WO2019232946A1

WO2019232946A1 - Method for recording medical data, system, computer apparatus, and storage medium

Info

Publication number: WO2019232946A1
Application number: PCT/CN2018/103934
Authority: WO
Inventors: 张爽; 王义文; 王健宗; 肖京
Original assignee: 平安科技（深圳）有限公司
Priority date: 2018-06-04
Filing date: 2018-09-04
Publication date: 2019-12-12
Also published as: CN109194702A; CN109194702B

Abstract

The present application relates to the technical field of data processing, and particularly relates to a method for recording medical data, a system, a computer apparatus, and a storage medium. The method for recording bone medical data comprises: a blockchain system establishing a P2P network in a network layer, and configuring an arbitrary computer in a medical institution as a node in the P2P network; the blockchain system encapsulating a consensus mechanism in a consensus layer, and selecting a pre-determined number of nodes by means of the consensus mechanism, wherein the selected nodes acquire a turn-taking ledger permission according to a pre-determined timetable; upon acquisition of the turn-taking ledger permission, a node establishing a new data block, recording medical data in the new data block, and linking, by means of a chain structure of the blockchain system, the new data block and a previous data block, so as to form a new blockchain. The present application utilizes the distributed ledger technique and decentralization in the blockchain technology, thereby realizing digital, transparent, and convenient medical data management, and providing better services to individuals and medical institutions.

Description

Medical data recording method, system, computer equipment and storage medium

This application claims priority from a Chinese patent application filed on June 04, 2018 with the Chinese Patent Office, application number 201810561627.2, and the invention name is "medical data recording method, system, computer equipment, and storage medium", the entire contents of which are incorporated by reference. Incorporated in this application.

Technical field

The present application relates to the field of data processing technology, and in particular, to a medical data recording method, system, computer device, and storage medium.

Background technique

Physical and medical data are very important private information for individuals in modern society, such as fingerprints or iris, which are unique and unique "body codes." Therefore, it is very important to keep personal medical records, identity characteristics and other information strictly confidential. However, traditional centralized databases and even file cabinets are likely to cause personal health data to be leaked to the Internet due to network operation errors, hacking, etc. Of medical information is threatened. At the same time, smart medical devices that can be used for digital medical records cannot provide hospitals and doctors with up-to-date and reliable patient information in an emergency.

Therefore, traditional digital medical data has a problem that information is threatened after medical data is leaked, and doctors or hospitals cannot obtain the latest and most reliable information of patients.

Summary of the Invention

In view of this, it is necessary to provide a medical data recording method, system, computer equipment, and storage medium in response to the problems of existing information security and untimely access to existing traditional digital medical data.

A medical data recording method includes the following steps:

The blockchain system establishes a P2P network at the network layer, and sets any computer in the medical institution that applies to record medical data information as a node in the P2P network;

The blockchain system encapsulates a consensus mechanism at the consensus layer, and a preset number of nodes are selected through the consensus mechanism, and the selected nodes obtain a right to rotate bookkeeping rights according to a preset schedule, and the bookkeeping is to record medical treatment Data information process;

After the node obtains the right to take turns in accounting, it receives the medical data information sent by the consensus mechanism, establishes a new data block, records the medical data information into the new data block, and passes the area The chain structure of the block chain system links the new data block to the previous data block to form a new block chain.

A medical data recording system includes:

Establish a P2P network unit, set up as a blockchain system to establish a P2P network at the network layer, and set any computer in the medical institution that applies to record medical data information as a node in the P2P network;

The node selection unit is set to encapsulate the consensus mechanism of the blockchain system at the consensus layer, and a preset number of nodes are selected through the consensus mechanism, and the selected nodes obtain the right of rotating bookkeeping according to a preset schedule. Recounting is the process of recording medical data information;

The node accounting unit is configured to receive the medical data information sent by the consensus mechanism after the node obtains the accounting rights in turn, establish a new data block, and record the medical data information into the new data block. And through the chain structure of the blockchain system, the new data block is linked to the previous data block to form a new blockchain.

A computer device includes a memory and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor causes the processor to perform the following steps:

The blockchain system encapsulates a consensus mechanism in a consensus layer, and a preset number of nodes are filtered through the consensus mechanism, and the selected nodes obtain a right to rotate bookkeeping rights according to a preset schedule, and the bookkeeping is The process of recording medical data;

A storage medium storing computer-readable instructions. When the computer-readable instructions are executed by one or more processors, the one or more processors execute the following steps:

The above-mentioned medical data recording method, device, computer equipment and storage medium, including a blockchain system, establish a P2P network at the network layer, and set any computer in the medical institution that applies to record medical data information as a node in the P2P network; area The blockchain system encapsulates the consensus mechanism in the consensus layer, and selects a preset number of nodes through the consensus mechanism. The selected nodes obtain the right to rotate accounting according to a preset schedule, and the accounting is the process of recording medical data information; the node obtains After taking turns to book rights, receive the medical data information sent by the consensus mechanism, establish a new data block, record the medical data information into the new data block, and link the new data block through the chain structure of the blockchain system Go to the previous data block to form a new blockchain. This technical solution uses the distributed ledger technology of blockchain technology to decentralize, and each computer in the network can dynamically adjust medical data information to realize digitalization, transparency and convenience of medical treatment, and better serve individuals and medical related institutions. .

BRIEF DESCRIPTION OF THE DRAWINGS

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the detailed description of the preferred embodiments below. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present application.

FIG. 1 is a flowchart of a medical data recording method according to an embodiment of the present application;

FIG. 2 is a flowchart of steps for selecting nodes in this application;

FIG. 3 is a flowchart of a node accounting step of the application;

4 is a schematic structural diagram of a data block of the present application;

5 is a flowchart of a data broadcast verification step of the present application;

FIG. 6 is a structural diagram of a medical data recording system in an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution, and advantages of the present application clearer, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms "a", "an", "the" and "the" may include plural forms. It should be further understood that the word "comprising" used in the specification of the present application refers to the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof.

FIG. 1 is a flowchart of a medical data recording method according to an embodiment of the present application. As shown in FIG. 1, a medical data recording method includes:

Step S1: Establish a P2P network: The blockchain system establishes a P2P network at the network layer, and sets any computer in the medical institution that applies to record medical data information as a node in the P2P network.

Blockchain system is a system based on blockchain technology, also known as distributed ledger technology, which is an Internet database technology. Its characteristics are decentralized, open and transparent, allowing everyone to participate in maintaining database records. Blockchain system mainly includes network layer, consensus layer and data layer. Blockchain system is a new application mode of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. Among them, the consensus mechanism is a mathematical algorithm for establishing trust and obtaining rights between different nodes in a blockchain system. The blockchain used to store data is a chain data structure that combines data blocks in a sequential manner in a chronological order, and it is a cryptographically guaranteed tamper-proof and unforgeable distributed ledger. . Therefore, in this step, the blockchain technology can be used to achieve distributed records and distributed storage of data information. The so-called distributed records can be collectively recorded by any computer in a medical institution as a node instead of a centralized institution. For recording, the so-called distributed storage is that data can be stored in all participating nodes, rather than centralized storage in centralized institutional nodes.

This step uses the P2P network networking method to make the network layer of the blockchain system decentralized. Any computer in many medical institutions that wants to apply for recording medical data information is used as a node to form a P2P network, and each node They interact through a flat topology. In this step, the computers in the medical institution capable of setting up a server and participating in accounting are nodes. In such a networking mode, each node has equal status, and there is no centralized hierarchical structure. Each node will participate in the process of verifying information and disseminating information equally.

Step S2, screening nodes: The blockchain system encapsulates the consensus mechanism in the consensus layer, and selects a preset number of nodes through the consensus mechanism. The selected nodes obtain the right to take turns in bookkeeping according to a preset schedule, and the bookkeeping is used to record medical records. The process of data information.

The consensus mechanism is the core technology of the blockchain. The consensus mechanism determines which node in the P2P network performs accounting, and the accounting decision method will affect the security and reliability of the entire blockchain system. The consensus mechanism in this step screens out the preset 101 medical institutions, and the medical data information that needs to be recorded can be obtained by edge computing. The top 101 medical institutions that have been screened out have the right to take turns in accounting according to a timetable such as 10 seconds to 30 seconds.

Step S3: Node accounting: After the node obtains the right to take turns in accounting, the node receives the medical data information sent by the consensus mechanism, establishes a new data block, records the medical data information into the new data block, and passes the chain of the blockchain system. The new data block is linked to the previous data block to form a new block chain.

The data layer of the blockchain system encapsulates the chain structure of the underlying data blocks, as well as related asymmetric public and private key data encryption algorithms and time stamps. This is the lowest data structure in the entire blockchain system. After a node obtains the right to take turns in accounting, it receives medical data information including hospitalization records, prescriptions, and pictures. After establishing a new data block, it is stored in a chain structure as the data layer information of the blockchain system.

In this embodiment, a blockchain system is established based on a P2P network, the network layer of the blockchain system is decentralized, the data layer of the blockchain system stores medical data information, and the consensus layer of the blockchain system verifies data consensus, thereby Dynamically adjust medical data information to realize digital, transparent and convenient medical treatment, and better serve individuals and medical-related institutions.

In one embodiment, each node in the P2P network interacts through a flat topology.

A P2P network is a peer-to-peer computer network. It is a distributed application architecture that distributes tasks and workloads between peers. Participants in the network, that is, nodes share some of their hardware resources. , Including processing capabilities, storage capabilities, network connection capabilities, printers, etc. These shared resources provide services and content through the network and can be directly accessed by other peer nodes without going through intermediate entities. Participants in this P2P network are both providers of resources, services, and content, and acquirers of resources, services, and content. The flat topology is a secondary network architecture where the nodes proposed in the traditional three-layer network architecture are directly connected to the service provider, which fully meets the interaction requirements of P2P networks.

In this embodiment, the nodes use a flat topology to interact with each other, which can greatly reduce the complexity of the network. In the P2P network environment of this application, the computers of the medical institution are in an equal position. Each computer has The same function, no distinction between master and slave, a computer can serve as a server, set shared resources for use by other computers in the network, and can also be used as a workstation. There is no dedicated workstation in the entire P2P network, achieving the purpose of decentralization .

In one embodiment, as shown in FIG. 2, in step S2, the screening node includes:

In step S201, the DPoS consensus mechanism is adopted: The consensus mechanism adopts the DPoS consensus mechanism, and the DPoS consensus mechanism is set to select a preset number of nodes.

The DPoS consensus mechanism (share authorization certificate mechanism) is based on the principle of allowing everyone who holds BitShares to vote, resulting in 101 representatives, that is, 101 nodes. The rights of the 101 nodes are completely equal to each other. When the DPoS consensus mechanism works specifically, a small group of nodes is selected from time to time through different strategies. The selected small group of nodes does new block creation, verification, signature, and mutual supervision, which greatly reduces the number of blocks. The time and computing power required to create and confirm. In this step, the computers of 101 medical institutions are selected as the preset number of nodes by using the DPoS consensus mechanism.

Step S202, voting and screening of nodes: nodes in the P2P network register on the blockchain system and accept votes from other nodes. After receiving the votes of all nodes, the consensus mechanism records the number of votes of the nodes and obtains the highest number of votes. Set the number of nodes will get the right to take turns accounting.

When a node is registered, that is, the public key is registered on the blockchain system, and then the consensus mechanism of the blockchain system allocates a 32-bit identifier to the registered node, and this identifier is used as the unique code of the node. After registration, nodes can either vote for other nodes or receive votes from other nodes. Record the number of votes of each node through the consensus mechanism, arrange the number of votes from high to low, and obtain the right to take turns in accounting for the nodes that ranked the top 101.

In step S203, the accounting is performed in turn: the selected nodes obtain the right to rotate in accordance with a preset schedule, and the consensus mechanism sends the medical data information to the selected nodes in turn according to the preset schedule.

The preset schedule may be to sequentially send medical data information to 101 nodes in a time period of 10 seconds, 20 seconds, or 30 seconds. A certain node that has obtained the right to take turns in accounting. When establishing a new data block, the consensus mechanism records the recording time of the new data block. The time period from the establishment of the new data block to the broadcast of the entire network exceeds 10 seconds, 20 seconds, or 30 seconds. At that time, it is considered that the node that has obtained the right to take turns in accounting has missed the right to record a new data block, and the consensus mechanism sends this medical data information to the next node that has obtained the right to take turns in accounting instead of completing the accounting.

In this embodiment, the nodes in the P2P network are screened, allocated, and monitored through the DPoS consensus mechanism, which can greatly reduce the time and computing power costs required for block creation and confirmation.

In one embodiment, as shown in FIG. 3, in step S3, the node accounting includes:

Step S301, establishing a new data block: After the node obtains the medical data information, it creates a new data block. The new data block includes a block header and a block body. The block header records the Merkle root of the previous block and the Merkle of the current block. Root and timestamp. The block body records medical data information. The timestamp is the time when the new data block was created.

As shown in Figure 4, each data block contains a block header and a block body. The block header contains the Merkle root of the previous block, the Merkle root of the current block, the timestamp, the hash value of the Merkle root, and the block. Medical data recorded in the body.

In step S302, the Merkle root of the current block is recorded: the node calculates the medical data information obtained by the Merkle root hash function to generate a unique Merkle root record in the Merkle root of the current block of the block header.

The Merkle tree is an important part of the blockchain system, and its role is to organize medical data information that has been calculated into hash values according to a binary tree structure. The generation process of the Merkle tree is: grouping medical data information into a hash function calculation, putting back the new hash value, and then taking out 2 data again for calculation, and recursing until the only Merkle root is left. This step uses the advantages of the Merkle tree, that is, good scalability, regardless of the medical data information, a Merkle tree can be generated. In addition, the time complexity of the search algorithm is very low, and it is easy to find the Merkle root from the underlying traceability to check whether the accounting exists or is legal, which greatly reduces the resource occupation during the operation. In this step, a unique Merkle root is generated by applying a generation rule of the Merkle tree and calculated by a hash function to the Merkle root of the current block in the block header, and this unique Merkle root is used as the unique identifier of the current block.

In step S303, the block is recorded: the node encrypts the medical data information by using an asymmetric encryption algorithm, and records it into the block.

The asymmetric encryption algorithm in this step can use the following algorithms:

(1) Choose two different large prime numbers p and q;

(2) Calculate the product of large primes n = pq and Φ (n) = (p-1) (q-1);

(3) Select a random integer e greater than 1 and smaller than Φ (n), so that the greatest common divisor gcd (e, Φ (n)) = 1;

(4) Calculate d such that d × e = 1 modΦ (n) (that is, d × e modΦ (n) = 1);

(5) For each key k = (n, p, q, d, e), define the encryption transformation as Ek (x) = xemod modn, and the decryption transformation as Dk (x) = ydmod modn;

(6) p, q is destroyed, with {e, n} as the public key and {d, n} as the private key, where the public key is set to encryption and the private key is set to decrypt.

In this step, the node uses the {e, n} public key to encrypt the medical data information and records it in the block to ensure the security and reliability of the data.

In step S304, a new blockchain is formed: the node that has obtained the right to bookkeeping links the current block to the previous block through a chain structure, and records the Merkle root of the previous block, resulting in the formation of a new blockchain .

In this step, the current block is linked to the existing blockchain, and the medical data information will be permanently stored. Unless more than 51% of the nodes in the blockchain system can be controlled at the same time, a single node will access the database. The modification is invalid, so the stability and reliability of medical data information in the entire blockchain is extremely high.

In this embodiment, the Merkle root of the current block is generated by calculating a hash function of the medical data information, and the asymmetric encryption algorithm for the medical data information is recorded in the block body to form a new data block and linked to the blockchain In this way, each node can achieve the purpose of accounting, each node has the same rights, and a decentralized accounting model ensures the stability and security of medical data information on the blockchain.

In one embodiment, as shown in FIG. 1, the node links the new data block to the previous data block to form a new block chain, and further includes step S4, data broadcast verification:

The node that generates the data block broadcasts the verification message to other nodes in the P2P network. The other nodes in the P2P network perform data verification on the new data block and notify the consensus mechanism of the verification result. All verifications received by the consensus mechanism When the results are all valid, all nodes in the P2P network are considered to recognize the new data block as being linked in the blockchain. When all the verification results received by the consensus mechanism are invalid, the new data block is considered invalid and will be removed from It is removed from the blockchain, and the medical data information corresponding to this new data block is sent to the next node that receives the right to take turns to perform accounting.

The verification message in this step refers to the message of the new data block generated. After other nodes receive this message, the new data block is verified by the Merkle root to verify the data. The specific verification process is shown in Figure 5. Proceed as follows:

Step S401, broadcasting one by one: When a node that obtains the right to take turns accounting, broadcasts the verification message to other nodes in the P2P network, it broadcasts it to neighboring nodes one by one. The verification message is the data information of the block header of the new data block. .

Because each node adopts the P2P network networking mode, it can be based on the P2P network, and the nodes broadcast the verification message to each adjacent node.

Step S402, the node verifies the validity: After any node receives the verification message from the neighboring node, it verifies the validity of the data structure and syntax specifications of the new data block. When the verification is valid, the verification message is continued to the neighboring node. Broadcast, when the verification message is invalid, the node does not forward the verification message.

In this step, when the node verifies the new data block, the node does not need to save all the blockchain data, it only needs to save the block header containing the new data block to be verified, including the Merkle root of the current block. Find the Merkle root of the new data block through the underlying traceability to verify whether the data exists or is valid. During specific verification, it is determined whether the data structure and syntax specifications of the Merkle root of the current block conform to the unique Merkle root of a Merkle tree.

In this step, the broadcasted nodes in the P2P network refer to a preset number of nodes screened by the consensus mechanism, that is, the 101 nodes that have been selected to obtain the right to take turns accounting. The unscreened nodes are not authorized to verify the new data area. Blocks to reduce the time and computing power required to create and confirm blocks.

In this embodiment, by adding a data broadcast verification step, each newly generated data block is recognized by other nodes in the P2P network and then linked to the blockchain, so that all nodes have fair accounting and Supervision rights further ensure the security and reliability of all data blocks on the blockchain.

In one embodiment, a medical data recording system is proposed, as shown in FIG. 6, including:

The screening node unit is set as a blockchain system that encapsulates the consensus mechanism at the consensus layer. A predetermined number of nodes are selected through the consensus mechanism. The selected nodes obtain the right to take turns to book according to a preset schedule. Data information process;

The node accounting unit is set to receive the medical data information sent by the consensus mechanism after the node obtains the right to take turns in accounting, establish a new data block, record the medical data information into the new data block, and pass the chain of the blockchain system. The new data block is linked to the previous data block to form a new block chain.

In one embodiment, the consensus mechanism adopts the DPoS consensus mechanism, and the DPoS consensus mechanism is set to select a preset number of nodes, and the screening node unit further includes:

The voting screening module is set up so that nodes in the P2P network register on the blockchain system and accept votes from other nodes. After receiving the votes of all nodes, the consensus mechanism records the number of votes of the nodes and presets the highest number of votes. The number of nodes will get the right to take turns in accounting;

The rotation bookkeeping module is configured to obtain the right of bookkeeping by the selected nodes according to a preset schedule, and the consensus mechanism sends medical data information to the selected nodes in turn according to a preset schedule.

In one embodiment, the node accounting unit includes:

Establish a new data block module. Set the node to obtain medical data information and then create a new data block. The new data block includes the block header and the block body. The block header records the Merkle root of the previous block and the Merkle of the current block. Root, timestamp, block body records medical data information, timestamp is the time when new data block was created;

The Merkle root module is recorded, and the node is set to generate the unique Merkle root record from the medical data obtained by the Merkle root through the hash function of the Merkle root and record it into the Merkle root of the current block in the block header;

Record block module, set as a node to encrypt medical data information by asymmetric encryption algorithm and record it in the block;

A new blockchain module is formed, and the node is set to link the current block to the previous block through a chain structure, and the Merkle root of the previous block is recorded, resulting in the formation of a new blockchain.

In one embodiment, the method further includes a verification broadcast unit. The node is configured to link a new data block to a previous data block to form a new blockchain, and the node that generates the data block broadcasts a verification message to the P2P. Other nodes in the network, other nodes in the P2P network perform data verification on the new data block, and notify the consensus mechanism of the verification result. When all verification results received by the consensus mechanism are valid, all nodes in the P2P network are considered to be When the new data block is recognized to be linked in the blockchain, when all the verification results received by the consensus mechanism are invalid, the new data block is considered invalid, it is removed from the blockchain, and the new data block corresponds to The medical data information is sent to the next node that obtains the right to take turns to perform accounting.

In one embodiment, the verification broadcast unit further includes:

One-by-one broadcasting module, when the node set to obtain the right to take turns accounting, broadcasts the verification message to other nodes in the P2P network, and broadcasts it to neighboring nodes one by one. The verification message is the data information of the block header of the new data block. ;

The validity verification module is configured to verify the validity of the data structure and syntax specifications of the new data block after any node receives the verification message from the neighboring node. When the verification is valid, the verification message is continued to the neighboring node. Broadcast. When the verification message is invalid, the node does not forward the verification message.

The broadcasted nodes in the P2P network refer to a preset number of nodes screened by the consensus mechanism. Unscreened nodes are not authorized to verify new data blocks to reduce the time and computing power required to create and confirm blocks. .

In one embodiment, a computer device is provided, which includes a memory and a processor. The memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the processor is caused to implement the foregoing when the computer-readable instructions are executed. The steps in the medical data recording method in the embodiment.

In one embodiment, a storage medium storing computer-readable instructions is provided. When the computer-readable instructions are executed by one or more processors, the one or more processors are caused to execute the medical data records in the foregoing embodiments. Steps in the method.

A person of ordinary skill in the art may understand that all or part of the steps in the various methods of the foregoing embodiments may be implemented by a program instructing related hardware. The program may be stored in a computer-readable storage medium. The storage medium may include: Read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks, etc.

The technical features of the embodiments described above can be arbitrarily combined. In order to simplify the description, all possible combinations of the technical features in the above embodiments have not been described. However, as long as there is no contradiction in the combination of these technical features, It should be considered as the scope described in this specification.

The above-mentioned embodiments only express some exemplary embodiments of the present application, and their descriptions are more specific and detailed, but cannot be understood as a limitation on the scope of the patent of the present application. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of this application patent shall be subject to the appended claims.

Claims

A medical data recording method includes:

The blockchain system establishes a P2P network at the network layer, and sets any computer in the medical institution that applies to record medical data information as a node in the P2P network;

The blockchain system encapsulates a consensus mechanism in a consensus layer, and a preset number of nodes are filtered through the consensus mechanism, and the selected nodes obtain a right to rotate bookkeeping rights according to a preset schedule, and the bookkeeping is The process of recording medical data;

After the node obtains the right to take turns in accounting, it receives the medical data information sent by the consensus mechanism, establishes a new data block, records the medical data information into the new data block, and passes the area The chain structure of the block chain system links the new data block to the previous data block to form a new block chain.
The medical data recording method according to claim 1, wherein each node in the P2P network interacts through a flat topology.
The medical data recording method according to claim 1, wherein the consensus mechanism adopts a DPoS consensus mechanism, and the DPoS consensus mechanism is set to select a preset number of nodes;

The nodes in the P2P network are registered on the blockchain system and accept the votes of other nodes. After receiving the votes of all nodes, the consensus mechanism records the number of votes of the nodes and presets the highest number of votes. The number of nodes will get the right to take turns in accounting;

The selected nodes obtain the right of bookkeeping in turn according to the preset schedule, and the consensus mechanism sends the medical data information to the selected nodes in turn according to the preset schedule.
The medical data recording method according to claim 1, wherein after the node obtains the right to take turns to record, recording the medical data information into the new data block to form a new block chain comprises:

After the node obtains the medical data information, the new data block is created. The new data block includes a block header and a block body, and the block header records a Merkle root of a previous block and a current block of the current block. Merkle root, timestamp, the block records the medical data information, and the timestamp is the time when the new data block was established;

Calculating, by the node, the obtained medical data information through a hash function of the Merkle root to generate a unique Merkle root record into the Merkle root of the current block of the block header;

The node encrypts the medical data information by an asymmetric encryption algorithm, and records the medical data information into the block body;

The node uses a chain structure to link the current block to the previous block and records the Merkle root of the previous block, resulting in the formation of a new block chain.
The medical data recording method according to claim 1, wherein the node links the new data block to a previous data block to form a new block chain, and the node that generates the data block A verification message is broadcast to other nodes in the P2P network. The other nodes in the P2P network perform data verification on the new data block, and notify the consensus mechanism of the verification result. When the verification results are all valid, it is considered that all nodes in the P2P network recognize that the new data block is linked in the blockchain, and when all verification results received by the consensus mechanism are invalid, the said The new data block is invalid, the new data block is removed from the blockchain, and the medical data information corresponding to the new data block is sent to the next node that obtains the right to take turns to perform accounting. .
The medical data recording method according to claim 5, wherein when the node that obtains the right to take turns accounting, broadcasts the verification message to other nodes in the P2P network, it broadcasts to neighboring nodes one by one, wherein the The verification message is data information of a block header of the new data block;

After any node receives the verification message from a neighboring node, it verifies the validity of the data structure and syntax specifications of the new data block. When the verification is valid, the verification message is continuously broadcast to the neighboring nodes. When the verification message is invalid, the node does not perform the operation of forwarding the verification message;

The broadcasted nodes in the P2P network refer to a preset number of nodes screened by the consensus mechanism, and the unscreened nodes are not authorized to verify the new data block to reduce the consumption required for block creation and confirmation. Cost of time and computing power.
A medical data recording system includes:

Establish a P2P network unit and set it to establish a P2P network at the network layer of the blockchain system, and set any computer in the medical institution that applies to record medical data information as a node in the P2P network;

The node selection unit is set to encapsulate the consensus mechanism of the blockchain system at the consensus layer, and a preset number of nodes are selected through the consensus mechanism, and the selected nodes obtain the right of rotating bookkeeping according to a preset schedule. Recounting is the process of recording medical data information;

The node accounting unit is configured to receive the medical data information sent by the consensus mechanism after the node obtains the accounting rights in turn, establish a new data block, and record the medical data information to the new data block. The new data block is linked to the previous data block through the chain structure of the blockchain system to form a new block chain.
The medical data recording system according to claim 7, wherein each node in the P2P network interacts through a flat topology.
The medical data recording system according to claim 7, wherein the consensus mechanism adopts a DPoS consensus mechanism, and the DPoS consensus mechanism is set to select a preset number of nodes;

The screening node unit further includes:

The voting screening module is set up so that nodes in the P2P network register on the blockchain system and accept votes from other nodes. The consensus mechanism records the number of votes of the nodes and receives votes after receiving votes from all nodes The highest number of previously preset nodes will get the right to take turns to book;

The bookkeeping module is configured to obtain the right of bookkeeping by the selected nodes according to the preset timetable, and the consensus mechanism sends the medical data information to the screeners in turn according to the preset timetable. The nodes.
The medical data recording system according to claim 7, wherein the node accounting unit comprises:

A new data block module is set up to set up the new data block after the node obtains the medical data information, the new data block includes a block header and a block body, and the block header records the previous area A Merkle root of a block, a Merkle root of a current block, and a timestamp, the block body records the medical data information, and the timestamp is a time when the new data block is established;

The Merkle root module is recorded, and the node is configured to generate the unique Merkle root recorded by the node through calculation of the Merkle root hash function into the Merkle root of the current block of the block header;

The block recording module is configured so that the node encrypts the medical data information by an asymmetric encryption algorithm, and records the block into the block;

A new blockchain module is formed, and the node is set to link the current block to the previous block through a chain structure, and record the Merkle root of the previous block, resulting in the formation of a new blockchain.
The medical data recording system according to claim 7, further comprising a verification broadcasting unit: configured to link the new data block to the previous data block by the node, form a new block chain, and generate a new data block. The node of the data block broadcasts a verification message to other nodes in the P2P network, and the other nodes in the P2P network perform data verification on the new data block, and notify the consensus mechanism of the verification result When all the verification results received by the consensus mechanism are valid, it is considered that all nodes in the P2P network recognize that the new data block is linked in the blockchain, and all the nodes received by the consensus mechanism When the verification result is invalid, the new data block is considered invalid, the new data block is removed from the blockchain, and the medical data information corresponding to the new data block is sent to the next one to obtain a rotation record The right to book accounts.
The medical data recording system according to claim 11, wherein the verification broadcasting unit further comprises:

One-by-one broadcasting module, the node set to obtain the right of bookkeeping in turn, when broadcasting the verification message to other nodes in the P2P network, broadcasts to the neighboring nodes one by one, wherein the verification message is the new data Data information of the block header of the block;

The verification validity module is configured to verify the validity of the data structure and syntax specifications of the new data block after any node receives the verification message from a neighboring node. When the verification is valid, the verification message is sent to The neighboring nodes continue to broadcast. When the verification message is invalid, the node does not forward the verification message.

The broadcasted nodes in the P2P network refer to a preset number of nodes screened by the consensus mechanism, and the unscreened nodes are not authorized to verify the new data block to reduce the consumption required for block creation and confirmation. Cost of time and computing power.
A computer device includes a memory and a processor. The memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the processor causes the processor to perform the following steps:

The blockchain system establishes a P2P network at the network layer, and sets any computer in the medical institution that applies to record medical data information as a node in the P2P network;

The blockchain system encapsulates a consensus mechanism in a consensus layer, and a preset number of nodes are filtered through the consensus mechanism, and the selected nodes obtain a right to rotate bookkeeping rights according to a preset schedule, and the bookkeeping is The process of recording medical data;

After the node obtains the right to take turns in accounting, it receives the medical data information sent by the consensus mechanism, establishes a new data block, records the medical data information into the new data block, and passes the area The chain structure of the block chain system links the new data block to the previous data block to form a new block chain.
The computer device according to claim 13, wherein the consensus mechanism adopts a DPoS consensus mechanism, and the DPoS consensus mechanism is set to select a preset number of nodes;

When screening a preset number of nodes through the DPoS consensus mechanism, the processor is further caused to perform the following steps:

The nodes in the P2P network are registered on the blockchain system and accept the votes of other nodes. After receiving the votes of all nodes, the consensus mechanism records the number of votes of the nodes and presets the highest number of votes. The number of nodes will get the right to take turns in accounting;

The selected nodes obtain the right of bookkeeping in turn according to the preset schedule, and the consensus mechanism sends the medical data information to the selected nodes in turn according to the preset schedule.
The computer device according to claim 13, wherein, after the node obtains the right of taking turns in accounting, the node further causes the processor to perform the following steps:

After the node obtains the medical data information, the new data block is created. The new data block includes a block header and a block body, and the block header records a Merkle root of a previous block and a current block of the current block. Merkle root, timestamp, the block records the medical data information, and the timestamp is the time when the new data block was established;

Calculating, by the node, the obtained medical data information through a hash function of the Merkle root to generate a unique Merkle root record into the Merkle root of the current block of the block header;

The node encrypts the medical data information by an asymmetric encryption algorithm, and records the medical data information into the block body;

The node uses a chain structure to link the current block to the previous block and records the Merkle root of the previous block, resulting in the formation of a new block chain.
The computer device according to claim 13, wherein the node links the new data block to a previous data block to form a new block chain, and further causes the processor to perform the following steps: The node of the data block broadcasts a verification message to other nodes in the P2P network, the other nodes in the P2P network perform data verification on the new data block, and notify the consensus mechanism of the verification result, When all the verification results received by the consensus mechanism are valid, it is considered that all nodes in the P2P network recognize that the new data block is linked in the blockchain, and all verifications received by the consensus mechanism When the result is invalid, the new data block is considered invalid, the new data block is removed from the blockchain, and the medical data information corresponding to the new data block is sent to the next acquisition rotation Nodes with accounting rights perform accounting.
A storage medium storing computer-readable instructions. When the computer-readable instructions are executed by one or more processors, the one or more processors execute the following steps:

The blockchain system establishes a P2P network at the network layer, and sets any computer in the medical institution that applies to record medical data information as a node in the P2P network;

The blockchain system encapsulates a consensus mechanism in a consensus layer, and a preset number of nodes are filtered through the consensus mechanism, and the selected nodes obtain a right to rotate bookkeeping rights according to a preset schedule, and the bookkeeping is The process of recording medical data;

After the node obtains the right to take turns in accounting, it receives the medical data information sent by the consensus mechanism, establishes a new data block, records the medical data information into the new data block, and passes the area The chain structure of the block chain system links the new data block to the previous data block to form a new block chain.
The storage medium according to claim 17, wherein the consensus mechanism adopts a DPoS consensus mechanism, and the DPoS consensus mechanism is set to select a preset number of nodes;

When screening a preset number of nodes through the DPoS consensus mechanism, one or more processors are further caused to perform the following steps:

The nodes in the P2P network are registered on the blockchain system and accept the votes of other nodes. After receiving the votes of all nodes, the consensus mechanism records the number of votes of the nodes and presets the highest number of votes. The number of nodes will get the right to take turns in accounting;

The selected nodes obtain the right of bookkeeping in turn according to the preset schedule, and the consensus mechanism sends the medical data information to the selected nodes in turn according to the preset schedule.
The storage medium according to claim 17, wherein after the node obtains the right to take turns in accounting, it further causes one or more processors to perform the following steps:

After the node obtains the medical data information, the new data block is created. The new data block includes a block header and a block body, and the block header records a Merkle root of a previous block and a current block of the current block. Merkle root, timestamp, the block records the medical data information, and the timestamp is the time when the new data block was established;

Calculating, by the node, the obtained medical data information through a hash function of the Merkle root to generate a unique Merkle root record into the Merkle root of the current block of the block header;

The node encrypts the medical data information by an asymmetric encryption algorithm, and records the medical data information into the block body;

The node uses a chain structure to link the current block to the previous block and records the Merkle root of the previous block, resulting in the formation of a new block chain.
The storage medium of claim 17, wherein the node links the new data block to a previous data block to form a new block chain, and further causes one or more processors to perform the following steps: The node generating the data block broadcasts a verification message to other nodes in the P2P network, and the other nodes in the P2P network perform data verification on the new data block, and notify the consensus of the verification result Mechanism, when all verification results received by the consensus mechanism are valid, it is considered that all nodes in the P2P network recognize that the new data block is linked in the blockchain, and the consensus mechanism receives When all verification results are invalid, the new data block is considered invalid, the new data block is removed from the blockchain, and the medical data information corresponding to the new data block is sent to the next The nodes that have obtained the right to take turns to perform accounting.