work, the signcryption identity based
cryptosystem is explored using the concept of bilinear pairings, which allows the nodes to interact
anonymously and securely on the network. This ensures that health care blockchain network is a
distributed tamperproof database that secures all the health records and is added to it and replicated
across a collection of nodes connected as a peer to peer network. Each health record is considered as
a unique event that contains a timestamp and assigns a hash of the record, which is created by a
cryptographic hash algorithm. Similarly all the record events are bundled into transaction blocks.
The ledger of hashed records/events creates a log that is replicated across every peer to peer node in
the network. Further, this health care blockchain network includes additional information like user
permission lists which acts as instructions for the network.This paper address to ensure the data
integrity of the EHRs, providing security for sharing of EHRs among the different medical
institutions and within the organization and finally secure exchange of EHRs by eliminating the
trusted third party. To provide security for the health care data sharing different kind of
cryptographic techniques are being used in the blockchain. In the proposed design methodology
signcryption is used for secure health care data sharing