CN111400401A - Electronic medical record storage system based on block chain - Google Patents
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Abstract
The invention provides an electronic medical record storage system based on a block chain, which comprises a login management client, a medical record management client and a block chain client; based on the characteristics of non-tampering, decentralization, data encryption and trust transfer of the blockchain technology, the blockchain stores data of different medical institutions on the chain through a uniform data format, the distributed storage technology is used, the data storage efficiency is improved, and the encryption technology is used for guaranteeing the data security. The invention solves the problems of difficult sharing, poor safety and the like of the electronic medical record, and the patient has the control right of accessing data, thereby ensuring the privacy of the data to a certain extent.
Description
Technical Field
The invention belongs to the technical field of block chains, and particularly relates to an electronic medical record storage system based on a block chain.
Background
At present, with the development of internet and cloud computing, the research on a data security storage sharing technology is deeper, medical records of patients serve as a precious data asset, and a medical record data sharing system is rapidly developed. The advent of electronic medical record sharing systems has greatly facilitated patient convenience and research in the medical field.
The traditional electronic medical record system usually adopts a centralized mode to store data, a trusted third party must be found, however, once the database of the third party is broken or the third party sells the data for the benefit, the problems of data privacy safety and the like are caused. The popularization of the electronic medical records also has a lot of contents to be perfected, and if a data sharing system which can share medical records of different organizations and can synchronize data in time is created for doctors and researchers, the research progress of the researchers can be accelerated, and a better treatment scheme can be provided for the doctors in time. Paper documents are also used by many medical institutions today to store medical data, which is not only easily damaged but also inconvenient to query and share. The data formats recorded by some medical institutions which use electronic documents to store data are not uniform, so that the medical data among different institutions cannot be safely and quickly shared, and the data sharing difficulty is serious on the premise of ensuring that the medical data can be safe, timely, extensive and accurate.
The personal medical record is owned by the person, belongs to private data and can be obtained only by the authorization of the information owner. Ensuring privacy and security of medical data is a mandatory requirement of law, and simultaneously stealing and illegally misusing personal medical data is a moral problem. The anonymity of data can be used to secure data privacy in protecting data privacy. In the existing system, personal medical data of a patient are scattered and are controlled by different medical institutions or enterprises, and the data are difficult to coordinate and manage; secondly, the privacy problem of the user is often ignored by the patient data due to the economic benefit of the enterprise, the patient cannot manage and control the medical data of the user, and the permission setting and the access control cannot be performed. Thus, such traditional decentralized storage and centralized management approaches and systems have not been the best way to store patient medical records. A patient-centered development trend is shown in a cloud storage system model, namely, a patient has own medical record ownership and can have data control authority of own medical record. In the data model of cloud storage, a patient can upload own medical data to a cloud server, and when the data is used, access authority can be controlled, and a doctor needing to use the data can be selectively authorized. However, such a system is partially insufficient, and when a patient or a doctor needs to use the medical data, a lot of time is wasted for data verification and authority confirmation, and human resources are wasted. This may make the efficiency of obtaining medical data by patients and doctors become abnormally slow, seriously affect the treatment time of patients, hinder the development of medical big data and medical research, and may also cause many problems in the process of obtaining data, such as data may be tampered, response is slow, data privacy problem, etc.
Disclosure of Invention
The invention aims to provide an electronic medical record storage system based on a block chain, which solves the problems of difficult sharing, poor safety and the like of the electronic medical record, enables a patient to have the control right of accessing data and can ensure the privacy of the data to a certain extent.
The invention provides the following technical scheme:
an electronic medical record storage system based on a block chain comprises a login management unit, a medical record management unit and a block chain client;
the medical record management comprises the following steps: establishing a medical record, and establishing the medical record for the treatment of the patient by a login management client, a medical record management client and a block chain client; uploading medical records, and uploading the created medical records to a database by a doctor; updating patient medical records, and updating the unique case ID of the database to the electronic medical records of the block chain stored by the patient by the system; patient medical record inquiry, which is to inquire all medical records, appointed disease cases, medical records above appointed, and the like of a certain medical record; inquiring medical record of a doctor, wherein the doctor inquires medical treatment information disclosed in a database;
the login management comprises the following steps: creating a login account for a new doctor or patient; the user logs in, so that the user can log in a corresponding user system; the private key verification is that the private key of the patient needs to be effectively verified in the login process of the patient user; DES and RSA encryption, namely encrypting the personal information of a patient by using a DES algorithm, and encrypting the personal information of the patient and an electronic medical record by using an RSA algorithm; DES and RSA decipher, use RSA algorithm decipher patient's data to get the electronic medical record, DES algorithm decipher get patient's personal information;
the block chain client comprises: node information configuration, which is to configure network address information of various different nodes in a block chain network; creating a channel and creating a block chain channel; deploying chain codes, and deploying the intelligent contracts into the block chains; creating a query request, and creating a query request corresponding to the intelligent contract; and sending a query request to the block chain network.
Preferably, the block chain construction model comprises a consensus layer, an application layer, a data layer, a network layer and a contract layer, the electronic medical record is dynamically managed, medical record data is packaged according to a format of a block head and a block body, then a timestamp is added, the data is stored in the block chain for service, and the data is distributed in different node data paths through a management mechanism in the network layer; in the consensus layer, nodes, including hospitals, governments and the like, are added to a block chain, and a consensus algorithm is encapsulated; in a contract layer, the medical records are mainly normalized and standardized; in the application layer, data sharing or data information query is provided for users.
Preferably, the establishment of the architecture of the storage system comprises a Web server, a Django Web server and a database; the system of the Web server is displayed on a browser in a webpage form and used as a display layer of the system; the framework of the Django Web server consists of three layers, wherein the first layer is a template layer, the second layer is a view layer and the third layer is a model layer, the template layer is responsible for providing a display surface, codes and a decoration device, the view layer is mainly responsible for calling related functions, operating and coordinating the model layer and the template layer, and the model layer is mainly responsible for operating a database and connecting the database; and the database is mainly used for providing a data processing environment, and storing medical record data of the patient by using the data management capability of Mysql.
Preferably, the medical record management further comprises:
a medical record is created, and after a doctor logs in a medical record management system, the medical record can be created for a patient, wherein the content of the medical record comprises the name, the sex, the telephone number, the treatment condition of the patient and the like of the patient;
the medical record of the patient is updated, the information of the medical record can be updated and modified after the patient goes a doctor, and the updating and the modification can be performed only after the authorization of the patient is obtained;
the medical records of the patient are uploaded, and the medical record information of the patient can be uploaded by a doctor after the patient goes a doctor.
Preferably, the intelligent contract is implemented based on Go language, and the client invoking the intelligent contract comprises the following steps:
s1: judging whether the intelligent contract is initialized or not, if so, constructing a transaction request and setting request parameters by the client, and if not, reconstructing the transaction request by the client after the client calls an Init method to initialize the intelligent contract;
s2: a client sends a transaction request to a blockchain network, an Invoke method is called by an intelligent contract, and a program logic corresponding to the request configuration is selected in the Invoke method;
s3: and judging whether the intelligent contract is correctly executed, if so, returning Success to the client, and if not, returning Error to the client, and ending the process.
Preferably, the Init method initializes the chain code and configures the attributes, and then calls these methods, and the Invoke method is a transaction request method executed in the chain code, and then calls the program according to the method name.
Preferably, the process of uploading the electronic medical record data of the patient to the block chain comprises the following steps:
s11: initializing an encryption module, distributing a secret key to a doctor, and distributing the secret key according to the attribute of the doctor;
s12: before a patient takes the electronic medical record to prepare for uploading data, encrypting the electronic medical record;
s13: uploading the encrypted data of the electronic medical record to a distributed storage system;
s14: after the encrypted electronic medical record data is transmitted to the distributed storage system, the system returns the address hash of the data storage;
s15: after acquiring the hash value in the distributed storage system, the patient uploads the electronic medical record data, the ID and the address hash to the block chain, and the patient can inquire the encrypted electronic medical record according to the ID number;
s16: according to the inquiry request of the patient, the inquiry result is returned, the doctor inquires the medical record according to the ID of the patient or the key words of the medical record, the ID inquiry can achieve the purpose of accurate inquiry, and the key words inquiry can search out the related medical record.
S17: the block chain returns a query result according to the query request, when a patient sees a doctor, the doctor needs to know the ID number of the patient, and the doctor can query the hash address in the distributed storage system according to the ID provided by the patient so as to query encrypted medical record data;
s18: the distributed storage system can inquire the encrypted data according to the hash, and then a doctor can decrypt medical record data according to the secret key of the doctor.
The invention has the beneficial effects that: the block chain system stores the personal health data in a distributed manner, and easily realizes data sharing by utilizing the characteristic advantage of decentralization; the use of the electronic medical record can lead patients to enjoy more professional personalized services, unnecessary basic examinations such as repeated blood drawing and test, CT rephotography and the like can be omitted when different hospitals see a doctor, and the treatment progress can be conveniently transmitted when the transfer treatment is carried out, so that seamless transfer treatment is realized; for doctors, the circulation and authorization of information between regional medical services are realized through the block chain, and the doctors can provide more accurate judgment for the past medical history and personal basic information of patients during diagnosis, so that the medical cost is reduced, and medical accidents are reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a block chain model diagram according to the present invention;
FIG. 3 is an architecture diagram of the electronic medical record storage system of the present invention;
FIG. 4 is a flow chart of intelligent contract execution of the present invention.
Detailed Description
Medical data mainly comprises physical examination reports, electronic medical records and health records, and is characterized by large volume and requirement of confidentiality. If all the data are stored on the block chain, the safety and the privacy of the data can be guaranteed.
As shown in fig. 1, an electronic medical record storage system based on a blockchain is divided into three major parts, namely login management, medical record management and a blockchain client. Wherein, the step of creating the medical record refers to creating the medical record for the treatment of the patient. Uploading medical records means that doctors upload created medical records to a database. Updating patient medical records refers to the system updating the unique case ID of the database into the electronic medical records that the patient stores in the blockchain. The patient medical record query refers to querying all medical records of a certain medical record, specifying a disease case, specifying more than one medical record and the like. The doctor case history inquiry refers to the inquiry of the case treatment information disclosed in the database by the doctor. Creating a login account refers to creating a login account for a new doctor or patient. User login means that a user can log in to a corresponding user system. The private key verification means that the private key of the patient needs to be effectively verified in the login process of the patient user. DES and RSA encryption refer to encrypting patient personal information using the DES algorithm, encrypting patient personal information using the RSA algorithm, and encrypting electronic medical records. DES and RSA decryption refer to decrypting patient data using the RSA algorithm to obtain an electronic medical record, and decrypting with the DES algorithm to obtain personal information of the patient. Node information configuration refers to configuring network address information for various different nodes in a blockchain network. Creating a channel refers to creating a blockchain channel. Deploying chain code refers to deploying an intelligent contract into a blockchain. Creating a query request refers to creating a query request corresponding to an intelligent contract. Sending the query request refers to sending the query request to the blockchain network.
As shown in fig. 2, the model of the blockchain is composed of a consensus layer, an application layer, a data layer, a network layer, and a contract layer, and dynamically manages the electronic medical record. Medical data mainly comes from medical records, the medical record data are packaged according to the format of a block head and a block body, then a timestamp is added, and the data are stored in a block chain for service. Data is distributed in different node data paths in a network layer through a management mechanism. In the consensus layer, nodes, including hospitals, governments, etc., are added to the blockchain and the consensus algorithm is encapsulated. In the contract layer, the medical record is mainly normalized and standardized. In the application layer, the data sharing or data information query is mainly provided for the user.
As shown in fig. 3, the architecture of the electronic medical record storage system based on the blockchain mainly comprises a Web server, a DjangoWeb server, and a database, as follows:
a first component: the system is displayed on a browser in a webpage form and serves as a display layer of the system;
and a second component: the Django Web server is characterized in that a framework of the Django Web server is composed of three layers, wherein the first layer is a template layer, the second layer is a view layer and the third layer is a model layer. The stencil layer is responsible for providing the show surface, code and decorator. The view layer is mainly responsible for calling related functions and for operating and coordinating the model layer and the template layer. The model layer is mainly responsible for the operation of the database and is connected with the database;
and (3) assembly III: and the database is mainly responsible for providing a data processing environment, and storing medical record data of the patient by using the data management capability of Mysql.
Wherein, the case history management module mainly has the following several functions:
function one: a medical record is created, and after a doctor logs in a medical record management system, the medical record can be created for a patient, wherein the content of the medical record comprises the name, the sex, the telephone number, the treatment condition of the patient and the like of the patient;
and a second function: the medical record of the patient is updated, the information of the medical record can be updated and modified after the patient goes a doctor, but the information can be updated and modified only after the authorization of the patient is obtained;
and function III: the medical records of the patient are uploaded, and the medical record information of the patient can be uploaded by a doctor after the patient goes a doctor.
In the electronic medical record storage system based on the blockchain, the intelligent contract is implemented based on the Go language, and the flow of calling the intelligent contract by the client is as follows, as shown in fig. 4:
the method comprises the following steps: judging whether the intelligent contract is initialized or not, if so, constructing a transaction request and setting request parameters by the client, and if not, reconstructing the transaction request by the client after the client calls an Init method to initialize the intelligent contract;
step two: a client sends a transaction request to a blockchain network, an Invoke method is called by an intelligent contract, and a program logic corresponding to the request configuration is selected in the Invoke method;
step three: and judging whether the intelligent contract is correctly executed, if so, returning Success to the client, and if not, returning Error to the client, and ending the process.
The Init method is used for initializing chain codes and configuring attributes, and then the methods can be called, and the Invoke method is a transaction request method executed in the chain codes and then calls a program according to a method name.
The whole process of uploading the electronic medical record data of the patient to the block chain is as follows:
the method comprises the following steps: initializing an encryption module, distributing a secret key to a doctor, and distributing the secret key according to the attribute of the doctor;
step two: before a patient takes the electronic medical record to prepare for uploading data, encrypting the electronic medical record;
step three: uploading the encrypted data of the electronic medical record to a distributed storage system;
step four: after the encrypted electronic medical record data is transmitted to the distributed storage system, the system returns the address hash of the data storage;
step five: after acquiring the hash value in the distributed storage system, the patient uploads the electronic medical record data, the ID and the address hash to the block chain, and the patient can inquire the encrypted electronic medical record according to the ID number;
step six: according to the inquiry request of the patient, returning the inquiry result, inquiring the medical record by the doctor according to the ID of the patient or the key words of the medical record, and using the ID to inquire so as to achieve the aim of accurate inquiry, and using the key words to inquire so as to search out the related medical record;
step seven: the block chain returns a query result according to the query request, when a patient sees a doctor, the doctor needs to know the ID number of the patient, and the doctor can query the hash address in the distributed storage system according to the ID provided by the patient so as to query encrypted medical record data;
step eight: the distributed storage system can inquire the encrypted data according to the hash, and then a doctor can decrypt medical record data according to the secret key of the doctor.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An electronic medical record storage system based on a block chain is characterized by comprising login management, medical record management and a block chain client;
the medical record management comprises the following steps: establishing a medical record, and establishing the medical record for the treatment of the patient by a login management client, a medical record management client and a block chain client; uploading medical records, and uploading the created medical records to a database by a doctor; updating patient medical records, and updating the unique case ID of the database to the electronic medical records of the block chain stored by the patient by the system; patient medical record inquiry, which is to inquire all medical records, appointed disease cases, medical records above appointed, and the like of a certain medical record; inquiring medical record of a doctor, wherein the doctor inquires medical treatment information disclosed in a database;
the login management comprises the following steps: creating a login account for a new doctor or patient; the user logs in, so that the user can log in a corresponding user system; the private key verification is that the private key of the patient needs to be effectively verified in the login process of the patient user; DES and RSA encryption, namely encrypting the personal information of a patient by using a DES algorithm, and encrypting the personal information of the patient and an electronic medical record by using an RSA algorithm; DES and RSA decipher, use RSA algorithm decipher patient's data to get the electronic medical record, DES algorithm decipher get patient's personal information;
the block chain client comprises: node information configuration, which is to configure network address information of various different nodes in a block chain network; creating a channel and creating a block chain channel; deploying chain codes, and deploying the intelligent contracts into the block chains; creating a query request, and creating a query request corresponding to the intelligent contract; and sending a query request to the block chain network.
2. The system according to claim 1, wherein the blockchain-based electronic medical record storage system is characterized in that the blockchain construction model includes a consensus layer, an application layer, a data layer, a network layer and a contract layer, the electronic medical record is dynamically managed, medical record data is encapsulated according to a format of a block header and a blockbody, then a timestamp is added, the data is stored in the blockchain for service, and the data is distributed in different node data paths through a management mechanism in the network layer; in the consensus layer, nodes, including hospitals, governments and the like, are added to a block chain, and a consensus algorithm is encapsulated; in a contract layer, the medical records are mainly normalized and standardized; in the application layer, data sharing or data information query is provided for users.
3. The electronic medical record storage system based on the block chain as claimed in claim 1, wherein the architecture of the storage system is established by a Web server, a Django Web server and a database; the system of the Web server is displayed on a browser in a webpage form and used as a display layer of the system; the framework of the Django Web server consists of three layers, wherein the first layer is a template layer, the second layer is a view layer and the third layer is a model layer, the template layer is responsible for providing a display surface, codes and a decoration device, the view layer is mainly responsible for calling related functions, operating and coordinating the model layer and the template layer, and the model layer is mainly responsible for operating a database and connecting the database; and the database is mainly used for providing a data processing environment, and storing medical record data of the patient by using the data management capability of Mysql.
4. The blockchain-based electronic medical record storage system according to claim 1, wherein the medical record management further comprises:
a medical record is created, and after a doctor logs in a medical record management system, the medical record can be created for a patient, wherein the content of the medical record comprises the name, the sex, the telephone number, the treatment condition of the patient and the like of the patient;
the medical record of the patient is updated, the information of the medical record can be updated and modified after the patient goes a doctor, and the updating and the modification can be performed only after the authorization of the patient is obtained;
the medical records of the patient are uploaded, and the medical record information of the patient can be uploaded by a doctor after the patient goes a doctor.
5. The electronic medical record storage system based on the block chain as claimed in claim 1, wherein the intelligent contract is implemented based on Go language, and the client invoking the intelligent contract comprises the following steps:
s1: judging whether the intelligent contract is initialized or not, if so, constructing a transaction request and setting request parameters by the client, and if not, reconstructing the transaction request by the client after the client calls an Init method to initialize the intelligent contract;
s2: a client sends a transaction request to a blockchain network, an Invoke method is called by an intelligent contract, and a program logic corresponding to the request configuration is selected in the Invoke method;
s3: and judging whether the intelligent contract is correctly executed, if so, returning Success to the client, and if not, returning Error to the client, and ending the process.
6. The system of claim 5, wherein the Init method is initializing chain code and configuring attributes, and then calls these methods, and the Invoke method is a transaction request method executed in the chain code, and then calls a program according to the method name.
7. The blockchain-based electronic medical record storage system according to claim 1, wherein the uploading of the electronic medical record data of the patient to the blockchain comprises the following steps:
s11: initializing an encryption module, distributing a secret key to a doctor, and distributing the secret key according to the attribute of the doctor;
s12: before a patient takes the electronic medical record to prepare for uploading data, encrypting the electronic medical record;
s13: uploading the encrypted data of the electronic medical record to a distributed storage system;
s14: after the encrypted electronic medical record data is transmitted to the distributed storage system, the system returns the address hash of the data storage;
s15: after acquiring the hash value in the distributed storage system, the patient uploads the electronic medical record data, the ID and the address hash to the block chain, and the patient can inquire the encrypted electronic medical record according to the ID number;
s16: according to the inquiry request of the patient, the inquiry result is returned, the doctor inquires the medical record according to the ID of the patient or the key words of the medical record, the ID inquiry can achieve the purpose of accurate inquiry, and the key words inquiry can search out the related medical record.
S17: the block chain returns a query result according to the query request, when a patient sees a doctor, the doctor needs to know the ID number of the patient, and the doctor can query the hash address in the distributed storage system according to the ID provided by the patient so as to query encrypted medical record data;
s18: the distributed storage system can inquire the encrypted data according to the hash, and then a doctor can decrypt medical record data according to the secret key of the doctor.
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