Design And Implementation Of The Identity Authentication Protocol Based On The Medical Blockchain

The continuous improvement of medical informatization has led to the digitization and electronic management of a large amount of medical information,promoting the convenience and cost reduction of remote and online medical services.However,at the same time,issues such as unauthorized access to data and personal privacy leaks are becoming increasingly prominent.In addition,the large number of medical institutions and their relatively closed data management systems also hinder the flow of data,causing inconvenience for patients.Therefore,the security sharing of medical data and the protection of personal data privacy have become urgent problems that need to be solved.This paper analyzes the research status of security sharing of medical data and protection of personal data privacy,summarizes the current application status of identity authentication technology in the medical field,analyzes the security risks and defects.Propose an identity authentication protocol based on medical blockchain,as well as a medical blockchain model as the application scenario of the identity authentication protocol.The main research results are summarized as follows:(1)An identity authentication protocol based on medical blockchain is proposed.To reduce on-chain stress and reduce demands on user devices,this protocol designs off-chain Identity authentication to issue digital certificates to physicians and patients through Identity authentication agencies for blockchain.A signature scheme is designed,which combines multiple signatures and state secret algorithm to ensure the security of signatures and improve the efficiency of collaborative authentication.The protocol integrates two-way authentication function,which can avoid the trust problem between doctors and patients,resist the middleman attack,and ensure the ownership and access control rights of the patient’s own data.Finally,this protocol is compared with other schemes,and the results show that this scheme has low computing cost,strong security,and can realize identity authentication securely and efficiently.(2)A medical blockchain model is proposed.The medical Blockchain model is designed as the application scenario of authentication protocol.According to the regulatory requirements of medical data,the Consortium Blockchain structure is combined with the PKI system to realize partial decentralization of authentication and ensure that the medical data can only be circulated among authorized personnel while avoiding the risk of single point of failure.The model divides nodes into full nodes and light nodes.smart contracts is used to automatically realize the interaction between nodes,avoid the risk of information disclosure caused by human operations,and reduce the requirements of Consortium Blockchain access rules for equipment.Participants of the model are divided into on-chain nodes and off-chain users to avoid excessive data redundancy and excessive on-chain pressure caused by too many onchain users.Two chains are set to store medical records and certificates respectively to control the storage intensity on the chain and ensure that the data operation records can be traced.Blockchain technology combined with identity authentication technology to achieve secure access to data.Finally,based on the model,a medical identify system based on the medical blockchain is designed as the application scenario of the protocol to realize the application of the protocol.