CN110659903A - Data transaction method based on block chain - Google Patents
Data transaction method based on block chain Download PDFInfo
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- CN110659903A CN110659903A CN201910833356.6A CN201910833356A CN110659903A CN 110659903 A CN110659903 A CN 110659903A CN 201910833356 A CN201910833356 A CN 201910833356A CN 110659903 A CN110659903 A CN 110659903A
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- G06Q20/38—Payment protocols; Details thereof
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Abstract
The invention provides a data transaction method based on a block chain, which belongs to the technical field of data transaction and comprises the following steps: building a big data transaction block chain; at least one trust node applies for joining a big data transaction block chain; signing an intelligent contract; the first node sends first broadcast information to a big data transaction block chain; each second node and each third node respectively judge whether the second node and each third node store data corresponding to the data transaction request: the first node receives second broadcast information sent by the second node, wherein the second broadcast information comprises identification information; the third node judges whether the number of the received real-time timestamps sent by the first node in a time period of a preset time length exceeds a preset threshold value or not; the first node sends third broadcast information to the big data transaction block chain; the second/third node executes the data trading contract in accordance with the smart contract. The invention has the beneficial effects that: the efficiency and the safety of data transaction based on the block chain are improved.
Description
Technical Field
The invention relates to the technical field of data transaction, in particular to a data transaction method based on a block chain.
Background
Big data plays an increasingly important role in the color of the foot. Data sharing and trading has become a hotspot in current technologies and businesses. Due to the fact that data have large differences compared with traditional commodities, the data are prone to loss, copying and secrecy and the like. Thus, there are higher demands on the processing power of the transaction, traceability of the transaction process, integrity of the transaction data and reliability. For enterprises with limited data collection capabilities, data trading will be a reciprocal job that can promote innovation in companies.
However, the existing data transaction method has the problems that the transaction modes of the common data and the sensitive data cannot be distinguished, the transaction efficiency of the common data is higher compared with that of the sensitive data, if the common data and the sensitive data are transacted in the same mode, the existing data transaction mode has lower efficiency, and whether the identity of a data requester who requests the sensitive data from a data provider for many times is always trustable cannot be ensured.
Disclosure of Invention
Aiming at the problems in the prior art, the invention relates to a data transaction method based on a block chain.
The invention adopts the following technical scheme:
a data transaction method based on a blockchain comprises the following steps:
step S1, building a big data transaction block chain by a plurality of trust nodes and at least one big data center;
step S2, applying for adding the big data transaction block chain by at least one trust node, wherein the trust node is composed of a first node, a second node and a third node, and sensitive data are pre-stored in the third node;
step S3, each trust node in the big data transaction block chain respectively signs an intelligent contract with all other trust nodes in the big data transaction block chain;
step S4, the first node sends first broadcast information to the big data transaction blockchain, where the first broadcast information includes a data transaction request and a corresponding real-time timestamp;
step S5, each of the second nodes and each of the third nodes respectively determine whether the data transaction request itself stores data corresponding to the data transaction request:
if the second node is judged to store the data corresponding to the data transaction request, turning to step S6;
if the third node is judged to store the data corresponding to the data transaction request, turning to step S7;
step S6, the first node receives second broadcast information sent by the second node, where the second broadcast information includes identification information, and the identification information is used to identify that the data requested by the first node is stored, and then go to step S8;
step S7, the third node determines whether the number of the real-time timestamps sent by the first node that have been received in a time period of a preset duration exceeds a preset threshold:
if the judgment result is yes, the third node broadcasts the identification information of the first node to the big data transaction block chain and carries out pause and subsequent processing operation according to a preset disposal strategy;
if the determination result is negative, the first node receives the second broadcast information sent by the third node, where the second broadcast information includes the identification information, and the identification information is used to identify and store the data requested by the first node, and then go to step S8;
step S8, the first node sends third broadcast information to the big data transaction blockchain, where the third broadcast information is used to indicate that the first node receives data provided by the second node/the third node;
in step S9, after the first node receives the fourth broadcast message sent by the second node/the third node, the second node/the third node executes a data transaction contract according to the intelligent contract.
Preferably, the trust nodes applied to the periphery of the big data center are established by using a big data block chain technology, and at least one trust node is configured in one big data center.
Preferably, the intelligent contract comprises a data transaction requesting party, a data transaction executing party, data request content and a contract policy.
Preferably, the first node sends the first broadcast message to the big data transaction block chain according to the data request message, and the first broadcast message includes a hash value of the data request message determined by the first node according to the data request message.
Preferably, the fourth broadcast message includes: authorized scope of use of the transaction data.
Preferably, the fourth broadcast message includes encryption information and signature information;
the encrypted information is the information obtained by encrypting the data by the second node by adopting the public key of the first node;
the signature information is the information obtained by the second node signing the encrypted information by adopting the private key of the second node.
Preferably, in step S7, the subsequent processing operation specifically includes:
step a1, the second node sends request information of digital certificate to the first node;
step a2, the first node sends a corresponding digital certificate to the second node;
step a3, the first node decrypts the data certificate by using the public key of the certificate center corresponding to the digital certificate to obtain the public key in the digital certificate, and determines whether the public key in the digital certificate is consistent with the public key of the first node pre-stored in the second node:
if yes, go to step S8;
if the judgment result is negative, the operation is suspended.
Preferably, in step S9, the second node performs two hash operations on the transaction data to obtain first digest information, and encrypts the first digest information multiple times by using two private keys to obtain digital signature information of the transaction data, and the first node decrypts the digital signature information by using two public keys to obtain the transaction data.
Preferably, in step S9, the third node performs hash operation on the transaction data twice or more to obtain second digest information, and encrypts the first digest information multiple times by using at least two private keys to obtain digital signature information of the transaction data, and the first node decrypts the digital signature information by using at least two public keys to obtain the transaction data.
The invention has the beneficial effects that: the second node for storing the common data and the third node for storing the sensitive data adopt different data transaction modes to improve the efficiency of data transaction based on the block chain, and the third node performs identity verification on the first node when the first node requests the sensitive data for multiple times so as to improve the safety of the data transaction based on the block chain.
Drawings
FIG. 1 is a flow chart of a block chain based data transaction method in accordance with a preferred embodiment of the present invention;
FIG. 2 is a flow chart of the subsequent processing operations in a preferred embodiment of the present invention.
Detailed Description
In the following embodiments, the technical features may be combined with each other without conflict.
The following further describes embodiments of the present invention with reference to the drawings:
as shown in fig. 1, a data transaction method based on a blockchain includes:
step S1, building a big data transaction block chain by a plurality of trust nodes and at least one big data center;
step S2, applying for adding the big data transaction block chain by at least one trust node, wherein the trust node is composed of a first node, a second node and a third node, and the third node is prestored with sensitive data;
step S3, each of the trust nodes in the big data transaction block chain signs an intelligent contract with all other trust nodes in the big data transaction block chain;
step S4, the first node sends first broadcast information to the big data transaction block chain, where the first broadcast information includes a data transaction request and a corresponding real-time timestamp;
step S5, each of the second nodes and each of the third nodes respectively determine whether the data transaction request itself stores data corresponding to the data transaction request:
if the second node is determined to store the data corresponding to the data transaction request, go to step S6;
if the third node is determined to store the data corresponding to the data transaction request, go to step S7;
step S6, the first node receives second broadcast information sent by the second node, where the second broadcast information includes identification information, and the identification information is used to identify and store data requested by the first node, and then go to step S8;
step S7, the third node determines whether the number of the real-time timestamps sent by the first node that have been received in a time period of a preset duration exceeds a preset threshold:
if the judgment result is yes, the third node broadcasts the identification information of the first node to the big data transaction block chain and carries out pause and subsequent processing operation according to a preset disposal strategy;
if the determination result is negative, the first node receives the second broadcast information sent by the third node, where the second broadcast information includes the identification information used for identifying and storing the data requested by the first node, and then goes to step S8;
step S8, the first node sends a third broadcast message to the big data transaction blockchain, where the third broadcast message is used to indicate that the first node receives data provided by the second node/the third node;
in step S9, after the first node receives the fourth broadcast message sent by the second node/the third node, the second node/the third node executes a data transaction contract according to the intelligent contract.
In this embodiment, the second node storing the normal data and the third node storing the sensitive data use different data transaction modes to improve the efficiency of data transaction based on the blockchain, and the third node performs identity verification on the first node when the first node requests the sensitive data for multiple times to improve the security of data transaction based on the blockchain.
In a preferred embodiment, big data blockchain techniques are used to establish trust nodes for use in the periphery of big data centers, one of said big data centers having at least one of said trust nodes.
In a preferred embodiment, the intelligent contract comprises a data transaction requester, a data transaction executor, data request content and a contract policy.
In a preferred embodiment, the first node sends the first broadcast message to the big data transaction block chain according to the data request message, and the first broadcast message includes a hash value of the data request message determined by the first node according to the data request message.
In a preferred embodiment, the fourth broadcast message includes: authorized scope of use of the transaction data.
In a preferred embodiment, the fourth broadcast message includes encryption information and signature information;
the encrypted information is the information obtained by encrypting the data by the second node by adopting the public key of the first node;
the signature information is the information obtained by the second node signing the encrypted information by adopting the private key of the second node.
As shown in fig. 2, in a preferred embodiment, in the step S7, the subsequent processing operation specifically includes:
step a1, the second node sends request information of digital certificate to the first node;
step a2, the first node sends corresponding digital certificate to the second node;
step a3, the first node decrypts the data certificate by using the public key of the certificate center corresponding to the digital certificate to obtain the public key in the digital certificate, and determines whether the public key in the digital certificate is consistent with the public key of the first node pre-stored in the second node:
if yes, go to step S8;
if the judgment result is negative, the operation is suspended.
In a preferred embodiment, in the step S9, the second node performs two hash operations on the transaction data to obtain first digest information, and encrypts the first digest information multiple times by using two private keys to obtain digital signature information of the transaction data, and the first node decrypts the digital signature information by using two public keys to obtain the transaction data.
In a preferred embodiment, in the step S9, the third node performs two or more hash operations on the transaction data to obtain second digest information, and encrypts the first digest information multiple times by using at least two private keys to obtain digital signature information of the transaction data, and the first node decrypts the digital signature information by using at least two public keys to obtain the transaction data.
While the specification concludes with claims defining exemplary embodiments of particular structures for practicing the invention, it is believed that other modifications will be made in the spirit of the invention. While the above invention sets forth presently preferred embodiments, these are not intended as limitations.
Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. Therefore, the appended claims should be construed to cover all such variations and modifications as fall within the true spirit and scope of the invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to be within the intent and scope of the present invention.
Claims (9)
1. A data transaction method based on block chain is characterized in that,
step S1, building a big data transaction block chain by a plurality of trust nodes and at least one big data center;
step S2, applying for adding the big data transaction block chain by at least one trust node, wherein the trust node is composed of a first node, a second node and a third node, and sensitive data are pre-stored in the third node;
step S3, each trust node in the big data transaction block chain respectively signs an intelligent contract with all other trust nodes in the big data transaction block chain;
step S4, the first node sends first broadcast information to the big data transaction blockchain, where the first broadcast information includes a data transaction request and a corresponding real-time timestamp;
step S5, each of the second nodes and each of the third nodes respectively determine whether the data transaction request itself stores data corresponding to the data transaction request:
if the second node is judged to store the data corresponding to the data transaction request, turning to step S6;
if the third node is judged to store the data corresponding to the data transaction request, turning to step S7;
step S6, the first node receives second broadcast information sent by the second node, where the second broadcast information includes identification information, and the identification information is used to identify that the data requested by the first node is stored, and then go to step S8;
step S7, the third node determines whether the number of the real-time timestamps sent by the first node that have been received in a time period of a preset duration exceeds a preset threshold:
if the judgment result is yes, the third node broadcasts the identification information of the first node to the big data transaction block chain and carries out pause and subsequent processing operation according to a preset disposal strategy;
if the determination result is negative, the first node receives the second broadcast information sent by the third node, where the second broadcast information includes the identification information, and the identification information is used to identify and store the data requested by the first node, and then go to step S8;
step S8, the first node sends third broadcast information to the big data transaction blockchain, where the third broadcast information is used to indicate that the first node receives data provided by the second node/the third node;
in step S9, after the first node receives the fourth broadcast message sent by the second node/the third node, the second node/the third node executes a data transaction contract according to the intelligent contract.
2. A data transaction method according to claim 1, wherein large data blockchain techniques are used to establish trust nodes for use in the periphery of large data centers, one of said large data centers being provided with at least one of said trust nodes.
3. The data transaction method of claim 1, wherein the intelligent contract comprises a data transaction requester, a data transaction executor, data request content, and a contract policy.
4. The data transaction method of claim 1, wherein the first node sends the first broadcast message into the big data transaction blockchain according to the data request message, the first broadcast message including a hash value of the data request message determined by the first node according to the data request message.
5. The data transaction method of claim 1, wherein the fourth broadcast message comprises: authorized scope of use of the transaction data.
6. The data transaction method of claim 1, wherein the fourth broadcast message includes encryption information and signature information;
the encrypted information is the information obtained by encrypting the data by the second node by adopting the public key of the first node;
the signature information is the information obtained by the second node signing the encrypted information by adopting the private key of the second node.
7. The data transaction method according to claim 1, wherein in the step S7, the subsequent processing operation specifically includes:
step a1, the second node sends request information of digital certificate to the first node;
step a2, the first node sends a corresponding digital certificate to the second node;
step a3, the first node decrypts the data certificate by using the public key of the certificate center corresponding to the digital certificate to obtain the public key in the digital certificate, and determines whether the public key in the digital certificate is consistent with the public key of the first node pre-stored in the second node:
if yes, go to step S8;
if the judgment result is negative, the operation is suspended.
8. The data transaction method according to claim 1, wherein in step S9, the second node performs two hash operations on the transaction data to obtain first digest information, and encrypts the first digest information multiple times by using two private keys to obtain digital signature information of the transaction data, and the first node decrypts the digital signature information by using two public keys to obtain the transaction data.
9. The data transaction method according to claim 1, wherein in step S9, the third node performs a hash operation on the transaction data twice or more to obtain second digest information, and encrypts the first digest information multiple times by using at least two private keys to obtain digital signature information of the transaction data, and the first node decrypts the digital signature information by using at least two public keys to obtain the transaction data.
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| CN112052250A (en) * | 2020-09-02 | 2020-12-08 | 杭州复杂美科技有限公司 | Performance measurement method, broadcast performance adjustment method, device and storage medium |
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