基于联盟链的电子健康记录隐私保护和共享

医院正在逐渐采用电子健康记录(EHR)的方式去记录患者的医疗信息。然而,医疗数据的隐私性和EHR标准的差异化阻碍了医疗数据在病人和医院之间的共享。因此,针对隐私信息泄露和难于共享的问题,提出了一个基于联盟链的隐私保护数据共享模型。此外,基于匿名算法提出了(p,α,k)匿名隐私算法,能够解决EHR隐私信息泄露的问题。通过理论分析和实验证明,提出的基于联盟链和(p,α,k)隐私匿名算法模型能够在保护数据隐私的前提下,实现病人和医院之间的数据安全共享。对比前人的模型,该模型具有所需节点少、减少主链压力、容错性强和病人对EHR完全控制等优势。

Privacy protection and sharing of EHR based on consortium blockchain

Hospitals are gradually adopting EHR methods to record patients’medical information.However,the privacy of medical data and the differentiation of EHR standards hinder the sharing of medical data between patients and hospitals.Therefore,for the problem of leakage of private information and difficulty in sharing,this paper proposed a privacy protection data-sharing model based on the consortium blockchain.In addition,based on the anonymous algorithm,it proposed the(p,α,k)anonymous privacy algorithm,which could solve the problem of EHR private information leakage.Through theoretical analysis and experimental results,the proposed consortium-based chain and(p,α,k)privacy anonymity algorithm model can realize data security sharing between patients and hospitals under the premise of protecting data privacy.Compared with the previous models,the proposed model has the advantages of fewer nodes,less main chain pressure,better fault tolerance and complete control of the patient’s EHR.