CN113300850B - Electronic transaction system based on block chain - Google Patents
Electronic transaction system based on block chain Download PDFInfo
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- CN113300850B CN113300850B CN202110484014.5A CN202110484014A CN113300850B CN 113300850 B CN113300850 B CN 113300850B CN 202110484014 A CN202110484014 A CN 202110484014A CN 113300850 B CN113300850 B CN 113300850B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/389—Keeping log of transactions for guaranteeing non-repudiation of a transaction
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/12—Applying verification of the received information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/56—Financial cryptography, e.g. electronic payment or e-cash
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees
Abstract
The invention discloses an electronic transaction system based on a block chain, which belongs to the technical field of electronic transaction and comprises a user layer, a transaction background and a transaction rule generation module for contract generation, wherein the output end of the user layer is electrically connected with the input end of a service sending module, the output end of the service sending module is electrically connected with the input end of a service receiving end, the output end of the service receiving end is electrically connected with the input end of a service classification module for classifying services, and the output end of the service classification module is connected with the input end of a block chain server through a network; the invention is internally provided with the transaction validity detection module which can monitor the validity of the final transaction and transmit the monitoring result to the supervision terminal, thereby ensuring the validity of the transaction, avoiding some illegal transactions, and timely discovering and attacking the illegal transactions, ensuring the safety of the transaction system and improving the overall application effect of the system.
Description
Technical Field
The invention belongs to the technical field of electronic transaction, and particularly relates to an electronic transaction system based on a block chain.
Background
Blockchains are a concept emerging in recent years, which is a term used in the field of information technology. The block chain is a database for storing data and information, and compared with a general database, the block chain has the characteristics of unforgeability, whole-course trace retention, traceability, public transparency, collective maintenance and the like. Due to the characteristics, the application safety of the block chain is effectively guaranteed, the block chain can be used in different fields, and the block chain technology has wide application prospect, wherein the block chain technology can be applied to electronic transactions.
The Chinese patent discloses (CN 202011066000.3) an electronic ticket transaction system and method based on a block chain, which comprises a plurality of central servers arranged in each zone, wherein each central server comprises a receiving module, a first judging module, a processing module, a database, a second judging module and an output module, the receiving module is used for acquiring transaction information of an electronic ticket and demarcating a seller central server and a buyer central server according to the transaction information, the first judging module is used for judging whether the electronic ticket transaction occurs in the same zone, and if so, the transaction is completed; otherwise, the transaction information is respectively forwarded to the seller center server and the buyer center server, and the seller center server and the buyer center server can be determined according to the acquired transaction information through the receiving module in the transaction process of the electronic ticket; then the first judging module judges whether the electronic ticket trade is in the same area, if yes, the settlement can be directly carried out in the own central server and the trade can be completed; on the contrary, if the electronic ticket transaction is judged to be a cross-regional transaction, the transaction information is synchronously forwarded to the central servers of the buyer and the seller, the transaction initiator of the two central servers checks the transaction information, and the security of the cross-regional transaction of the electronic ticket can be improved to a certain extent.
Disclosure of Invention
The invention aims to: the electronic transaction system based on the block chain is provided for solving the problems that a transaction validity detection module is not arranged in a traditional transaction system, validity monitoring cannot be carried out on the whole transaction process, the validity of the transaction cannot be guaranteed, and some illegal transactions cannot be avoided.
In order to achieve the purpose, the invention adopts the following technical scheme: an electronic transaction system based on a block chain comprises a user layer, a transaction background and a transaction rule generation module for contract generation, wherein the output end of the user layer is electrically connected with the input end of a service sending module, the output end of the service sending module is electrically connected with the input end of a service receiving end, the output end of the service receiving end is electrically connected with the input end of a service classification module for classifying services, the output end of the service classification module is connected with the input end of a block chain server through a network, the output ends of the block chain server, the transaction background and the transaction rule generation module are respectively electrically connected with the input end of a transaction module for electronic transaction, the output end of the transaction module is electrically connected with the input end of a block chain account book, the output end of the block chain account book is electrically connected with the input end of a transaction legality monitoring module, and the output end of the transaction legality monitoring module are connected with the input end of a supervision terminal through a G network.
As a further description of the above technical solution:
the user layer is composed of a user registration module, a user login management module, a user information modification module, a user key management module and a user sales management module, and the output end of the user registration module is electrically connected with the input end of the user login management module.
As a further description of the above technical solution:
the output end of the user login management module is electrically connected with the input end of the user information modification module, the output end of the user information modification module is electrically connected with the input end of the user key management module, and the output end of the user key management module is electrically connected with the input end of the user sales management module.
As a further description of the above technical solution:
the service classification module comprises a core service classification unit, a non-core service classification unit and an invalid core service classification unit.
As a further description of the above technical solution:
the transaction module of electron transaction sweeps the sign indicating number and reads module and transaction information reading module including transaction APP, the input electric connection that the sign indicating number read module was swept to transaction APP's output and APP, APP sweeps the output that the sign indicating number read module and the input electric connection that transaction information read the module.
As a further description of the above technical solution:
the output end of the transaction information reading module is electrically connected with the input end of the transaction data processing module, and the output end of the transaction data processing module is electrically connected with the input end of the transaction result packaging module.
As a further description of the above technical solution:
the transaction rule generation module comprises an intelligent contract module, and the output end of the intelligent contract module is electrically connected with the input ends of the asset exchange table establishment unit, the asset exchange table updating unit, the cross-mechanism transaction rule unit and the cross-mechanism transaction flow unit respectively.
As a further description of the above technical solution:
the block chain server adopts a distributed architecture.
As a further description of the above technical solution:
the intelligent contract module uses a Docker light-capacity device as an execution environment of the intelligent contract.
The transaction method of the transaction rule generation module comprises the following steps: a user registers a virtual resource account on an appointed member node, the virtual resource account is maintained by a relational database of the appointed member node, and a transaction request comprising a payer ID of a payer, an appointed transaction amount and a payee ID of a payee is received; the payer is a user who pays the specified transaction amount, and the payee is a user who takes in the specified transaction amount; performing transaction feasibility verification according to the transaction request, and executing account balance modification operation after the verification is passed; the account balance modification operation is to deduct the designated transaction amount from the resource account corresponding to the payer ID and add the designated transaction amount to the resource account corresponding to the payee ID; and generating a transaction record document for recording the account balance modification operation, and broadcasting the transaction record document to the blockchain network so that each member node issues the transaction record document to a blockchain based on a consensus mechanism.
Broadcasting the transaction record document to the blockchain network, specifically including: generating brief report information corresponding to the transaction record document by adopting a Hash algorithm according to the transaction record document; broadcasting the transaction record document and the briefing information to the blockchain network so that each member node issues the transaction record document and the briefing information to a blockchain based on a consensus mechanism; and sending the brief report information to the payer and/or the payee so that the payer and/or the payee can inquire the transaction record document from a blockchain by using the brief report information.
The transaction feasibility verification method comprises the following steps: the block chain node decrypts the initial balance of each transaction party through a key code sent by the transaction party, calculates the initial balance of the transaction party corresponding to the payer ID and the payee ID based on the transaction type and the appointed transaction amount to obtain a new balance, and broadcasts the encrypted new balance corresponding to each transaction party to each node of the block chain through an agreed contract; after the node of the block chain receives the broadcasted new encrypted balance corresponding to each transaction party, starting a corresponding contract for verification; if the verification is passed, the contract corresponding to each node on the block chain updates the data of the contract based on the encrypted new balance corresponding to each transaction party; and calling an external preset positive balance verification system to start a plurality of threads, wherein each thread is simultaneously responsible for carrying out positive balance verification on the balance of a corresponding single account, and if the positive balance verification of the single account balance of each node on the block chain passes, judging that the transaction verification passes.
The key code generation rule comprises the following steps: the information encryption party carries out encryption calculation on a plaintext to be encrypted, then carries out signature, issues in a ciphertext mode, publicly requests all nodes in a block chain for verification, and carries out block chain verification on the signature and information receiver information by the nodes respectively through a block chain public key and carries out operation verification on the ciphertext through the same encryption calculation through the public key.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the system is internally provided with a transaction validity detection module which can monitor the validity of the final transaction and transmit the monitoring result to a monitoring terminal, the design can effectively ensure the validity of the transaction and avoid illegal transactions, and the illegal transactions can be found and attacked in time to ensure the safety of the transaction system.
Drawings
Fig. 1 is a schematic block diagram of an electronic transaction system based on a blockchain.
Fig. 2 is a schematic view of a sub-module structure of a user layer in an electronic transaction system based on a blockchain.
Fig. 3 is a schematic view of a sub-module structure of a traffic classification module in an electronic transaction system based on a blockchain.
Fig. 4 is a schematic view of a sub-module structure of a transaction module in an electronic transaction system based on a blockchain.
Fig. 5 is a schematic structural diagram of sub-modules of a transaction rule generation module in an electronic transaction system based on a block chain.
Illustration of the drawings:
1. a user layer; 2. a service classification module; 3. a transaction module; 4. and a transaction rule generation module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-5, the present invention provides a technical solution: an electronic transaction system based on a block chain comprises a user layer 1, a transaction background and a transaction rule generating module 4 for contract generation, wherein the output end of the user layer 1 is electrically connected with the input end of a business sending module, the output end of the business sending module is electrically connected with the input end of a business receiving end, the output end of the business receiving end is electrically connected with the input end of a business classifying module 2 for classifying businesses, the output end of the business classifying module 2 is connected with the input end of a block chain server through a network, the output ends of the block chain server, the transaction background and the transaction rule generating module 4 are respectively electrically connected with the input end of a transaction module 3 for electronic transaction, the output end of the transaction module 3 is electrically connected with the input end of a block chain account book, and the output end of the block chain account book is electrically connected with the input end of a transaction validity monitoring module, the output end of the transaction validity monitoring module is connected with the input end of the monitoring terminal through a 5G network, the transaction validity detecting module can monitor the validity of the final transaction and transmit the monitoring result to the monitoring terminal, the design can effectively ensure the validity of the transaction, avoid illegal transactions and discover and attack the illegal transactions in time to ensure the safety of a transaction system, the user layer 1 consists of a user registration module, a user login management module, a user information modification module, a user key management module and a user sales management module, the output end of the user registration module is electrically connected with the input end of the user login management module, and the output end of the user login management module is electrically connected with the input end of the user information modification module, the output end of the user information modification module is electrically connected with the input end of the user key management module, the output end of the user key management module is electrically connected with the input end of the user sales management module, and the user layer 1 is arranged and consists of a user registration module, a user login management module, a user information modification module, a user key management module and the user sales management module, so that various kinds of information of a user can be effectively summarized and managed in the user layer 1, the condition that a transaction process is wrong due to disorder of user information is avoided, and the major loss is avoided;
the service classification module 2 comprises a core service classification unit, a non-core service classification unit and an invalid core service classification unit, and by arranging the service classification module 2, the service classification module 2 can effectively classify services into three types, namely core services, non-core services and invalid core services, and quickly classify service types, so that the system can process service information with pertinence and validity, and the working efficiency of the whole system is improved;
the transaction module 3 of the electronic transaction comprises a transaction APP, an APP code scanning reading module and a transaction information reading module, the output end of the transaction APP is electrically connected with the input end of the APP code scanning reading module, the output end of the APP code scanning reading module is electrically connected with the input end of the transaction information reading module, the output end of the transaction information reading module is electrically connected with the input end of a transaction data processing module, the output end of the transaction data processing module is electrically connected with the input end of a transaction result packaging module, the transaction module 3 of the electronic transaction is arranged, the transaction module comprises the transaction APP, the APP code scanning reading module and the transaction information reading module, a user can carry out transaction in the transaction module 3, the APP code scanning module is designed in the system, the user can carry out electronic transaction more quickly and conveniently, meanwhile, the entry of transaction information can be completed through code scanning, the traditional substantial specific transaction operation step method is abandoned, the privacy in the transaction process can be guaranteed, the transaction information leakage is avoided, and the privacy of important data in an organization is effectively guaranteed;
the transaction rule generation module 4 comprises an intelligent contract module, the output end of the intelligent contract module is electrically connected with the input ends of the asset rate table establishment unit, the asset rate table updating unit, the cross-institution transaction rule unit and the cross-institution transaction flow unit, the intelligent contract module uses a Docker light volume device as the execution environment of the intelligent contract, and the transaction rule generation module 4 comprises an intelligent contract module which can automatically generate some contracts related to transactions, so that both parties of the transactions can clearly determine the information related to the transactions, and the transaction dispute is avoided.
The transaction method of the transaction rule generation module comprises the following steps: a user registers a virtual resource account on an appointed member node, the virtual resource account is maintained by a relational database of the appointed member node, and a transaction request comprising a payer ID of a payer, an appointed transaction amount and a payee ID of a payee is received; the payer is a user who pays the specified transaction amount, and the payee is a user who takes in the specified transaction amount; performing transaction feasibility verification according to the transaction request, and executing account balance modification operation after the verification is passed; the account balance modification operation is to deduct the specified transaction amount from the resource account corresponding to the payer ID and add the specified transaction amount to the resource account corresponding to the payee ID; and generating a transaction record document for recording the account balance modification operation, and broadcasting the transaction record document to the blockchain network so that each member node issues the transaction record document to the blockchain based on a consensus mechanism.
Broadcasting the transaction record document to the blockchain network, specifically including: generating brief report information corresponding to the transaction record document by adopting a Hash algorithm according to the transaction record document; broadcasting the transaction record document and the briefing information to the blockchain network so that each member node issues the transaction record document and the briefing information to a blockchain based on a consensus mechanism; and sending the brief report information to the payer and/or the payee so that the payer and/or the payee can inquire the transaction record document from a blockchain by using the brief report information.
The transaction feasibility verification method comprises the following steps: the block chain node decrypts the initial balance of each transaction party through a key code sent by the transaction party, calculates the initial balance of the transaction party corresponding to the payer ID and the payee ID based on the transaction type and the appointed transaction amount to obtain a new balance, and broadcasts the encrypted new balance corresponding to each transaction party to each node of the block chain through an agreed contract; after the node of the block chain receives the broadcasted new encrypted balance corresponding to each transaction party, starting a corresponding contract for verification; if the verification is passed, the contract corresponding to each node on the block chain updates the data of the contract based on the encrypted new balance corresponding to each transaction party; and calling an external preset positive balance verification system to start a plurality of threads, wherein each thread is simultaneously responsible for carrying out positive balance verification on the balance of a corresponding single account, and if the positive balance verification of the single account balance of each node on the block chain passes, judging that the transaction verification passes.
The key code generation rule comprises: the information encryption party carries out encryption calculation on a plaintext to be encrypted, then carries out signature, issues in a ciphertext mode, publicly requests all nodes in a block chain for verification, and carries out block chain verification on the signature and information receiver information by the nodes respectively through a block chain public key and carries out operation verification on the ciphertext through the same encryption calculation through the public key. The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. An electronic trading system based on a block chain comprises a user layer (1), a trading background and a trading rule generation module (4) for contract generation, and is characterized in that: the output end of the user layer (1) is electrically connected with the input end of a business sending module, the output end of the business sending module is electrically connected with the input end of a business receiving end, the output end of the business receiving end is electrically connected with the input end of a business classification module (2) for classifying businesses, the output end of the business classification module (2) is connected with the input end of a block chain server through a network, the output ends of the block chain server, a transaction background and a transaction rule generation module (4) are respectively electrically connected with the input end of a transaction module (3) for electronic transaction, the output end of the transaction module (3) is electrically connected with the input end of a block chain account book, the output end of the block chain account book is electrically connected with the input end of a transaction legality monitoring module, and the output end of the transaction legality monitoring module is connected with the input end of a supervision terminal through a 5G network; the trading method of the trading rule generation module (4) comprises the following steps: a user registers a virtual resource account on an appointed member node, the virtual resource account is maintained by a relational database of the appointed member node, and a transaction request comprising a payer ID of a payer, an appointed transaction amount and a payee ID of a payee is received; the payer is a user who pays the specified transaction amount, and the payee is a user who receives the specified transaction amount; performing transaction feasibility verification according to the transaction request, and executing account balance modification operation after the verification is passed; the account balance modification operation is to deduct the specified transaction amount from the resource account corresponding to the payer ID and add the specified transaction amount to the resource account corresponding to the payee ID; generating a transaction record document for recording the account balance modification operation, and broadcasting the transaction record document to the blockchain network so that each member node issues the transaction record document to a blockchain based on a consensus mechanism; broadcasting the transaction record document to the blockchain network, specifically including: generating brief report information corresponding to the transaction record document by adopting a Hash algorithm according to the transaction record document; broadcasting the transaction record document and the briefing information to the blockchain network so that each member node issues the transaction record document and the briefing information to a blockchain based on a consensus mechanism; sending the briefing information to the payer and/or the payee so that the payer and/or the payee can inquire the transaction record document from a blockchain by using the briefing information; the transaction feasibility verification method comprises the following steps: the block chain node decrypts the initial balance of each transaction party through a key code sent by the transaction party, calculates the initial balance of the transaction party corresponding to the payer ID and the payee ID based on the transaction type and the appointed transaction amount to obtain a new balance, and broadcasts the encrypted new balance corresponding to each transaction party to each node of the block chain through an agreed contract; after the node of the block chain receives the broadcasted new encrypted balance corresponding to each transaction party, starting a corresponding contract for verification; if the verification is passed, the contract corresponding to each node on the block chain updates the data of the contract based on the encrypted new balance corresponding to each transaction party; calling an external preset positive balance verification system to start a plurality of threads, wherein each thread is simultaneously responsible for performing positive balance verification on the balance of a corresponding single account, and if the positive balance verification of the balance of the single account of each node on the block chain passes, judging that the transaction verification passes; the key code generation rule comprises: the information encryption party carries out encryption calculation on a plaintext to be encrypted, then carries out signature, issues in a ciphertext mode, publicly requests all nodes in a block chain for verification, and carries out block chain verification on the signature and information receiver information by the nodes respectively through a block chain public key and carries out operation verification on the ciphertext through the same encryption calculation through the public key; the user layer (1) consists of a user registration module, a user login management module, a user information modification module, a user key management module and a user sales management module, wherein the output end of the user registration module is electrically connected with the input end of the user login management module, and the block chain server adopts a distributed architecture; the output end of the user login management module is electrically connected with the input end of the user information modification module, the output end of the user information modification module is electrically connected with the input end of the user key management module, and the output end of the user key management module is electrically connected with the input end of the user sales management module.
2. The blockchain-based electronic transaction system according to claim 1, wherein the traffic classification module (2) comprises a core traffic classification unit, a non-core traffic classification unit and an invalid core traffic classification unit; the transaction module (3) of the electronic transaction comprises a transaction APP, an APP code scanning reading module and a transaction information reading module, wherein the output end of the transaction APP is electrically connected with the input end of the APP code scanning reading module, and the output end of the APP code scanning reading module is electrically connected with the input end of the transaction information reading module; the output end of the transaction information reading module is electrically connected with the input end of the transaction data processing module, and the output end of the transaction data processing module is electrically connected with the input end of the transaction result packaging module.
3. The blockchain-based electronic trading system of claim 2, wherein the trading rule generating module (4) comprises an intelligent contract module, and an output end of the intelligent contract module is electrically connected with input ends of the asset rate table establishing unit, the asset rate table updating unit, the cross-institution trading rule unit and the cross-institution trading flow unit, respectively; the intelligent contract module uses a Docker light-capacity device as an execution environment of the intelligent contract.
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| CN106548330A (en) * | 2016-10-27 | 2017-03-29 | 上海亿账通区块链科技有限公司 | Transaction verification method and system based on block chain |
| CN108711105A (en) * | 2018-05-16 | 2018-10-26 | 四川吉鼎科技有限公司 | A kind of Secure Transaction verification method and system based on block chain |
| CN108876380A (en) * | 2018-08-07 | 2018-11-23 | 阿里巴巴集团控股有限公司 | A kind of method of commerce and system for depositing card based on centralization clearing and block chain |
| CN109242453A (en) * | 2018-08-07 | 2019-01-18 | 阿里巴巴集团控股有限公司 | A kind of method of commerce and system for depositing card based on centralization clearing and block chain |
| CN109377216A (en) * | 2018-08-07 | 2019-02-22 | 阿里巴巴集团控股有限公司 | A kind of method of commerce and system for depositing card based on centralization clearing and block chain |
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