Designing a Secure Environment for EHR in Ethereum by Employing RSA and NTRU

Blockchain is a widely sought-after technology that acts as a distributed ledger to store documents safely and securely. Many applications of blockchain like service voting systems, document storage systems and EHR (Electronic Health Record) systems attest to the fact that storing data in blockchain is a decision well taken. This annihilates any possibility of single-point failures in the system at any given circumstance. EHR is a valuable document that has to be deposited in a secure environment such that only the authorized people can access it (the doctors and the patients in our case), Authorization is done when the person joins the network. The aim is to create a secure and immutable Electronic Health Record (EHR) storage system using Ethereum which allows patients to upload their documents. The proposed system facilitates secure data storage and transfer between patients and doctors through the InterPlanetary File System which is a protocoled peer-to-peer file sharing and storing system that uniquely identifies each file by employing content addressing in the global namespace. On implementation, the proposed system ensures the secure storage of health records of the patients that can be shared safely with their selected healthcare provider as and when required and free from tampering. The documents are encrypted using the Rivest Shamir Adleman algorithm (RSA), the public key of which is further encrypted using the Nth degree Truncated Polynomial Ring Units algorithm (NTRU) for leveraging extra security to the system. The system itself leans towards being patient-centric and strives to provide them with complete privacy and autonomy over their personal medical data records. As the healthcare sector adopts patient-centred models, patients will have more control over their medical records and receive higher-quality care. Confidential computing and blockchain technology can be combined to build a network of cooperative ecosystems that will facilitate more secure and safe data sharing.