CN111312378A - Paid sharing method for medical information based on block chain - Google Patents
Paid sharing method for medical information based on block chain Download PDFInfo
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Abstract
The invention discloses a block chain-based medical information paid sharing method, which comprises the following steps: step one, medical data are broadcast and issued by hospitals; secondly, the hospital node receives the medical data transmitted by the broadcast and stores the medical data in a storage system of the hospital node; thirdly, the researcher downloads the medical data of the patient; fourthly, generating a transaction record and broadcasting the transaction record; and fifthly, packing the transaction data by each node in turn every 10 minutes to generate a new block, and connecting the new block to the tail of the existing block chain. Has the advantages that: and uploading and downloading records are stored in the block chain, so that the transaction data is real and effective and is not tampered. A large amount of idle data is effectively utilized, and medical institutions make up for deficiencies, promote each other and promote the development and progress of medical services.
Description
Technical Field
The invention relates to a medical information paid sharing method, in particular to a block chain-based medical information paid sharing method.
Background
At present, oral cancer is the 6 th common malignant tumor, and the world health organization indicates that 90% -95% of tumors can be cured if early diagnosis and timely treatment can be realized. The large number of patients places a heavy strain on the limited medical resources. The computer-aided diagnosis can help doctors to give diagnosis suggestions and prompts according to the medical examination results of patients before the doctors diagnose, so that the doctors are assisted to find tumors more timely and accurately. The computer-aided diagnosis system mentioned above is an intelligent system based on machine learning, and its accuracy depends largely on the quality and scale of the training set. At present, the number of oral hospitals is large, but the oral hospitals are independent from each other, and the number of patients in the hospitals is dispersed. The patient information of a single or a plurality of oral hospitals is not enough to reach the training sample scale of machine learning, so that the research of a computer-aided system is difficult to obtain good effect. On the other hand, the medical information belongs to the individual privacy of the patient, or the public or hidden information is decided by the patient. Meanwhile, it is difficult to provide personal medical information for scientific research voluntarily and without compensation for patients.
Disclosure of Invention
The invention aims to solve the problems of insufficient medical scientific research data and idle of a large amount of valuable data, and provides a block chain-based medical information paid sharing method.
The invention provides a block chain-based medical information paid sharing method, which comprises the following steps:
step one, medical data are broadcast and issued by hospitals;
secondly, the hospital node receives the medical data transmitted by the broadcast and stores the medical data in a storage system of the hospital node;
thirdly, the researcher downloads the medical data of the patient;
fourthly, generating a transaction record and broadcasting the transaction record;
and fifthly, packing the transaction data by each node in turn every 10 minutes to generate a new block, and connecting the new block to the tail of the existing block chain.
The first step is that the process of broadcasting and issuing medical data by the hospital is as follows:
step one, starting;
step two, carrying out desensitization treatment on the medical data of each patient, namely deleting sensitive information such as name, identification card number and address, and simultaneously replacing the sensitive information with a unique identifiable patient identification code;
step three, generating a symmetric key and a data identification code for each piece of data;
step four, the medical information data of the patient is encrypted by a symmetric key, then a patient identification code and an identification code of the data are added, and then the medical information data and the digital signature of the hospital are combined into an uploading message which is broadcasted by the hospital node;
step five, simultaneously generating an uploading action and combining the uploading action with the digital signature of the hospital node to form uploading action information, broadcasting the action information in the network by the hospital node, and simultaneously storing the action information in a storage pool of the hospital node;
and step six, ending.
The second step is that the process of receiving medical data by the nodes of the medical treatment institution is as follows:
step one, starting;
after receiving the medical data sent by other nodes, the medical institution node verifies the digital signature by using the public key of the medical data sender, if the data is not modified, the medical data still in an encrypted state is stored in a storage system of the medical institution node, otherwise, the medical institution node is discarded;
step three, storing the issuing action information of the medical data sender in a storage pool of the sender, and waiting for packaging and uploading to a block chain;
and step four, finishing.
The third step of the downloading process for the researchers is as follows:
step one, starting;
secondly, searching target data, namely medical data of a patient, in a storage system of the medical institution to which the researcher belongs;
step three, finding and downloading the target data, wherein the medical data encrypted by the symmetric key is stored in the storage system, and a researcher needs to generate data request information and send the data request information to the system;
step four, the system encrypts the symmetric key of the target data by using the public key of the researcher and then sends the encrypted symmetric key to the researcher;
after receiving the medical data, the researcher decrypts the medical data by using the private key to obtain a symmetric key of the target data, and decrypts the medical data by using the symmetric key;
step six, the system gives a certain reward score to the hospital of the medical data sender according to the data quantity provided by the medical data sender;
and seventhly, finishing.
The process of broadcasting the transaction information in the fourth step is as follows:
step one, starting;
step two, a researcher downloads and decrypts a piece of medical data of a patient to generate a piece of transaction data;
combining the transaction data and the digital signature of the hospital to which the researcher belongs to form transaction data information;
step four, the hospital node of the data receiving party stores the transaction in its own storage pool, and also broadcasts the transaction information in the network;
step five, after receiving the transaction data information, other hospital nodes verify the information by using the public key of the node sending the data, and after the verification is passed, the transaction data is stored in the storage pool of the other hospital nodes to wait for packaging and uploading;
and step six, ending.
The process of generating a new block by packing in the fifth step is as follows:
step one, starting;
step two, the hospital node which obtains the packing right adds the block head and the time stamp to the data in the storage pool according to the block format to generate a new block which is linked to the tail part of the existing block chain;
and step three, ending.
The invention has the beneficial effects that:
the medical information paid sharing method based on the block chain integrates medical data resources of hospitals in different places and even different regions, and backups the encrypted medical data resources to the storage system of each hospital, so that the scale and the integrity of the data are guaranteed, and even if the data of one medical institution is lost, the data can be retrieved from backups of other medical institutions. And uploading and downloading records are stored in the block chain, so that the transaction data is real and effective and is not tampered. The medical institution is encouraged to provide anonymous medical information by rewarding the medical institution with the value, the more times the medical data is downloaded, the more rewarding values the hospital provides, and the rewarding values can provide basis for the hospital to later win government rewards or social honor. Thus, a large amount of idle data is effectively utilized, and medical institutions make up for deficiencies, thereby promoting development and progress of medical services.
Drawings
Fig. 1 is a flow chart of medical information broadcast by a hospital of a medical data sender according to the present invention.
Fig. 2 is a block diagram of symmetrically encrypted medical data according to the present invention.
Fig. 3 is a diagram illustrating a process of generating medical data with a digital signature according to the present invention.
Fig. 4 is a diagram illustrating a process of verifying a digital signature of a hospital node according to the present invention.
Detailed Description
The invention provides a block chain-based medical information paid sharing method, wherein two roles are respectively a hospital and a researcher. The hospital regularly distributes the recently acquired patient data to the system after processing. The researchers submit the download data application in the website or mobile phone application of the hospital. The medical institution providing the data is given a reward score based on the amount of data downloaded. The reward score may serve as a support data in the hospital rating.
One node is created for each hospital participating, and the hospital distributes the acquired medical data to all medical nodes after processing ("desensitization" and encryption). Although the researcher can download the medical data from the storage system of the medical node, the researcher needs to apply the symmetric key of the data to the system for decryption. The storage pool of the node stores the release record of the medical structure and the download transaction record of the researcher. And packing the data in the storage pool by each node in turn every 10 minutes to generate a new block, and connecting the new block to the tail part of the existing block chain. The medical data is encrypted by the symmetric key before being uploaded, and the transmission of the medical data is verified by the digital signature, so that the medical data can be prevented from being illegally stolen and illegally tampered.
The method of the invention has the following specific application process:
assume Hospital A and Hospital B as nodes on the federation chain. Researcher b belongs to hospital b.
Step one, medical data are broadcast and issued by a hospital A;
and secondly, the medical node B receives the medical data transmitted by the broadcast and stores the medical data in a storage system of the medical node B.
Thirdly, downloading medical data by a researcher B;
and fourthly, generating a transaction record and broadcasting the transaction record.
And fifthly, packing the transaction data by each node in turn every 10 minutes to generate a new block, and connecting the new block to the tail of the existing block chain.
The first step is that medical data are released by the medical hospital A broadcast: as shown in fig. 1, the specific steps are as follows:
step one, starting;
and step two, carrying out desensitization treatment on the medical data of each patient, namely deleting sensitive information such as names, identification numbers, addresses and the like, and simultaneously replacing the sensitive information with a unique identifiable patient identification code.
And step three, generating a symmetric key and a data identification code for each piece of data.
Step four, encrypting the medical credit data of the patient by using a symmetric key, then attaching the patient identification code and the identification code of the data to generate symmetrically encrypted medical data, combining the symmetrically encrypted medical data and the digital signature of the hospital A into medical data with a digital signature, broadcasting the medical data with the digital signature in a network, wherein the symmetrically encrypted medical data is formed as shown in figure 2, and the process of forming the medical data with the digital signature is shown in figure 3.
And step five, simultaneously generating action information uploaded this time, combining the uploading action information and the digital signature of the hospital A into uploading action information with a digital signature, and broadcasting the uploading action information with the digital signature in the network. Upload action information content as shown in table 1, the process of forming upload action information with a digital signature is similar to the process of forming medical data with a digital signature.
And step six, ending.
TABLE 1
| Movement of | Data identification code | Patient identification code | Hospital identification code | Upload time |
| Upload to | …… | …… | …… | …… |
The second step is that the flow of receiving medical data by the department of TCM B is as follows:
step one, starting;
and step two, verifying the reliability of the medical data. After receiving the medical data with the digital signature, the hospital B firstly verifies the signature of the medical data by using a public key of a sender, namely the hospital A, if the data is not modified, the received medical data is proved to be reliable, meanwhile, the symmetrically encrypted medical data is stored in a storage system of the hospital B, otherwise, the symmetrically encrypted medical data is discarded, and the verification process is as shown in figure 4;
step three, after receiving the uploading action information with the digital signature, the hospital B firstly verifies the signature of the action information by using the public key of the hospital A, if the data is not modified, the uploading action information is stored in the storage pool of the hospital B, and the uploading action information is waited to be packaged and uploaded to the block chain.
And step four, finishing.
The third step, the downloading process for researcher B, is as follows:
step one, starting;
secondly, searching target data in a storage system of a hospital B to which the researcher B belongs;
and step three, finding the target data and downloading the target data. The medical data encrypted by the symmetric key is stored in the storage system. The researcher needs to generate data request information to send to the system, and the content of the data request information is shown in table 2.
And fourthly, the system encrypts the symmetric key of the target data by using the public key of the researcher B and then sends the encrypted symmetric key to the researcher B.
After receiving the medical data, the researcher uses a private key to decrypt the medical data to obtain a symmetric key of the target medical data, and the symmetric key is used for decrypting the medical data;
step six, according to the quantity of the downloaded data, the system sends a certain reward score to the medical data provider hospital A;
and seventhly, finishing.
TABLE 2
| Data identification code | Researcher identification code | Public key of researcher |
| …… | …… | …… |
The process of broadcasting the transaction information in the fourth step is as follows:
step one, starting;
step two, the researcher B downloads and decrypts a piece of medical data and generates a piece of transaction data information at the same time;
combining the transaction information and the digital signature of the hospital B to which the researcher B belongs into data transaction information with the digital signature;
step four, the hospital B stores the data transaction information in a storage pool of the hospital B, and then broadcasts the data transaction information with the digital signature in the network.
And step five, the hospital A receives the data transaction information with the digital signature broadcast from the hospital B, verifies the information by using the public key of the hospital B, stores the data transaction information into a storage pool of the hospital A after the verification is passed, and waits for packaging and uploading. The verification process of the data signature is similar to that of fig. 4.
And step six, ending.
The process of generating a new block by packing in the fifth step is as follows: (suppose that the turn comes to hospital and the nail is packed at this time)
Step one, starting;
step two, adding the block head and the time stamp to the data in the storage pool according to the block format by the hospital A to generate a new block, and linking the new block to the tail part of the existing block chain.
And step three, ending.
Claims (6)
1. A medical information paid sharing method based on a block chain is characterized in that: the method comprises the following steps:
step one, medical data are broadcast and issued by hospitals;
secondly, the hospital node receives the medical data transmitted by the broadcast and stores the medical data in a storage system of the hospital node;
thirdly, the researcher downloads the medical data of the patient;
fourthly, generating a transaction record and broadcasting the transaction record;
and fifthly, packing the transaction data by each node in turn every 10 minutes to generate a new block, and connecting the new block to the tail of the existing block chain.
2. The method according to claim 1, wherein the method comprises: the first step is that the process of broadcasting and issuing the medical data by the hospital is as follows:
step one, starting;
step two, carrying out desensitization treatment on the medical data of each patient, namely deleting sensitive information such as name, identification card number and address, and simultaneously replacing the sensitive information with a unique identifiable patient identification code;
step three, generating a symmetric key and a data identification code for each piece of data;
step four, the medical information data of the patient is encrypted by a symmetric key, then a patient identification code and an identification code of the data are added, and then the medical information data and the digital signature of the hospital are combined into an uploading message which is broadcasted by the hospital node;
step five, simultaneously generating an uploading action and combining the uploading action with the digital signature of the hospital node to form uploading action information, broadcasting the action information in the network by the hospital node, and simultaneously storing the action information in a storage pool of the hospital node;
and step six, ending.
3. The method according to claim 1, wherein the method comprises: the process of receiving medical data by the medical treatment mechanism nodes in the second step is as follows:
step one, starting;
after receiving the medical data sent by other nodes, the medical institution node verifies the digital signature by using the public key of the medical data sender, if the data is not modified, the medical data still in an encrypted state is stored in a storage system of the medical institution node, otherwise, the medical institution node is discarded;
step three, storing the issuing action information of the medical data sender in a storage pool of the sender, and waiting for packaging and uploading to a block chain;
and step four, finishing.
4. The method according to claim 1, wherein the method comprises: the downloading process of the researchers in the third step is as follows:
step one, starting;
secondly, searching target data, namely medical data of a patient, in a storage system of the medical institution to which the researcher belongs;
step three, finding and downloading the target data, wherein the medical data encrypted by the symmetric key is stored in the storage system, and a researcher needs to generate data request information and send the data request information to the system;
step four, the system encrypts the symmetric key of the target data by using the public key of the researcher and then sends the encrypted symmetric key to the researcher;
after receiving the medical data, the researcher decrypts the medical data by using the private key to obtain a symmetric key of the target data, and decrypts the medical data by using the symmetric key;
step six, the system gives a certain reward score to the hospital of the medical data sender according to the data quantity provided by the medical data sender;
and seventhly, finishing.
5. The method according to claim 1, wherein the method comprises: the process of broadcasting the transaction information in the fourth step is as follows:
step one, starting;
step two, a researcher downloads and decrypts a piece of medical data of a patient to generate a piece of transaction data;
combining the transaction data and the digital signature of the hospital to which the researcher belongs to form transaction data information;
step four, the hospital node of the data receiving party stores the transaction in its own storage pool, and also broadcasts the transaction information in the network;
step five, after receiving the transaction data information, other hospital nodes verify the information by using the public key of the node sending the data, and after the verification is passed, the transaction data is stored in the storage pool of the other hospital nodes to wait for packaging and uploading;
and step six, ending.
6. The method according to claim 1, wherein the method comprises: the process of generating the new block by packaging in the fifth step is as follows:
step one, starting;
step two, the hospital node which obtains the packing right adds the block head and the time stamp to the data in the storage pool according to the block format to generate a new block which is linked to the tail part of the existing block chain;
and step three, ending.
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