CN112258092A - A blockchain-based data asset reliability assessment method and device - Google Patents

A blockchain-based data asset reliability assessment method and device Download PDF

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CN112258092A
CN112258092A CN202011322070.0A CN202011322070A CN112258092A CN 112258092 A CN112258092 A CN 112258092A CN 202011322070 A CN202011322070 A CN 202011322070A CN 112258092 A CN112258092 A CN 112258092A
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王智敏
孙艺新
秦蕊
郑厚清
贾德香
崔维平
刘威
柳占杰
于灏
陈�光
陈睿欣
王玓
刘素蔚
王程
李心达
高洪达
刘睿
袁勇
王飞跃
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State Grid Jiangxi Electric Power Co ltd
Institute of Automation of Chinese Academy of Science
State Grid Energy Research Institute Co Ltd
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Institute of Automation of Chinese Academy of Science
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Abstract

本发明提出了一种基于区块链的数据资产可信度评估方法、装置、电子设备及存储介质，涉及区块链应用技术领域，通过接收数据资产验证请求，验证所述数据资产真实性；获取验证节点的投票，收集投票结果并将投票结果反馈到区块链上；根据区块链上的投票结果确定该数据资产的评估结果，以保障电网数据的真实性，进一步地，评估各个验证节点的权重和信用度，加大可信节点和权威节点选票的权重，进一步提升数据真实性。

Figure 202011322070

The present invention provides a method, device, electronic device and storage medium for evaluating the credibility of data assets based on blockchain, and relates to the technical field of blockchain applications. The authenticity of the data assets is verified by receiving a data asset verification request; Obtain the votes of the verification nodes, collect the voting results and feed them back to the blockchain; determine the evaluation results of the data assets according to the voting results on the blockchain to ensure the authenticity of the grid data, and further evaluate each verification The weight and credibility of the nodes increase the weight of the votes of trusted nodes and authoritative nodes, and further improve the authenticity of the data.

Figure 202011322070

Description

Block chain-based data asset reliability assessment method and device
Technical Field
The invention relates to the technical field of block chain application, in particular to a block chain-based data asset credibility assessment method and device, electronic equipment and a storage medium.
Background
The power grid big data is considered as a basis for supporting safe, stable and reliable operation of the smart power grid, and reasonable development and application of the power grid big data can promote development, optimization and reformation of the power grid and improve operation benefits of the power grid. The reasonable application of the big data of the power grid requires efficient data quality management, so that data collection, retrieval and change are facilitated, the reliability and authenticity of the data are improved, and the sharing and transaction of the data are promoted.
The root cause of the problems of poor authenticity, poor safety and the like of the traditional power grid big data digital asset management method in data recording quality is that information cannot be smoothly transmitted due to a hierarchical management architecture, and the information is easy to distort in the transmission process. The block chain is a distributed shared super account book which is commonly maintained by nodes of the whole network and used for storing historical transaction records or data information, and has the advantages of decentralization, openness, autonomy, anonymity, information non-falsification and the like.
For distributed grid blockchain devices, the nodes in each network are unknown and unpredictable, and the behavior of the nodes is completely uncontrolled, and the nodes are not only subject to external malicious attacks, but also subject to misoperation or even malicious operation of the internal nodes themselves. Therefore, in addition to the security attributes in the blockchain infrastructure, how to further guarantee the authenticity of the grid data becomes another difficult problem.
Disclosure of Invention
The invention aims to provide a block chain-based data asset reliability assessment method to guarantee the authenticity of power grid data.
In a first aspect, an embodiment of the present invention provides a block chain-based data asset credibility assessment method, which verifies authenticity of a data asset based on a block chain and an electronic voting technique, and the assessment method includes:
receiving a data asset authenticity verification request, and voting by a verification node according to the verification request;
obtaining a voting result of the verification node and feeding the voting result back to the block chain;
and determining the evaluation result of the data asset according to the voting result on the block chain.
Optionally, receiving a data asset validation request, validating the data asset authenticity comprising:
receiving a data asset verification request Tx (Hash, Address, facility, N, M) of a main node, and activating the verification request, wherein the main node is a node needing to verify the data asset;
the verification node is used as a verifier to vote according to the verification request;
the Hash value of the data on the blockchain is represented, the Address represents an Address corresponding to the data outside the blockchain, the validity is used for returning the authenticity of the data, the N represents that the data authenticity verification request is recorded on the block with the number of N, and the M represents that the authenticity verification request waits for M blocks.
Optionally, the authenticity of the data is judged according to the voting result after the (N + M + 1) th block.
Optionally, obtaining the voting collection voting result of the verification node, and feeding the voting result back to the blockchain, includes:
and starting a pre-constructed verification protocol to broadcast a voting request to each verification node, taking the verification nodes except the main node on the block chain as data verifiers to vote, and returning voting results in the M blocks.
Optionally, the evaluation method further comprises:
and evaluating the weight and the credit degree of each verification node, and increasing the weight of votes from the trusted nodes and the authoritative nodes.
Optionally, the evaluating the weight and the credit rating of each verification node, and the increasing the weight of the votes from the trusted node and the authoritative node includes:
evaluating the weight w and the credit v of each node, and giving a score s ═ f (w, v) of each verifier node as a weight w' of a return value based on the weight w and the credit v, so that the weighted score of each verifier node is:
g＝w'c。
k represents the number of all verifier nodes and h represents the weighted total score of all verifier nodes, then
Figure BDA0002793193930000021
And setting a data authenticity threshold as alpha epsilon (0, 1), if h is larger than or equal to alpha, considering the data as real data, and if h is smaller than alpha, considering the data as not real data.
In a second aspect, an embodiment of the present invention provides a block chain-based data asset reliability assessment apparatus, where the assessment apparatus includes:
the verification module is used for receiving a data asset authenticity verification request, and the verification node votes according to the verification request;
the feedback module is used for acquiring the voting result of the verification node and feeding the voting result back to the block chain;
and the first evaluation module is used for determining the evaluation result of the data asset according to the voting result on the block chain.
Optionally, the evaluation device further comprises:
and the second evaluation module is used for evaluating the weight and the credit degree of each verification node and increasing the weight of votes from the credible nodes and the authoritative nodes.
In a third aspect, an embodiment of the present invention provides an electronic device, including:
a processor; a memory for storing processor-executable instructions;
wherein the processor implements the above method by executing the executable instructions.
In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium having stored thereon computer instructions, which when executed by a processor, implement the steps of the above-described method.
Advantageous effects
The invention provides a block chain-based data asset credibility assessment method, which comprises the steps of receiving a data asset verification request, and verifying the authenticity of a data asset; obtaining the voting of the verification node, collecting the voting result and feeding the voting result back to the block chain; and determining an evaluation result of the data asset according to the voting result on the block chain so as to guarantee the authenticity of the power grid data, further evaluating the weight and the credit degree of each verification node, increasing the weight of votes of the credible nodes and the authoritative nodes, and further improving the authenticity of the data.
Drawings
FIG. 1 is a flow chart of a block chain-based data asset trustworthiness assessment method according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for obtaining votes from verification nodes, collecting voting results, and feeding the voting results back to a blockchain according to an embodiment of the present invention;
FIG. 3 is a block chain based data asset authenticity certification implementation of an embodiment of the present invention;
FIG. 4 is a flow diagram of a block chain-based data asset trustworthiness assessment method in accordance with another embodiment of the present invention;
FIG. 5 is a block diagram of an embodiment of a block chain-based data asset credibility assessment apparatus;
fig. 6 is a block diagram of a block chain-based data asset credibility assessment apparatus according to another embodiment of the present invention;
fig. 7 is a block diagram of an electronic device according to an embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The root cause of the problems of poor authenticity, poor safety and the like of the traditional power grid big data digital asset management method in data recording quality is that information cannot be smoothly transmitted due to a hierarchical management architecture, and the information is easy to distort in the transmission process. The block chain is a distributed shared super account book which is commonly maintained by nodes of the whole network and used for storing historical transaction records or data information, and has the advantages of decentralization, openness, autonomy, anonymity, information non-falsification and the like.
The block chain technology realizes functions of decentralization, forgery prevention, falsification prevention and the like by adopting technologies such as a distributed consensus mechanism, an asymmetric encryption algorithm, block chain storage and the like, can ensure anonymity and openness of a voting process, is in accordance with authenticity and safety requirements of power grid data asset management, and provides a feasible technical path for digital asset credibility evaluation of power grid big data. Therefore, aiming at the industrial pain point and the technical difficulty of the power grid device in the aspect of data authenticity, the method is researched how to improve the data authenticity based on the block chain technology, construct a corresponding technical model and realize the data authenticity identification based on the block chain;
data authentication is a core technology for realizing data authenticity detection, and is also one of the important problems in the fields of cryptography and information security research. Aiming at the problem that authenticity identification of power grid data on a block chain is difficult to realize, a data asset authenticity assessment method based on the block chain is designed by adopting an electronic voting technology based on a coalition chain, and authenticity verification of data under the chain is realized by voting on the chain.
The invention will be further described with reference to the following description and specific examples, taken in conjunction with the accompanying drawings:
the invention aims to provide a block chain-based data asset reliability assessment method to guarantee the authenticity of power grid data.
FIG. 1 illustrates a flow diagram of a block chain based data asset trustworthiness assessment method of an embodiment of the present invention; as shown in fig. 1, the evaluation method verifies the authenticity of the data assets based on a block chain and an electronic voting technique, and the evaluation method comprises the following steps:
s20, receiving a data asset authenticity verification request, and voting by a verification node according to the verification request;
s40, obtaining the voting result of the verification node and feeding the voting result back to the block chain;
and S60, determining the evaluation result of the data asset according to the voting result on the block chain.
The embodiment verifies the authenticity of the data asset by receiving a data asset verification request; obtaining the voting of the verification node, collecting the voting result and feeding the voting result back to the block chain; and determining the evaluation result of the data asset according to the voting result on the block chain so as to ensure the authenticity of the power grid data.
Fig. 2 is a flowchart illustrating a method for obtaining voting results of verification nodes and feeding the voting results back to a blockchain according to an embodiment of the present invention, and fig. 3 is a process for implementing authenticity verification of data assets based on the blockchain according to an embodiment of the present invention; as shown in fig. 2-3, receiving a data asset validation request, validating the data asset authenticity includes:
receiving a data asset verification request Tx (Hash, Address, facility, N, M) of a main node, and activating the verification request, wherein the main node is a node needing to verify the data asset;
the verification node is used as a verifier to vote according to the verification request;
the Hash value of the data on the blockchain is represented, the Address represents the Address corresponding to the data outside the blockchain, the validity is used for returning the authenticity of the data, if the data is real, True is returned, and if the data is not real, False is returned. As shown in fig. 3, N indicates that the data authenticity verification request is recorded on the block numbered N, M indicates that the authenticity verification request waits for M blocks, and finally, after the (N + M + 1) th block, the authenticity of the data is determined according to the voting result.
Specifically, obtaining and feeding back the voting result of the verification node to the blockchain includes:
starting a pre-constructed verification protocol to broadcast a voting request to each verification node, taking the verification nodes except the main node on the block chain as verifiers to vote, and returning voting results in M blocks;
when the master node initiates the authenticity authentication request, a verification protocol is started to broadcast the request to each verification node. The verification node on the block chain is used as a data verifier Validator to vote, a voting result can be returned in the M blocks, and finally the authenticity of the data is judged according to the voting result after the (N + M + 1) th block.
Specifically, the authentication protocol includes three phases:
a) Pre-Prepare: a sequence number distribution stage, namely assigning a sequence number n to the verification request, broadcasting a sequence number distribution message and a request message m of the client, and transmitting a constructed PRE-PREPARE message to each verifier Validator;
b) prepare: in the interaction stage, a PRE-PREPARE message is received, and the PREPARE message is broadcast to other verifier nodes validators;
c) commit: and a sequence number confirmation stage, wherein after each verification node verifies the request and the sequence, the COMMIT message is broadcast.
A vote response (denoted by r) of the Validator of the different verifier nodes is received. If the verifier node Validator considers the data to be authentic, True is returned, otherwise False is returned.
Figure BDA0002793193930000061
Fig. 4 is a flowchart of a block chain-based data asset credibility assessment method according to another embodiment of the present invention, as shown in fig. 4, the assessment method further includes:
and S80, evaluating the weight and the credit degree of each verification node, and increasing the weight of votes from the credible nodes and the authoritative nodes.
Specifically, the evaluation of the weight and the credit degree of each verification node, and the increasing of the weight of votes from the trusted node and the authoritative node comprises the following steps:
defining the following indicative function to represent the scoring of the data truth vote by the Validator according to the return value of the verifier node Validator:
evaluating the weight w and the credit v of each node, and giving a score s ═ f (w, v) of each verifier node as a weight w' of a return value based on the weight w and the credit v, so that the weighted score of each verifier node is:
g＝w'c。
k represents the number of all verifier nodes and h represents the weighted total score of all verifier nodes, then
Figure BDA0002793193930000071
And setting a data authenticity threshold as alpha epsilon (0, 1), if h is larger than or equal to alpha, considering the data as real data, and if h is smaller than alpha, considering the data as not real data.
The invention provides a block chain-based data asset credibility assessment method, which comprises the steps of receiving a data asset verification request, and verifying the authenticity of a data asset; obtaining the voting of the verification node, collecting the voting result and feeding the voting result back to the block chain; and determining an evaluation result of the data asset according to the voting result on the block chain so as to guarantee the authenticity of the power grid data, further evaluating the weight and the credit degree of each verification node, increasing the weight of votes of the credible nodes and the authoritative nodes, and further improving the authenticity of the data.
FIG. 5 is a block diagram of an embodiment of a block chain-based data asset credibility assessment apparatus; as shown in fig. 5, the evaluation device includes:
the verification module 20 is configured to receive a data asset authenticity verification request, and the verification node votes according to the verification request;
a feedback module 40, configured to obtain a voting result of the verification node and feed the voting result back to the block chain;
a first evaluation module 60 for determining an evaluation result of the data asset based on the voting results on the blockchain.
Fig. 6 is a block diagram of a block chain-based data asset credibility assessment apparatus according to another embodiment of the present invention, as shown in fig. 6, the assessment apparatus further includes:
and the second evaluation module 80 is used for evaluating the weight and the credit degree of each verification node and increasing the weight of votes from the trusted node and the authoritative node.
Specifically, the evaluation of the weight and the credit degree of each verification node, and the increasing of the weight of votes from the trusted node and the authoritative node comprises the following steps:
defining the following indicative function to represent the scoring of the data truth vote by the Validator according to the return value of the verifier node Validator:
evaluating the weight w and the credit v of each node, and giving a score s ═ f (w, v) of each verifier node as a weight w' of a return value based on the weight w and the credit v, so that the weighted score of each verifier node is:
g＝w'c。
k represents the number of all verifier nodes and h represents the weighted total score of all verifier nodes, then
Figure BDA0002793193930000081
And setting a data authenticity threshold as alpha epsilon (0, 1), if h is larger than or equal to alpha, considering the data as real data, and if h is smaller than alpha, considering the data as not real data.
The embodiment of the invention provides a block chain-based data asset reliability assessment device, wherein a verification module 20 verifies the authenticity of a data asset by receiving a data asset verification request; the feedback module 40 acquires the votes of the verification nodes, collects the voting results and feeds the voting results back to the block chain; the first evaluation module 60 determines the evaluation result of the data asset according to the voting result on the block chain to ensure the authenticity of the power grid data, and further, the second evaluation module 80 evaluates the weight and the credit degree of each verification node, increases the weight of votes of the trusted nodes and the authoritative nodes, and further improves the authenticity of the data.
Fig. 7 is a block diagram showing the configuration of an electronic apparatus according to an embodiment of the present invention, and as shown in fig. 7, the computer electronic apparatus includes a Central Processing Unit (CPU)701 that can perform various appropriate actions and processes in accordance with a program stored in a Read Only Memory (ROM)702 or a program loaded from a storage section 708 into a Random Access Memory (RAM) 703. In the RAM 703, various programs and data necessary for the operation of the system 700 are also stored. The CPU 701, the ROM 702, and the RAM 703 are connected to each other via a bus 704. An input/output (I/O) interface 705 is also connected to bus 704.
The following components are connected to the I/O interface 705: an input section 1006 including a keyboard, a mouse, and the like; an output section 707 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage section 708 including a hard disk and the like; and a communication section 709 including a network interface card such as a LAN card, a modem, or the like. The communication section 709 performs communication processing via a network such as the internet. The drive 310 is also connected to the I/O interface 705 as needed. A removable medium 711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 710 as necessary, so that a computer program read out therefrom is mounted into the storage section 708 as necessary.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The application also provides a computer readable storage medium, which may be a computer readable storage medium included in the block chain-based data asset credibility assessment device in the above embodiments; or it may be a computer-readable storage medium that exists separately and is not built into the electronic device. The computer readable storage medium stores one or more programs for use by one or more processors in performing the blockchain-based data asset trustworthiness assessment methods described herein.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1.一种基于区块链的数据资产可信度评估方法，其特征在于，基于区块链和电子投票技术对数据资产真实性进行验证，所述评估方法包括：1. A method for evaluating the credibility of data assets based on block chain, characterized in that, based on block chain and electronic voting technology, the authenticity of data assets is verified, and the evaluation method comprises: 接收数据资产真实性验证请求，验证节点根据验证请求进行投票；Receive the authenticity verification request of the data asset, and the verification node votes according to the verification request; 获取验证节点的投票结果并反馈到区块链上；Obtain the voting results of the verification nodes and feed them back to the blockchain; 根据区块链上的投票结果确定该数据资产的评估结果。The evaluation result of the data asset is determined according to the voting result on the blockchain. 2.根据权利要求1所述的评估方法，其特征在于，接收数据资产真实性验证请求，验证节点根据验证请求进行投票包括：2. The evaluation method according to claim 1, characterized in that, receiving a data asset authenticity verification request, and the verification node voting according to the verification request comprises: 接收主节点的数据资产验证请求Tx＝(Hash,Address,Facticity,N,M)，并激活该验证请求，其中主节点为需要对数据资产真实性进行验证的节点；Receive the data asset verification request Tx=(Hash, Address, Facticity, N, M) of the master node, and activate the verification request, where the master node is the node that needs to verify the authenticity of the data asset; 验证节点作为验证器根据验证请求进行投票；Validation nodes act as validators to vote according to validation requests; 其中，Hash表示该数据在区块链上的哈希值，Address表示该数据在区块链外对应的地址，Facticity用于返回数据的真实性，N表示该数据真实性验证请求被记录在编号为N的区块上，M表示该真实性验证请求会等待M个区块。Among them, Hash indicates the hash value of the data on the blockchain, Address indicates the address corresponding to the data outside the blockchain, Facticity is used to return the authenticity of the data, and N indicates that the data authenticity verification request is recorded in the serial number On a block of N, M indicates that the authenticity verification request will wait for M blocks. 3.根据权利要求2所述的评估方法，其特征在于，在第N+M+1个区块之后根据投票结果来判断该数据的真实性。3. The evaluation method according to claim 2, wherein the authenticity of the data is judged according to the voting result after the N+M+1th block. 4.根据权利要求2所述的评估方法，其特征在于，获取验证节点的投票，收集投票结果并将投票结果反馈到区块链上，包括：4. The evaluation method according to claim 2, wherein obtaining the votes of the verification nodes, collecting the voting results and feeding the voting results back to the blockchain, comprising: 启动预先构建的验证协议以向各验证节点广播投票请求，区块链上除主节点外的的验证节点作为数据验证者进行投票,在M个区块中返回投票结果。Start the pre-built verification protocol to broadcast voting requests to each verification node, and the verification nodes on the blockchain except the master node vote as data verifiers, and return the voting results in M blocks. 5.根据权利要求1-4任一项所述的评估方法，其特征在于，所述评估方法还包括：5. The evaluation method according to any one of claims 1-4, wherein the evaluation method further comprises: 评估各个验证节点的权重和信用度，加大可信节点和权威节点选票的权重。Evaluate the weight and credit of each verification node, and increase the weight of votes of trusted nodes and authoritative nodes. 6.根据权利要求5所述的评估方法，其特征在于，评估各个验证节点的权重和信用度，加大可信节点和权威节点选票的权重包括：6. The evaluation method according to claim 5, characterized in that, evaluating the weight and credit of each verification node, and increasing the weight of votes of trusted nodes and authoritative nodes comprises: 评估各个节点的权重w和信用度v，并基于权重w和信用度v给各个验证节点的打分s＝f(w,v)作为返回值的权重w'，则每个验证者节点的加权评分为：Evaluate the weight w and credit degree v of each node, and give each verification node a score s=f(w, v) based on the weight w and credit degree v as the weight w' of the return value, then the weighted score of each verifier node is: g＝w'c。g=w'c. 用K表示所有验证者节点的数量，h表示所有验证者节点的加权总评分，则Let K represent the number of all validator nodes, and h represent the weighted total score of all validator nodes, then
Figure FDA0002793193920000021
Figure FDA0002793193920000021
 设定数据真实性阈值为α∈(0，1)，若h≥α，则认为该数据为真实数据,若h＜α，则认为该数据不是真实数据。The data authenticity threshold is set as α∈(0,1). If h≥α, the data is considered to be real data, and if h<α, the data is considered not to be real data. 7.一种基于区块链的数据资产可信度评估装置，其特征在于，所述评估装置包括：7. A block chain-based data asset credibility assessment device, characterized in that the assessment device comprises: 验证模块，用于接收数据资产真实性验证请求，验证节点根据验证请求进行投票；The verification module is used to receive the authenticity verification request of the data asset, and the verification node votes according to the verification request; 反馈模块，用于获取验证节点的投票，收集投票结果并将投票结果反馈到区块链上；The feedback module is used to obtain the votes of the verification nodes, collect the voting results and feed them back to the blockchain; 第一评估模块，用于根据区块链上的投票结果确定该数据资产的评估结果。The first evaluation module is used to determine the evaluation result of the data asset according to the voting result on the blockchain. 8.根据权利要求7所述的数据资产可信度评估装置，其特征在于，所述评估装置还包括：8. The data asset reliability evaluation device according to claim 7, wherein the evaluation device further comprises: 第二评估模块，评估各个验证节点的权重和信用度，加大可信节点和权威节点选票的权重。The second evaluation module evaluates the weight and credit of each verification node, and increases the weight of votes of trusted nodes and authoritative nodes. 9.一种电子设备，包括：9. An electronic device comprising: 处理器；用于存储处理器可执行指令的存储器；processor; memory for storing processor-executable instructions; 其中，所述处理器通过运行所述可执行指令以实现如权利要求1-6中任一项所述的方法。Wherein, the processor implements the method of any one of claims 1-6 by executing the executable instructions. 10.一种计算机可读存储介质，其上存储有计算机指令，该指令被处理器执行时实现如权利要求1-6中任一项所述方法的步骤。10. A computer-readable storage medium having stored thereon computer instructions that, when executed by a processor, implement the steps of the method of any of claims 1-6.
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