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Electronic medical record storage and sharing model and method based on blockchains

An electronic medical and blockchain technology, applied in the field of information security, can solve problems such as the inapplicability of the DPOS mechanism, and achieve the effects of reducing network overhead, ensuring authenticity, and resisting replay attacks

Active Publication Date: 2019-02-12
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the pre-selected nodes of the existing share authorization proof mechanism DPOS are acted by 101 institutions. Such a DPOS consensus mechanism determines representative nodes based on share authorization, and obviously the medical field related to patient health and medical research cannot be based on share authorization. The selection criteria to determine the representative node, because it requires a high medical level, authoritative medical institutions as representative nodes to judge the legitimacy of the release of medical data and access to medical data sharing, only in this way is scientific, so now Some DPOS mechanisms cannot be applied to the medical field

Method used

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  • Electronic medical record storage and sharing model and method based on blockchains
  • Electronic medical record storage and sharing model and method based on blockchains
  • Electronic medical record storage and sharing model and method based on blockchains

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Embodiment 1

[0060] Since paper-based medical records are still the mainstay at this stage and are kept by centralized medical institutions, it is difficult for patients to obtain the required medical records and medical history, which affects the quality of medical treatment; medical institutions cannot share data, which is not conducive to medical research ; The traditional centralized network is vulnerable to attacks, leading to data leakage; medical record data is frequently tampered with at will; patients' sensitive information cannot be protected from privacy, etc. To this end, the present invention proposes a blockchain-based model for secure storage and sharing of electronic medical records.

[0061] The present invention is based on the blockchain-based electronic medical record security storage and sharing model, see figure 1 , including data creators, data owners, cloud storage, alliance blockchain and data users. The data creator first sends the patient's electronic medical rec...

Embodiment 2

[0065] The overall composition of the model of safe storage and sharing of electronic medical records based on the block chain is the same as that of Embodiment 1. In the present invention, the alliance block chain is the control center of the entire model, and the certificate issuing (authentication) agency CA is responsible for each A new user (data creator or data owner) issues a certificate, the certificate includes account ID, public-private key pair (PK, SK), in order to realize the sharing of medical data, the data owner must first use his unique identity account in the alliance area Register and log in on the block chain; due to the limited storage capacity of the alliance block chain, personal medical records are encrypted and stored in the cloud storage, and only the reference to the data in the cloud storage is kept in the block chain, namely metadata, hash Hash value and signature, patients use their own private key SK pat Metadata i , original data hash value h ...

Embodiment 3

[0067] The overall composition of the blockchain-based secure storage and sharing model of electronic medical records is the same as in Embodiment 1-2. All references to medical record data on the alliance blockchain will contain different timestamps and encryption keys, that is, for medical Subdata, patients use their own private key SK pat Metadata i , original data hash value h i Perform ordinary digital signature with time stamp t, get Then a request is issued to the alliance blockchain, and the on-duty representative node in the blockchain network adopts the improved DPOS consensus mechanism to accept the transaction request and carry out block consensus. When the value represents the node RPN to verify each transaction, and integrate all the valid data collected during this period into a data set (expressed as M set ={Req‖t}), and then attach its own digital signature and the hash value of the new data block to form a new data block, and broadcast the newly generated...

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Abstract

The invention discloses an electronic medical record storage and sharing model and method based on the blockchains and solves problems of patient's rights of access to personal medical data and insecure storage and sharing of sensitive medical data in the prior art. The model is characterized by comprising data creators, data owners, cloud storage, federated blockchains and data consumers, whereinthe blockchain is a control center. The method comprises steps that system initialization is performed; medical data are acquired, and data storage with intercepted signatures is employed; data publishing with the improved DPOS consensus mechanism is employed; data sharing based on smart contracts is performed. The method is advantaged in that security, reliability, privacy protection and securestorage are achieved, in combination with the cloud storage technology and the interceptable signature technology, in the federated blockchains, users can set sharing conditions through the smart contracts, safe and effective data sharing and access can be realized, and strong practicality is achieved.

Description

technical field [0001] The invention belongs to the field of information security technology, and in particular relates to technologies such as improved share authorization certificate mechanism DPOS, smart contracts, cloud storage, and interceptable signatures, and specifically a model and method for storing and sharing electronic medical records based on blockchain. It can be used for secure data storage and sharing under blockchain technology. Background technique [0002] With the rapid development of the Internet, cloud computing, and Internet of Things technologies, the scale of data has increased dramatically, and concepts such as "Internet + health care" and "big data for medical health" have also followed. As an important data source of medical big data, the sharing of Electronic Medical Record (EMR) has great application value in the fields of hospital development, clinical service and clinical research. In fact, as early as the 1990s, Western countries such as th...

Claims

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Application Information

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IPC IPC(8): G16H10/60G06F21/62G06F21/60
CPCG06F21/602G06F21/6245G16H10/60
Inventor 刘景伟李鑫李晓璐孙蓉裴庆祺
Owner XIDIAN UNIV
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