A blockchain-based medical data sharing method and system

Abstract

The application discloses a kind of medical data sharing method and system based on blockchain, which comprises: alliance party obtains medical data, and generates abstract information according to the medical data;Alliance party uploads the medical data and abstract information to blockchain and regulatory server;When obtaining target medical data to blockchain, demand party sends data acquisition request to blockchain;The regulatory server receives the data acquisition request sent by the demand party, sends transaction to alliance party to execute smart contract decryption data operation, and checks the decryption result of alliance party, to send target medical data to demand party after verification success.The abstract information of the present application is extracted from medical data, which realizes the effects of near processing, abstract sharing and on-demand retrieval of medical data, and the privacy of data in centralized storage is ensured by storing medical data in ciphertext form and hash checking through the regulatory server, so that it cannot be tampered with.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blockchains, and in particular to a medical data sharing method and system based on a blockchain. BACKGROUND

[0002] A blockchain can be regarded as a distributed database, and the data on the chain is maintained by each node and visible to all participants, with characteristics such as decentralization, traceability and non-tamperability. In the era of big data, the problem of medical data islands still exists. The data of medical institutions, social security agencies, research institutions, health service providers and patients cannot be effectively interconnected, shared and transmitted, which seriously hinders the progress of medical research and development. Emerging medical data sharing platforms not only make it difficult to unify data standardization, but also lead to repeated construction of system platforms and isolation between different systems.

[0003] In recent years, various parties have been trying to achieve new ways of medical data collaboration and sharing. Specifically, the first is a traditional data sharing platform, but this platform cannot guarantee data privacy and security because the data is concentrated in one place. The second is a blockchain-based data collaboration and sharing platform, in which alliance parties will rely on the data synchronization characteristics of blockchain nodes to achieve all data sharing. Although this method can ensure that data cannot be tampered with, too much data on the chain will affect sharing efficiency, node performance, and there is a storage risk. At the same time, the data shared to the chain is visible to all nodes, lacks privacy protection, and cannot guarantee data security. The third is to build an intermediate privacy computing platform, which realizes data calculation and output results on the platform by establishing an evaluation model. The advantage is that it does not need to exchange raw data, but only outputs the value of the calculated data. However, because different enterprises or institutions have different data usage needs, a large number of models need to be established, resulting in a sharp increase in costs. Secondly, because all data is stored in the privacy computing platform, there are also risks of tampering, storage and leakage. SUMMARY

[0004] The embodiments of the present application provide a medical data sharing method and system based on a blockchain, aiming to realize efficient sharing of medical data and improve the security of medical data storage.

[0005] The embodiments of the present application provide a medical data sharing method based on a blockchain, comprising:

[0006] The alliance party obtains medical data and generates summary information according to the medical data;

[0007] The alliance party uploads the medical data and summary information to the blockchain and a supervision server;

[0008] When obtaining target medical data from the blockchain, the demander sends a data acquisition request to the blockchain;

[0009] The regulatory server receives the data acquisition request sent by the demand side, sends a transaction to the alliance side to execute the smart contract to decrypt the data operation, and checks the decryption result of the alliance side, so as to send the target medical data to the demand side after the verification is successful.

[0010] Further, the alliance side obtains medical data and generates summary information according to the medical data, including:

[0011] The alliance side obtains medical data through an IoT device;

[0012] According to the preset keyword library, the keywords of the medical data are extracted, and the summary information is generated according to the keywords.

[0013] Further, the alliance side uploads the medical data and the summary information to the regulatory server in the blockchain, including:

[0014] The alliance side uses an asymmetric encryption method to encrypt the medical data and the summary information, and generates ciphertext data;

[0015] The medical data is hashed, and the hash processing result of the medical data and the summary information are transmitted through a local node to initiate a transaction, so as to upload the hash processing result of the medical data to the blockchain and upload the summary information to the ledger node of the blockchain, so that the ledger node synchronizes the summary information to all participants; Wherein, the participants include the alliance side and the demand side;

[0016] And the ciphertext data is sent to the regulatory server for storage.

[0017] Further, when obtaining target medical data from the blockchain, the demand side sends a data acquisition request to the blockchain, including:

[0018] The demand side inputs the target keyword of the target medical data on the blockchain, so that the blockchain returns a summary list associated with the target keyword; Wherein, the summary list contains at least one summary information;

[0019] Select the target summary information corresponding to the target medical data in the summary list, and send a data acquisition request to the regulatory server based on the target summary information.

[0020] Further, the regulatory server receives the data acquisition request sent by the demand side, and finds the corresponding target medical data according to the data acquisition request, and sends the target medical data to the demand side, including:

[0021] The regulatory server parses the data acquisition request after receiving the data acquisition request;

[0022] Based on the analysis result, the ciphertext data of the corresponding target medical data is extracted, a transaction is sent to the alliance party to execute a smart contract to decrypt the data operation, and the decryption result of the alliance party is checked to send the target medical data to the demand party after the checking is successful.

[0023] Further, the supervision server parses the data acquisition request after receiving the data acquisition request, including:

[0024] The supervision server traverses the local medical data list according to the data acquisition request;

[0025] According to the target abstract information, the ciphertext data of the target medical data in the local medical data list is extracted.

[0026] Further, after the supervision server receives the data acquisition request sent by the demand party, and according to the data acquisition request, the corresponding target medical data is found, and the target medical data is sent to the demand party, the step includes:

[0027] The alliance party decrypts the target medical data in the smart contract by calling the local private key, and uploads the decrypted target medical data, the data acquisition request record and the operation record as the decryption result of the smart contract to the blockchain, so that the blockchain endorses and signs the decryption result and returns the endorsement signature and the decrypted target medical data to the supervision server;

[0028] The supervision server uploads the received target medical data to the blockchain for comparison after hash processing; when the comparison is successful, the endorsement signature is verified, and after the verification is successful, the transaction is sent to the ordering node, and all data corresponding to the data acquisition request is packaged and sent to the demand party.

[0029] The embodiment of the application also provides a medical data sharing system based on a blockchain, including an alliance party, a demand party and a supervision server, wherein:

[0030] The alliance party is used for acquiring medical data, and generating abstract information according to the medical data; the medical data and the abstract information are uploaded to the blockchain and the supervision server;

[0031] The demand party is used for sending a data acquisition request to the blockchain when acquiring target medical data from the blockchain;

[0032] The supervision server is used for receiving the data acquisition request sent by the demand party, sending a transaction to the alliance party to execute a smart contract to decrypt the data operation, and checking the decryption result of the alliance party, so as to send the target medical data to the demand party after the checking is successful.

[0033] Further, the alliance party is configured to acquire medical data through the IoT device;

[0034] According to the preset keyword library, keywords are extracted from the medical data, and the summary information is generated according to the keywords.

[0035] Further, the alliance party is also configured to encrypt the medical data and the summary information by using an asymmetric encryption method to generate ciphertext data;

[0036] The medical data is subjected to hash processing, and the hash processing result of the medical data and the summary information are transmitted through a local node to initiate a transaction, so as to upload the hash processing result of the medical data to a blockchain and upload the summary information to a ledger node of the blockchain, so that the ledger node synchronizes the summary information to all participating parties; the participating parties include the alliance party and the demand party;

[0037] And the ciphertext data is sent to a supervision server for storage.

[0038] The embodiment of the application provides a medical data sharing method and system based on a blockchain, which comprises the following steps: an alliance party acquires medical data and generates summary information according to the medical data; the alliance party uploads the medical data and the summary information to a blockchain and a supervision server; when target medical data is acquired from the blockchain, a demand party sends a data acquisition request to the blockchain; the supervision server receives the data acquisition request sent by the demand party, sends a transaction to the alliance party to execute an intelligent contract to decrypt data, and checks the decryption result of the alliance party, so that the target medical data is sent to the demand party after the checking is successful. The embodiment of the application extracts the summary information of the medical data, realizes the effects of near processing, summary sharing and on-demand retrieval of the medical data, and ensures the privacy of the data in the centralized storage in the form of ciphertext storage of the supervision server, so that the data cannot be tampered with. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0040] Figure 1 A flowchart of a medical data sharing method based on a blockchain provided by the embodiment of the application is shown in the figure.

[0041] Figure 2 A network structure schematic diagram of a medical data sharing system based on a blockchain provided by the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of the present application.

[0043] It should be understood that the terms "include" and "contain" as used in the specification and the appended claims indicate the presence of the described features, integers, steps, operations, elements, and / or components but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0044] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0045] It should be further understood that the term "and / or" as used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0046] Please see Figure 1 , Figure 1 A flowchart of a medical data sharing method based on a blockchain provided by an embodiment of the present application is shown below, which specifically includes steps S101-S104.

[0047] S101, the alliance party obtains medical data and generates summary information according to the medical data;

[0048] S102, the alliance party uploads the medical data and summary information to a blockchain and a supervision server;

[0049] S103, when obtaining target medical data from the blockchain, the demander sends a data acquisition request to the blockchain;

[0050] S104, the supervision server receives the data acquisition request sent by the demander, sends a transaction to the alliance party to execute an intelligent contract to decrypt data, and checks the decryption result of the alliance party, so as to send the target medical data to the demander after the checking is successful.

[0051] In this embodiment, a supervision center is introduced as a blockchain node to build a supervision server to store all encrypted medical data. Each alliance party generates summary information of the obtained medical data and stores it on the chain and uploads it to the supervision server. When a demand party wants to obtain data (i.e., the target medical data), the supervision server sends a transaction to the alliance party to execute the smart contract to decrypt the data, and checks the decryption result of the alliance party to return the required target medical data and transaction details to the demand party after the check is successful.

[0052] In this embodiment, by extracting the summary information of the medical data, the medical data is processed nearby, shared by summary, and retrieved on demand, and the privacy of the data in centralized storage is ensured by the supervision server in the form of ciphertext storage, so that the data cannot be tampered with.

[0053] In an embodiment, the step S101 comprises:

[0054] The alliance party obtains medical data through an IoT device;

[0055] According to the preset keyword library, the keywords of the medical data are extracted, and the summary information is generated according to the keywords.

[0056] In this embodiment, the IoT device can be used for inputting medical records, terminals for entering diagnosis information, devices for x-ray detection, devices for collecting electrocardiograms, and devices for outputting blood test reports, etc.

[0057] The alliance party extracts information in the medical data according to the keyword library jointly formulated by the participants to generate corresponding summary information, for example, the keyword library corresponds to the fever in the medical data about the symptom of fever, and the keyword is extracted. When all the keywords in the medical data are extracted, the summary information of this piece of medical data is generated.

[0058] In an embodiment, the step S102 comprises:

[0059] The alliance party uses an asymmetric encryption method to encrypt the medical data and the summary information to generate ciphertext data;

[0060] The medical data is hashed, and the hash processing result of the medical data and the summary information are initiated by the local node to upload the hash processing result of the medical data to the blockchain and the summary information to the ledger node of the blockchain, so that the ledger node synchronizes the summary information to all participants; wherein the participants include the alliance party and the demand party;

[0061] And the ciphertext data is sent to the supervision server for storage.

[0062] In this embodiment, the alliance party encrypts the data to generate ciphertext data using an asymmetric encryption method, and simultaneously performs hash processing on the original medical data. Then, a transaction is initiated through a blockchain node to upload the digest information and the hash-processed medical data to the ledger of the blockchain, so that the ledger of each node of the blockchain is synchronized, thereby causing the digest information in the transaction to be added to the ledger of each node of all participants. Meanwhile, the ciphertext data is sent to the supervision server for storage. The asymmetric encryption method described in this embodiment can be a knapsack algorithm, a Rabin algorithm, a D-H algorithm, an ECC elliptic curve encryption algorithm, etc.

[0063] In an embodiment, the step S103 comprises:

[0064] The demand party inputs a target keyword of the target medical data on the blockchain, so that the blockchain returns a digest list associated with the target keyword; wherein the digest list contains at least one piece of digest information;

[0065] The target digest information corresponding to the target medical data is selected from the digest list, and a data acquisition request is sent to the supervision server based on the target digest information.

[0066] In this embodiment, when the demand party wants to acquire a specific type of medical data (i.e. the target medical data), it needs to input a keyword to search for the hash digest on the chain. The blockchain smart contract will return a digest list containing all digest information related to the input keyword according to the input keyword. Therefore, the demand party only needs to select the desired data from the returned digest list and initiate a data acquisition request to the supervision department server.

[0067] In an embodiment, the step S104 comprises:

[0068] The supervision server parses the data acquisition request after receiving the data acquisition request;

[0069] Based on the analysis result, the ciphertext data of the corresponding target medical data is extracted, a transaction is sent to the alliance party to execute the smart contract decryption data operation, and the decryption result of the alliance party is verified, so that the target medical data is sent to the demand party after the verification is successful.

[0070] Specifically, the supervision server parses the data acquisition request after receiving the data acquisition request, comprising:

[0071] The supervision server traverses the local medical data list according to the data acquisition request;

[0072] According to the target digest information, the ciphertext data of the target medical data in the local medical data list is extracted.

[0073] In this embodiment, the regulatory server parses the data acquisition request after receiving the data acquisition request, wherein the parsing refers to traversing the medical data list selected by the demand side. Then the ciphertext data of each medical data is extracted locally, the data acquisition request and the encrypted medical data are generated into a smart contract, and sent to the endorsement node which needs to decrypt the data, that is, the local blockchain node.

[0074] In an embodiment, the step S104 further comprises:

[0075] The alliance party decrypts the target medical data in the smart contract by calling the local private key, and uploads the decrypted target medical data, the data acquisition request record and the operation record as the decryption result of the smart contract to the blockchain, so that the blockchain endorses and signs the decryption result and returns the endorsement signature and the decrypted target medical data to the regulatory server;

[0076] The regulatory server hashes the received target medical data and uploads it to the blockchain for comparison; when the comparison is successful, the endorsement signature is verified, and after the verification is successful, the transaction is sent to the ordering node, and all the data corresponding to the data acquisition request is packaged and sent to the demand side.

[0077] In this embodiment, the method content in the contract is: calling the local private key to decrypt the encrypted data, and uploading the data request record, data processing record and operation record to the chain. Therefore, the endorsement node corresponding to the demand side simulates execution according to the contract method. Then the decryption result is endorsed and signed, and the decrypted target medical data is returned to the regulatory server. The regulatory server hashes the received decryption data and compares it with the on-chain hash. If they are consistent, it is determined that tampering has not occurred. Then the endorsement signature is verified. If the endorsement signature is verified correctly, the transaction is sent to the orderer (ordering) node. Then the regulatory server collects all the data and packages it and sends it to the demand side.

[0078] Figure 2 A network structure schematic diagram of a medical data sharing system 200 based on a blockchain provided by an embodiment of the present application, comprising: an alliance party 201, a demand side 202 and a regulatory server 203, wherein:

[0079] The alliance party 201 is used to acquire medical data, and generate summary information according to the medical data; upload the medical data and summary information to the blockchain and the regulatory server;

[0080] The demand side 202 is used to send a data acquisition request to the blockchain when acquiring target medical data from the blockchain;

[0081] The regulatory server 203 is configured to receive the data acquisition request sent by the demander 202, send a transaction to the alliance party 201 to execute the smart contract to decrypt the data, and check the decryption result of the alliance party 201, so as to send the target medical data to the demander 202 after the check is successful.

[0082] Further, the alliance party 201 is configured to acquire the medical data through an IoT device.

[0083] According to the preset keyword library, the keywords of the medical data are extracted, and the summary information is generated according to the keywords.

[0084] Further, the alliance party 201 is also configured to encrypt the medical data and the summary information by using an asymmetric encryption method to generate ciphertext data.

[0085] The medical data is subjected to hash processing, and the hash processing result of the medical data and the summary information are sent through a local node to initiate a transaction, so as to upload the hash processing result of the medical data to a blockchain and upload the summary information to a ledger node of the blockchain, so that the ledger node synchronizes the summary information to all participants; wherein the participants include the alliance party 201 and the demander 202.

[0086] And the ciphertext data is sent to the regulatory server 203 for storage.

[0087] Since the embodiments of the system part correspond to the embodiments of the method part, the embodiments of the system part are described in the description of the embodiments of the method part, and will not be described here.

[0088] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0089] It is further noted that the terminology "first", "second" and the like used in the specification are merely used for differentiating one entity or action from another, and do not necessarily imply any actual physical or logical relationship or order between such entities or actions. Moreover, the use of the term "including", "containing" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus that comprises a list of elements is not required to comprise only those elements but can include other elements not expressly listed or inherent to such process, method, article or apparatus. An element preceded by "comprises a..." does not, without further constraints, preclude the existence of additional identical elements in the process, method, article or apparatus that comprises the stated element.

Claims

1. A blockchain-based method for sharing medical data, characterized in that, include: The alliance acquires medical data and generates summary information based on the medical data; The alliance will upload the medical data and summary information to the blockchain and regulatory server; When requesting target medical data from the blockchain, the requesting party sends a data retrieval request to the blockchain. The monitoring server receives the data acquisition request sent by the demand party, sends the transaction to the alliance party to execute the smart contract decryption data operation, and verifies the decryption result of the alliance party. After successful verification, the target medical data is sent to the demand party. The monitoring server receives a data acquisition request from the requesting party, sends a transaction to the consortium party to execute a smart contract decryption operation, and verifies the decryption result from the consortium party. Upon successful verification, the target medical data is sent to the requesting party, including: The monitoring server parses the data acquisition request after receiving it. Based on the parsing results, the encrypted data of the corresponding target medical data is extracted, and the transaction is sent to the alliance party to execute the smart contract decryption operation. The decryption result of the alliance party is verified, and the target medical data is sent to the demand party after successful verification. The alliance member uses its local private key to decrypt the target medical data in the smart contract, and uploads the decrypted target medical data, along with the data acquisition request record and operation record, as the decryption result of the smart contract to the blockchain. The blockchain then endorses and signs the decryption result and returns the endorsement and signature, along with the decrypted target medical data, to the regulatory server. The monitoring server hashes the received target medical data and uploads it to the blockchain for comparison. If the comparison is successful, the endorsement signature is verified, and after successful verification, the transaction is sent to the sorting node, and all data corresponding to the data acquisition request is packaged and sent to the requesting party.

2. The blockchain-based medical data sharing method according to claim 1, characterized in that, The alliance party acquires medical data and generates summary information based on the medical data, including: The alliance members acquire medical data through IoT devices; Keywords are extracted from the medical data according to a pre-set keyword library, and the summary information is generated based on the keywords.

3. The blockchain-based medical data sharing method according to claim 1, characterized in that, The alliance member uploads the medical data and summary information to the monitoring server in the blockchain, including: The alliance uses an asymmetric encryption method to encrypt the medical data, generating ciphertext data; The medical data is hashed, and the hashing result and the summary information are combined and transacted through a local node to upload the hashing result to the blockchain and the summary information to the ledger node of the blockchain. The ledger node then synchronizes the summary information to all participants, including consortium members and demanders. And send the encrypted data to the monitoring server for storage.

4. The blockchain-based medical data sharing method according to claim 1, characterized in that, When retrieving target medical data from the blockchain, the requesting party sends a data retrieval request to the blockchain, including: The demand side inputs target keywords of target medical data into the blockchain, so that the blockchain returns a list of summaries associated with the target keywords; wherein, the list of summaries contains at least one summary. Select the target summary information corresponding to the target medical data from the summary list, and send a data acquisition request to the monitoring server based on the target summary information.

5. The blockchain-based medical data sharing method according to claim 4, characterized in that, After receiving the data acquisition request, the monitoring server parses the data acquisition request, including: The monitoring server iterates through the local medical data list based on the data retrieval request. Extract the encrypted data of the target medical data from the local medical data list based on the target summary information.

6. A blockchain-based medical data sharing system, characterized in that, include: Alliance members, demanders, and regulatory servers, among which: The alliance member is used to acquire medical data and generate summary information based on the medical data; the medical data and summary information are then uploaded to the blockchain and the regulatory server. The demand side is used to send a data acquisition request to the blockchain when it needs to obtain target medical data. The monitoring server is used to receive data acquisition requests from the demand side, send transactions to the alliance party to execute smart contract data decryption operations, and verify the decryption results of the alliance party. After successful verification, the target medical data is sent to the demand side. The monitoring server receives a data acquisition request from the requesting party, sends a transaction to the consortium party to execute a smart contract decryption operation, and verifies the decryption result from the consortium party. Upon successful verification, the target medical data is sent to the requesting party, including: The monitoring server parses the data acquisition request after receiving it. Based on the parsing results, the encrypted data of the corresponding target medical data is extracted, and the transaction is sent to the alliance party to execute the smart contract decryption operation. The decryption result of the alliance party is verified, and the target medical data is sent to the demand party after successful verification. The alliance member uses its local private key to decrypt the target medical data in the smart contract, and uploads the decrypted target medical data, along with the data acquisition request record and operation record, as the decryption result of the smart contract to the blockchain. The blockchain then endorses and signs the decryption result and returns the endorsement and signature, along with the decrypted target medical data, to the regulatory server. The monitoring server hashes the received target medical data and uploads it to the blockchain for comparison. If the comparison is successful, the endorsement signature is verified, and after successful verification, the transaction is sent to the sorting node, and all data corresponding to the data acquisition request is packaged and sent to the requesting party.

7. The blockchain-based medical data sharing system according to claim 6, characterized in that, The alliance member is used to acquire medical data through IoT devices; Keywords are extracted from the medical data according to a pre-set keyword library, and the summary information is generated based on the keywords.

8. The blockchain-based medical data sharing system according to claim 7, characterized in that, The alliance party is also used to encrypt the medical data using an asymmetric encryption method to generate ciphertext data; The medical data is hashed, and the hashing result and the summary information are combined and transacted through a local node to upload the hashing result to the blockchain and the summary information to the ledger node of the blockchain. The ledger node then synchronizes the summary information to all participants, including consortium members and demanders. And send the encrypted data to the monitoring server for storage.

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