Research On Personal Health Data Identity Authentication Matching And Security Sharing Based On Blockchain

Electronic informatization of medical data is the main theme of the development of medical industry,but there are many obstacles in the process of electronic informatization of medical data,such as the privacy of medical data is easy to be leaked and tampered with,the medical malpractice caused by the mismatch between medical data and patients’ identity in the process of patients’ treatment,and it is difficult to realize the safe sharing of medical data among medical organizations.Therefore,protecting the privacy and security of medical data,ensuring the identity matching between medical data and patients,breaking the isolated island of medical information and realizing the safe sharing of medical data have become the hot spots in the current medical field.The continuous development of blockchain technology provides a strong technical support for solving the above problems.Blockchain is a kind of distributed ledger,which has the characteristics of tamper proof,decentralization,openness and transparency.It is very effective to solve the above obstacles of data informatization by using these characteristics of blockchain.In this thesis,the following specific researches are conducted on the matching of patients’ personal health data with patient identity authentication and data security sharing:1.Aiming at the accurate authentication and matching between the patient’s personal health data and the patient’s identity,a blockchain-based personal health data identity authentication and matching scheme was proposed.The scheme uses the interstellar file system to store the patient’s personal health data,realizes the decentralized storage of data,records the hash value of health data in blockchain network,confirms the tampering problem of health data,designs intelligent contract,uses the patient biological characteristics as one of the matching conditions of identity authentication,so as to ensure the data matches the patient himself.The comprehensive analysis shows that the scheme can protect the consistency,privacy and authenticity of data;efficiency analysis and evaluation analysis show that the scheme can achieve more effective functions under the condition of the efficiency is basically consistent.2.Aiming at the problem of patients requesting personal health data sharing in different medical organization structures,a blockchain-based personal health data safe sharing scheme was proposed.The scheme uses an improved searchable encryption algorithm to encrypt the keyword index,which can effectively resist the keyword guessing attack.Based on the blockchain,the scheme designs a smart contract for the data requester to initiate the search request,and the authorized users can initiate the search request to the smart contract from different medical organizations in the same blockchain network,so that the patients can be in different medical groups.Through the security verification,correctness verification and efficiency verification,the scheme has a certain practicality.