【作者】 欧佐；

【导师】 张功国；

【作者基本信息】 重庆邮电大学 ， 电子与通信工程（专业学位）， 2021， 硕士

【摘要】 医疗数据电子信息化是当今医疗行业发展的主旋律,而在数据电子信息化过程中却存在着重重阻碍,例如医疗数据隐私易遭泄露、篡改,患者就诊过程中医疗数据与患者身份不匹配导致医疗事故发生,医疗数据在各个医疗组织机构间难以实现安全共享等。因此保护医疗数据的隐私安全、确保医疗数据与患者身份匹配、打破医疗信息孤岛实现医疗数据安全共享等方面成为当前医疗领域研究的热点。区块链技术的持续发展,为解决以上问题提供了一个有力的技术支撑。区块链是一种分布式账本,具有不可篡改、去中心化、公开透明等特点。通过利用区块链的这些特点进行研究解决上述医疗数据信息化面临的障碍是十分有效的。本文针对患者个人健康数据与患者身份认证匹配及数据安全共享,进行了以下具体研究:1.针对患者个人健康数据与患者身份实现准确认证匹配,提出了一个基于区块链的个人健康数据身份认证匹配方案。该方案采用星际文件系统存储患者个人健康数据,实现数据的去中心化存储,区块链网络记录健康数据哈希值,确认健康数据篡改性问题,通过设计智能合约,使用患者生物特征作为身份认证匹配条件之一,确保数据与患者本人匹配。通过方案综合分析表明,该方案对数据的一致性、隐私安全和真实性可起到保护性作用;效率分析与评估分析表明,本方案在效率基本一致情况下,能够实现更多的有效性功能。2.针对患者在不同医疗组织结构请求个人健康数据共享问题,提出了一个基于区块链的个人健康数据安全共享方案。方案采用一种改进的可搜索加密算法对关键字索引进行加密,可有效抵抗关键字猜测攻击;方案基于区块链设计了针对数据请求者发起搜索请求的智能合约,获得授权用户可在同一区块链网络内的不同医疗组织机构向智能合约发起搜索请求,实现患者在不同医疗组织机构共享个人健康数据功能,通过安全性验证、正确性验证和效率验证表明,该方案具有一定的实用性。更多还原

【Abstract】 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.更多还原