WO2018076762A1

WO2018076762A1 - Block chain-based transaction verification method and system, electronic device, and medium

Info

Publication number: WO2018076762A1
Application number: PCT/CN2017/091252
Authority: WO
Inventors: 陆陈一帆; 黄宇翔; 姚晓星
Original assignee: 上海亿账通区块链科技有限公司
Priority date: 2016-10-27
Filing date: 2017-06-30
Publication date: 2018-05-03
Also published as: CN106548330A; CN106548330B

Abstract

A block chain-based transaction verification method and system, an electronic device, and a medium. The method comprises: when a node on a block chain processes a transaction, decrypt an original balance of each transaction party, calculate the original balance of each transaction party to obtain a new balance, encrypt the new balance of each transaction party to obtain encrypted new balances, and broadcast each encrypted new balance to each node of the block chain by means of an intelligent contract (S10); when the node of the block chain receives the broadcasted encrypted new balance corresponding to each transaction party, start corresponding intelligent contract to perform composite number verification (S20); if the composite number verification succeeds, the intelligent contract corresponding to each node on the block chain updates own data according to the encrypted new balance corresponding to each transaction party (S30); invoke a preset external negative balance verification system of the block chain to start a plurality of threads, each thread being responsible for performing negative balance verification on the balance of a single account of each node on the block chain (S40). According to the method, whether transaction is normal or not can be verified, and the transaction processing speed on the block chain can also be guaranteed in the case that a system overhead is not occupied.

Description

Block chain based transaction verification method, system, electronic device and medium

Priority claim

This application is based on the Paris Convention on the priority of the Chinese patent application entitled "Blockchain-Based Transaction Verification Method and System", filed on October 27, 2016, with the application number CN201610959872.X, the overall content of the Chinese patent application. It is incorporated herein by reference.

Technical field

The present invention relates to the field of blockchain technology, and in particular, to a blockchain-based transaction verification method, system, electronic device and medium.

Background technique

Due to its decentralization and unchangeable information, blockchain technology is increasingly favored by companies in the fields of finance and insurance, especially the use of blockchain technology to achieve multi-party trading events (for example, transfer Events such as transactions, payment transactions, etc. are increasingly becoming the focus of attention. For example, when Bank A wants to buy 100 tickets to Bank B, if the transaction is on the blockchain, then all other nodes in the blockchain will The advantage of seeing this transaction is that other participants can participate in confirming the accuracy of the transaction and preventing the tampering of the information. However, since there is no absolute authority node in the decentralized blockchain system, collective verification of each transaction is a necessary step, which makes the transaction of the transaction participant without secret, and the account of an institution also has It may be tracked by an organization on another node, posing a risk of information disclosure.

Although the industry has adopted some blockchain transaction solutions to solve information leakage, the existing solutions are either inadequately solved by information leakage, or computationally inefficient, and the system runs overhead, limiting blockchain technology. Use in trading scenarios.

In summary, how to effectively use the blockchain technology in trading scenarios has become an urgent solution in the case of not only ensuring the security of transaction information, but also ensuring the speed of transaction processing and reducing system overhead. Technical problem.

Summary of the invention

The main object of the present invention is to provide a blockchain-based transaction verification method, system, electronic device and medium, which are intended to effectively ensure the security of transaction information and ensure the speed of transaction processing.

The first aspect of the present application provides a blockchain-based transaction verification method, the method comprising the following steps:

A1. When a node on the blockchain processes a transaction with a transaction type and a transaction amount, the node decrypts the original balance of each of the parties through the first decryption parameter sent by the transaction party of the transaction, and is based on The transaction type and the transaction amount are calculated for the original balance of each of the transaction parties to obtain a corresponding new balance, and the new balance corresponding to each of the counterparties is encrypted by the encryption parameter sent by the transaction party to obtain an encrypted new balance. And broadcasting, by the smart contract, the encrypted new balance corresponding to each of the transaction parties to each node of the blockchain;

A2. After the node of the blockchain receives the encrypted new balance corresponding to each of the parties to the broadcast, the corresponding smart contract is started to perform the combined verification;

A3. If the smart contract corresponding to each node on the blockchain verifies the combined number of the encrypted new balance corresponding to each of the counterparties, the smart contract corresponding to each node on the blockchain is based on each of the counterparties. The encrypted new balance updates its own data;

A4, calling the negative balance verification system preset by the blockchain to start multiple threads, each thread is also responsible for performing negative balance check on the balance of each account of each node in the blockchain, if each block of the block is If the negative balance of the single account balance of the node is passed, it is determined that the transaction is verified.

A second aspect of the present application provides a blockchain-based transaction verification system, the transaction verification system comprising:

a broadcast module, configured to: when a node on the blockchain processes a transaction with a transaction type and a transaction amount, the first decryption parameter sent by the node through the transaction party of the transaction decrypts each of the transaction parties The original balance, and calculating the original balance of each of the transaction parties based on the transaction type and the transaction amount to obtain a corresponding new balance, and performing the new balance corresponding to each of the transaction parties through the encryption parameter sent by the transaction party Encrypting to obtain a new encrypted balance, and broadcasting the encrypted new balance corresponding to each of the correspondent parties to each node of the blockchain through a smart contract;

a combination verification module, configured to: when the node of the blockchain receives the encrypted new balance corresponding to each of the broadcast parties, the corresponding smart contract is started to perform the combined verification;

And an update module, configured to: if the smart contract corresponding to each node on the blockchain validates the combined number of the encrypted new balance corresponding to each of the correspondent parties, the smart contract corresponding to each node on the blockchain is based on each The encrypted new balance corresponding to the transaction party updates its own data;

a balance checking module, configured to call a negative balance verification system preset by the blockchain to start a plurality of threads, and each thread is also responsible for performing a negative balance check on the balance of a single account of each node on the blockchain, if the area is If the negative balance of the individual account balance of each node on the blockchain is passed, it is determined that the transaction is verified.

A third aspect of the present application provides an electronic device, including a processing device, a storage device, and a transaction verification system, the transaction verification system being stored in the storage device, including at least one computer readable instruction, the at least one computer readable instruction The processing device executes to:

A3. If the smart contract corresponding to each node on the blockchain verifies the combined number of the encrypted new balance corresponding to each of the correspondent parties, the smart contract corresponding to each node on the blockchain is based on each The encrypted new balance corresponding to the transaction party updates its own data;

A fourth aspect of the present application provides a computer readable storage medium having stored thereon at least one computer readable instruction executable by a processing device to:

The blockchain-based transaction verification method, system, electronic device and medium proposed by the invention, when a node on a blockchain processes a transaction with a transaction type and a transaction amount, based on the transaction type and transaction amount The original balance of the transaction party is calculated to obtain a corresponding new balance, and the new balance corresponding to each of the counterparties is encrypted by the encryption parameter sent by the transaction party to obtain a new encrypted balance, and broadcasted to each of the blockchains. On the node; when the node of the blockchain receives the encrypted new balance corresponding to each of the parties to the broadcast, the corresponding smart contract is started to perform the combined verification; when the composite verification is passed, the blockchain is passed. The smart contract corresponding to the node updates its own data based on the transaction parameters. Since the new balance corresponding to each of the parties to the broadcast is encrypted, the other nodes of the blockchain cannot know the new balance, and the data update is performed only after the verification of the number is passed, thereby preventing multi-party transactions. The balance of each account is leaked, which effectively ensures the security of the transaction information. In addition, the balance of the individual accounts of the respective nodes is also sent to the negative balance verification system preset outside the blockchain to perform a negative balance check. By using the external negative balance verification system to perform the negative balance check, it is possible to further verify whether the multi-party transaction is normal, and to ensure the transaction processing speed on the blockchain without occupying the system overhead.

DRAWINGS

1 is a schematic diagram of an application environment of a preferred embodiment of a blockchain-based transaction verification method according to the present invention;

2 is a schematic flow chart of a method for verifying a transaction based on a blockchain according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of functional modules of an embodiment of a transaction verification system according to the present invention.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in order to make the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1 , it is a schematic diagram of an application environment of a preferred embodiment of a blockchain-based transaction verification method according to the present invention. The application environment diagram includes an electronic device 1 and a terminal device 2. The electronic device 1 can perform data interaction with the terminal device 2 through a suitable technology such as a network or a near field communication technology.

The terminal device 2 includes, but is not limited to, any electronic product that can interact with a user through a keyboard, a mouse, a remote controller, a touch pad, or a voice control device, for example, a personal computer, a tablet computer, a smart phone, or an individual. Digital Assistant (PDA), game console, Internet Protocol Television (IPTV), smart wearable device, etc.

The electronic device 1 is an apparatus capable of automatically performing numerical calculation and/or information processing in accordance with an instruction set or stored in advance. The electronic device 1 may be a computer, a single network server, a server group composed of multiple network servers, or a cloud-based cloud composed of a large number of hosts or network servers, where cloud computing is a type of distributed computing, A super virtual computer consisting of a loosely coupled set of computers.

In the present embodiment, the electronic device 1 includes, but is not limited to, a storage device 11, a processing device 12, and a network interface 13 that are communicably connected to each other through a system bus. It should be noted that FIG. 1 only shows the electronic device 1 having the components 11-13, but it should be understood that not all illustrated components are required to be implemented, and more or fewer components may be implemented instead.

The storage device 11 includes a memory and at least one type of readable storage medium. The memory provides a cache for the operation of the electronic device 1; the readable storage medium may be a non-volatile storage medium such as a flash memory, a hard disk, a multimedia card, a card type memory, or the like. In some embodiments, the readable storage medium may be an internal storage unit of the electronic device 1, such as a hard disk of the electronic device 1; in other embodiments, the non-volatile storage medium may also be external to the electronic device 1. A storage device, such as a plug-in hard disk equipped with an electronic device 1, a smart memory card (SMC), a Secure Digital (SD) card, a flash card, or the like. In this embodiment, the readable storage medium of the storage device 11 is generally used to store an operating system installed in the electronic device 1 and various types of application software, such as program codes of the transaction verification system in an embodiment of the present application. Further, the storage device 11 can also be used to temporarily store various types of data that have been output or are to be output.

Processing device 12 may, in some embodiments, include one or more microprocessors, microcontrollers, digital processors, and the like. The processing device 12 is generally used to control the operation of the electronic device 1, for example, to perform control and processing related to data interaction or communication with the terminal device 2. In the present embodiment, the processing device 12 is configured to run program code or process data stored in the storage device 11, such as running a transaction verification system or the like.

The network interface 13 may comprise a wireless network interface or a wired network interface, which is typically used to establish a communication connection between the electronic device 1 and other electronic devices. In this embodiment, the network interface 13 is mainly used to connect the electronic device 1 with one or more terminal devices 2, and establish a data transmission channel and a communication connection between the electronic device 1 and one or more terminal devices 2.

The transaction verification system includes at least one computer readable instruction stored in the storage device 11, the at least one computer readable instruction being executable by the processing device 12 to implement the blockchain based transaction verification method of various embodiments of the present application. As described later, the at least one computer readable instruction can be classified into different logic modules depending on the functions implemented by its various parts.

In an embodiment, when the transaction verification system is executed by the processing device 12, the following operations are performed: first, when a node on the blockchain processes a transaction with a transaction type and a transaction amount, the node passes the transaction party of the transaction. Transmitting the first decryption parameter to decrypt the original balance of each of the transaction parties, and calculating the original balance of each of the transaction parties based on the transaction type and the transaction amount to obtain a corresponding new balance, corresponding to each of the counterparties The new balance is encrypted by the encryption parameter sent by the transaction party to obtain a new encrypted balance, and the encrypted new balance corresponding to each of the transaction parties is broadcasted to each node of the blockchain through the smart contract; when the blockchain After receiving the encrypted new balance corresponding to each of the parties to the broadcast, the node starts the corresponding smart contract to perform the combined verification; if the smart contract corresponding to each node on the block chain encrypts the corresponding corresponding party If the composite of the new balance is verified, the smart contract corresponding to each node on the blockchain is based on each of the counterparties. Encrypt the new balance to update its own data; call the negative balance verification system preset by the blockchain to start multiple threads, and each thread is responsible for performing negative balance check on the balance of each account of each node on the blockchain. If the negative balance of the individual account balance of each node on the blockchain passes, it is determined that the transaction is verified, and the related information of the transaction and the transaction result are sent to the terminal device 2 for display to the terminal user.

In an embodiment, the transaction verification system is stored in the storage device 11 and includes at least one computer readable instruction stored in the storage device 11, the at least one computer readable instruction being executable by the processing device 12 to implement the present application. A blockchain based transaction verification method of an embodiment. As described later, the at least one computer readable instruction can be classified into different logic modules depending on the functions implemented by its various parts.

The invention provides a blockchain based transaction verification method.

Referring to FIG. 2, FIG. 2 is a schematic flowchart of a method for verifying a transaction based on a blockchain according to an embodiment of the present invention.

In an embodiment, the blockchain based transaction verification method comprises:

Step S10, a node on the blockchain is processing a transaction with a transaction type and a transaction amount. In an easy time, the node decrypts the original balance of each of the transaction parties by using the first decryption parameter sent by the transaction party of the transaction, and calculates the original balance of each of the transaction parties based on the transaction type and the transaction amount. The new balance, the new balance corresponding to each of the parties is encrypted by the encryption parameter sent by the transaction party to obtain a new encrypted balance, and the encrypted new balance corresponding to each of the parties is broadcasted to the block through the smart contract. On each node of the chain.

When a node on the blockchain completes a transaction event, it broadcasts the transaction parameters corresponding to the transaction event to other nodes on the blockchain. The transaction parameter may include a transaction type and/or a transaction amount. For example, if the A node on the blockchain transfers the amount X to the B node, the A node broadcasts the transaction parameter corresponding to the transaction event to the area. For other nodes on the blockchain, the transaction parameters of the external broadcast include "transaction type: A node roll-out", and the transaction parameters of the external broadcast of the node A also include "transaction amount: X"; meanwhile, the node B also deals the transaction event. The corresponding transaction parameters are broadcast to other nodes on the blockchain. The transaction parameters of the external broadcast include “transaction type: B node transfer”, and the transaction parameters broadcasted by the B node include “transaction amount: X”.

In this embodiment, when a node on the blockchain is processing a transaction with a transaction type (for example, A transfer to B) and a transaction amount, the first decryption parameter sent by the node through the transaction party of the transaction. Decrypting the original balance of each of the parties, and calculating the original balance of each of the parties based on the transaction type and the transaction amount to calculate a corresponding new balance, and passing the new balance corresponding to each of the parties Encryption parameters sent by the transaction party (the encryption parameters may be the same as the decryption parameters, or may be different) are encrypted, and the encrypted new balance corresponding to each transaction party is broadcasted to the blockchain through the smart contract. On each node.

Step S20: After the node of the blockchain receives the encrypted new balance corresponding to each of the broadcast parties, the corresponding smart contract is started to perform the combined verification.

The data on the blockchain is usually stored in two places on the participating nodes: the smart contract (each smart contract has its own current state) and the transaction log on the node (transaction log, used to roll out each In the current state of the data on the smart contract, each blockchain node corresponds to one transaction record and one or more smart contracts. When a transaction parameter is transmitted to the node of the blockchain, the transaction parameter is recorded on the transaction record corresponding to the node and simultaneously transmitted to the smart contract corresponding to the transaction parameter to run, and corresponding to the transaction parameter. The code on the smart contract updates the smart contract's own data.

In this embodiment, if the blockchain node receives the encrypted new balance corresponding to each of the transaction parties broadcasted by other nodes on the blockchain, the blockchain node sends the encrypted new balance to the The smart contract corresponding to the blockchain node performs the composite verification, that is, whether the sum of the balances of all the nodes before the transaction is equal to the sum of the balances of all the nodes after the transaction, to verify whether the transaction is normal. In this embodiment, the smart contract corresponding to the blockchain node may perform the composite verification based on the preset homomorphic encryption verification algorithm.

Among them, homomorphic encryption is a cryptographic technique based on the computational complexity theory of mathematical problems. The homomorphic encrypted data is processed to obtain an output, and the output is decrypted, and the result is the same as the output obtained by processing the unencrypted original data by the same method. In this embodiment, based on the preset homomorphic encryption verification algorithm, it can be verified whether the sum of the balances of all nodes before the transaction is equal to The sum of the balances of all nodes after the transaction to verify that the transaction is normal. For example, in an implementation manner, the smart contract corresponding to the blockchain node may be combined and verified by an additive homomorphic encryption verification algorithm, assuming that R and S are domains, and the encryption function E:R→S is an additive homomorphism. If there is a valid algorithm ⊕ such that E(x+y)=E(x)⊕E(y) or x+y=D(E(x)⊕E(y)) holds, the effective algorithm is additive The homomorphic encryption verification algorithm, which not only verifies the account number, but also ensures that the balance x and y of the account are not leaked.

When using blockchain technology for multi-participating trading events such as transfer transactions, payment transactions, etc., in the decentralized blockchain system, since there is no absolute authority node, collective verification must be performed for each transaction. . In this embodiment, the homomorphic encryption verification algorithm is used to perform the composite verification, which can effectively verify whether the transaction using the blockchain technology for multi-party participation is normal, and prevent the balance of the multi-party account from being leaked, thereby effectively ensuring the transaction information. Safety.

Step S30, if the smart contract corresponding to each node on the blockchain passes the combined verification of the encrypted new balance corresponding to each of the counterparties, the smart contract corresponding to each node on the blockchain is based on each of the parties. The corresponding encrypted new balance updates its own data;

If the smart contract corresponding to the blockchain node passes the verification of the transaction parameter, the transaction is normal, and the smart contract corresponding to each node on the blockchain is based on the encrypted new balance corresponding to each of the transaction parties. Update. For example, if the transaction parameter includes a transaction type of “A node rollout” and the transaction parameter includes a transaction amount of X, the smart contract corresponding to the blockchain node reduces the balance of the A node in the own data by X. .

S40. Calling the negative balance verification system preset by the blockchain to start multiple threads, and each thread is also responsible for performing a negative balance check on the balance of each account of each node on the blockchain, if each block of the block is If the negative balance of the single account balance of the node is passed, it is determined that the transaction is verified.

Because the balance of each node is a separate array, multi-thread check can be performed on multiple node balances. At the same time, because the account, transaction type and amount of the same node participating in each transaction are recorded, it is false. The balance check can effectively prevent the user from changing the balance of a certain sub-account in the form of a sub-account balance by a certain account, thereby avoiding the verification of the combined verification. For example, the bank A can pass 100 bills on the account 001 through the following The form of the sub-account balance is changed to 400: first create a 002 account and put 400 balance, and then save -300 on a new 003 account.

In this embodiment, the negative balance verification system outside the blockchain, that is, using a negative balance verification system that is not running on the blockchain, initiates multiple threads for each account of each node participating in the transaction event. The negative balance check of the balance can prevent the user from defrauding the case of the number verification by creating a negative account number, and can further verify the transaction more accurately. Moreover, the negative balance verification system is not in the area. Running on the blockchain, but running separately on the outside, will not affect the transaction processing speed on the blockchain, effectively ensuring faster transaction processing speed on the blockchain.

In this embodiment, if the blockchain node receives the transaction parameters broadcast by other nodes on the blockchain. Number, the node on the blockchain calculates the original balance of each of the counterparties based on the transaction type and the transaction amount when processing the transaction with the transaction type and the transaction amount, and obtains the corresponding new balance, and The new balance corresponding to the transaction party is encrypted by the encryption parameter sent by the transaction party to obtain a new encrypted balance, which is broadcasted to each node of the blockchain; when the node of the blockchain receives each of the broadcasted After the new balance is encrypted by the counterparty, the corresponding smart contract is started to perform the composite verification; after the composite verification is passed, the smart contract corresponding to the blockchain node updates the self data based on the transaction parameter. Since the new balance corresponding to each of the parties to the broadcast is encrypted, the other nodes of the blockchain cannot know the new balance, and the data update is performed only after the verification of the number is passed, thereby preventing multi-party transactions. The balance of each account is leaked, which effectively ensures the security of the transaction information. In addition, the balance of the individual accounts of the respective nodes is also sent to the negative balance verification system preset outside the blockchain to perform a negative balance check. By using the external negative balance verification system to perform the negative balance check, it is possible to further verify whether the multi-party transaction is normal, and to ensure the transaction processing speed on the blockchain without occupying the system overhead.

Further, in other embodiments, the method may further include:

Encrypting the second decryption parameter by a node corresponding to the node of the blockchain and the node of the block on the blockchain, and broadcasting the encrypted second decryption parameter to the blockchain through the smart contract On the square node, the second decryption parameter is used to decrypt the encrypted new balance corresponding to each of the transaction parties;

The supervisor node on the blockchain reads the updated encrypted new balance corresponding to each of the transaction parties, and decrypts the encrypted second decryption parameter through the secret key, and passes the decrypted second decryption parameter. Decrypting the encrypted new balance corresponding to each of the counterparties, and performing negative balance verification on each of the decrypted new balances.

In this embodiment, when the node broadcasts the encrypted new balance corresponding to each of the transaction parties to each node of the blockchain through the smart contract, it also uses the encrypted corresponding to each of the transaction parties. The second decryption parameter for decrypting the new balance is encrypted by the key corresponding to the node of the supervisor, and the encrypted decryption parameter is broadcasted to the supervisor node on the blockchain through the smart contract. The smart contract corresponding to each node on the blockchain verifies the combined number of the encrypted new balance corresponding to each of the correspondent parties, and the smart contract corresponding to each node on the blockchain is based on the encryption corresponding to each of the correspondent parties. After the new balance is updated, the supervised node on the blockchain reads the encrypted new balance corresponding to each of the updated parties, and decrypts the encrypted decryption parameter by using the secret key. Decrypting the encrypted new balance corresponding to each of the transaction parties by the decrypted decryption parameter, and performing negative balance verification on each of the decrypted new balances, further from the blockchain itself to the respective blocks on the blockchain The balance of the account is checked for negative balance to further verify that the transaction is normal.

Further, in other embodiments, the method may further include:

If the account fails the negative balance check, the supervisor node determines the abnormal block chain node corresponding to the account, and the abnormal condition of the account is directed to other sections except the abnormal blockchain node. Click to notify.

If an account fails to pass the negative balance check, it may be that the user has deceived the number verification by creating a negative account number, and the supervisor node on the blockchain determines the abnormality corresponding to the account. a blockchain node, and notifying the abnormality of the account to other nodes in the blockchain except the abnormal blockchain node, to remind other nodes that the account is in an abnormal state, and the account corresponds to an abnormality Trading events involving blockchain nodes may present risks.

Further, in other embodiments, the method may further include:

If the account does not pass the negative balance check, the supervisor node cancels the transaction right of the abnormal block chain node on the blockchain through the preset blockchain rights management system.

If the negative balance verification system performs a negative balance check on the balance of a single account, and the account fails to pass the negative balance check, it may be that the user has deceived the combined verification by creating a negative account number. If the transaction event involved in the abnormal blockchain node corresponding to the account may be at risk, the transaction rights of the abnormal blockchain node on the blockchain may be cancelled by a preset blockchain rights management system. In order to prevent the abnormal blockchain node from continuing to participate in the transaction on the blockchain, the transaction security of the nodes other than the abnormal blockchain node in the blockchain is ensured.

Further, in other embodiments, the method may further include:

If the smart contract corresponding to the blockchain node fails to pass the verification of the transaction parameter, send a notification that the transaction event combination verification fails to all participating nodes of the transaction event, or to the block All nodes on the chain send a notification that the transaction event failed to verify. In the event that all of the participating nodes of the transaction event or all nodes on the blockchain are alerted to the transaction event, the transaction event in which the blockchain node participates may be at risk.

The invention further provides a blockchain based transaction verification system.

Referring to FIG. 3, FIG. 3 is a schematic diagram of functional modules of an embodiment of a transaction verification system according to the present invention.

In an embodiment, the transaction verification system comprises:

a broadcast module 01, configured to: when a node on the blockchain processes a transaction with a transaction type and a transaction amount, the node decrypts each of the parties by using a first decryption parameter sent by the transaction party of the transaction The original balance, and calculating the original balance of each of the counterparties based on the transaction type and the transaction amount to obtain a corresponding new balance, and encrypting the new balance corresponding to each of the counterparties through the transaction party Encryption is performed to obtain a new encrypted balance, and the encrypted new balance corresponding to each of the counterparties is broadcasted to each node of the blockchain through the smart contract.

When a node on the blockchain completes a transaction event, it broadcasts the transaction parameters corresponding to the transaction event to other nodes on the blockchain. The transaction parameter may include a transaction type and/or a transaction amount. For example, if the A node on the blockchain transfers the amount X to the B node, the A node broadcasts the transaction parameter corresponding to the transaction event to the area. For other nodes on the blockchain, the transaction parameters of the external broadcast include "transaction type: A node rollout", and the transaction parameters of the A node external broadcast. The number also includes “transaction amount: X”; at the same time, the node B also broadcasts the transaction parameters corresponding to the transaction event to other nodes on the blockchain, and the transaction parameters of the external broadcast include “transaction type: B node transfer The transaction parameters of the B-node external broadcast also include "transaction amount: X".

The combination verification module 02 is configured to start a corresponding smart contract for the composite verification when the node of the blockchain receives the encrypted new balance corresponding to each of the broadcast parties.

Among them, homomorphic encryption is a cryptographic technique based on the computational complexity theory of mathematical problems. The homomorphic encrypted data is processed to obtain an output, and the output is decrypted, and the result is the same as the output obtained by processing the unencrypted original data by the same method. In this embodiment, based on the preset homomorphic encryption verification algorithm, it can be verified whether the sum of the balances of all the nodes before the transaction is equal to the sum of the balances of all the nodes after the transaction, thereby verifying whether the transaction is normal. For example, in an implementation manner, the smart contract corresponding to the blockchain node may be combined and verified by an additive homomorphic encryption verification algorithm, assuming that R and S are domains, and the encryption function E:R→S is an additive homomorphism. If there is a valid algorithm ⊕ such that E(x+y)=E(x)⊕E(y) or x+y=D(E(x)⊕E(y)) holds, the effective algorithm is additive The homomorphic encryption verification algorithm, which not only verifies the account number, but also ensures that the balance x and y of the account are not leaked.

When using blockchain technology for multi-participating trading events such as transfer transactions, payment transactions, etc., in the decentralized blockchain system, since there is no absolute authority node, collective verification must be performed for each transaction. . In this embodiment, the homomorphic encryption verification algorithm is used to perform the composite verification, which can effectively verify whether the transaction using the blockchain technology for multi-party participation is normal. It can also prevent the leakage of the balance of multiple accounts, and effectively ensure the security of transaction information.

The update module 03 is configured to: if the smart contract corresponding to each node on the blockchain verifies the combined number of the encrypted new balance corresponding to each of the correspondent parties, the smart contract corresponding to each node on the blockchain is based on each The encrypted new balance corresponding to the transaction party updates its own data.

The balance check module 04 is configured to invoke a preset negative balance verification system external to the blockchain to start multiple threads, and each thread is also responsible for performing a negative balance check on the balance of a single account of each node on the blockchain, if If the negative balance of the individual account balance of each node on the blockchain is passed, it is determined that the transaction is verified.

In this embodiment, if the blockchain node receives the transaction parameters broadcast by other nodes on the blockchain, the node on the blockchain processes the transaction with the transaction type and the transaction amount, based on the transaction type and Transaction amount is calculated for each original party's original balance to obtain a corresponding new balance, and the new balance corresponding to each of the counterparties is encrypted by the encryption parameter sent by the transaction party to obtain a new encrypted balance, and broadcasted to the On each node of the blockchain; when the node of the blockchain receives the encrypted new balance corresponding to each of the parties to the broadcast, the corresponding smart contract is started to perform the combined verification; The smart contract corresponding to the blockchain node updates its own data based on the transaction parameters. Since the new balance corresponding to each of the parties to the broadcast is encrypted, the other nodes of the blockchain cannot know the new balance, and the data update is performed only after the verification of the number is passed, thereby preventing multi-party transactions. The balance of each account is leaked, which effectively ensures the security of the transaction information. In addition, the balance of the individual accounts of each node is also sent to the office. A negative balance verification system preset outside the blockchain is used to perform a negative balance check. By using the external negative balance verification system to perform the negative balance check, it is possible to further verify whether the multi-party transaction is normal, and to ensure the transaction processing speed on the blockchain without occupying the system overhead.

Further, in other embodiments, the foregoing broadcast module 01 can also be used to:

The above balance check module 04 can also be used to:

And reading, by the supervisor node on the blockchain, the updated new balance corresponding to each of the transaction parties, and decrypting the encrypted second decryption parameter by using the secret key, and decrypting the second decryption The parameter decrypts the encrypted new balance corresponding to each of the counterparties, and performs negative balance verification on each of the decrypted new balances.

Further, in other embodiments, the above balance checking module 04 can also be used to:

If the account fails the negative balance check, the supervisor node determines the abnormal block chain node corresponding to the account, and notifies the abnormal status of the account to other nodes except the abnormal block chain node.

If the account fails the negative balance check, the supervisor node passes the preset blockchain. The rights management system cancels the transaction rights of the abnormal blockchain node on the blockchain.

Further, in other embodiments, the above-mentioned composite verification module 02 can also be used to:

Moreover, the present invention also provides a computer readable storage medium storing a transaction verification system, the transaction verification system being executable by at least one processing device to cause the at least one processing device to perform, for example The steps of the block chain-based transaction verification method in the above embodiment, the specific implementation processes of the steps S10, S20, and S30 of the block chain-based transaction verification method are as described above, and are not described herein again.

It is to be understood that the term "comprises", "comprising", or any other variants thereof, is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes those elements. It also includes other elements that are not explicitly listed, or elements that are inherent to such a process, method, article, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and can also be implemented by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

The preferred embodiments of the present invention have been described above with reference to the drawings, and are not intended to limit the scope of the invention. The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments. Additionally, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

A person skilled in the art can implement the invention in various variants without departing from the scope and spirit of the invention. For example, the features of one embodiment can be used in another embodiment to obtain a further embodiment. Any modifications, equivalent substitutions and improvements made within the technical concept of the invention are intended to be included within the scope of the invention.

Claims

A blockchain-based transaction verification method, characterized in that the method comprises the following steps:

A1. When a node on the blockchain processes a transaction with a transaction type and a transaction amount, the node decrypts the original balance of each of the parties through the first decryption parameter sent by the transaction party of the transaction, and is based on The transaction type and the transaction amount are calculated for the original balance of each of the transaction parties to obtain a corresponding new balance, and the new balance corresponding to each of the counterparties is encrypted by the encryption parameter sent by the transaction party to obtain an encrypted new balance. And broadcasting, by the smart contract, the encrypted new balance corresponding to each of the transaction parties to each node of the blockchain;

A2. After the node of the blockchain receives the encrypted new balance corresponding to each of the parties to the broadcast, the corresponding smart contract is started to perform the combined verification;

A3. If the smart contract corresponding to each node on the blockchain verifies the combined number of the encrypted new balance corresponding to each of the counterparties, the smart contract corresponding to each node on the blockchain is based on each of the counterparties. The encrypted new balance updates its own data;

A4, calling the negative balance verification system preset by the blockchain to start multiple threads, each thread is also responsible for performing negative balance check on the balance of each account of each node in the blockchain, if each block of the block is If the negative balance of the single account balance of the node is passed, it is determined that the transaction is verified.
The blockchain-based transaction verification method according to claim 1, wherein the method further comprises:

Encrypting the second decryption parameter by a node corresponding to the node of the blockchain and the node of the block on the blockchain, and broadcasting the encrypted second decryption parameter to the blockchain through the smart contract On the square node, the second decryption parameter is used to decrypt the encrypted new balance corresponding to each of the transaction parties;

The supervisor node on the blockchain reads the updated encrypted new balance corresponding to each of the transaction parties, and decrypts the encrypted second decryption parameter through the secret key, and passes the decrypted second decryption parameter. Decrypting the encrypted new balance corresponding to each of the counterparties, and performing negative balance verification on each of the decrypted new balances.
The blockchain-based transaction verification method according to claim 1 or 2, wherein the method further comprises:

If the account fails to pass the negative balance check, the supervisor node determines the abnormal block chain node corresponding to the account, and notifies the abnormal status of the account to other nodes except the abnormal blockchain node.
The blockchain-based transaction verification method according to claim 1 or 2, wherein the method further comprises:

If the account fails to pass the negative balance check, the supervisor node cancels the transaction right of the abnormal block chain node on the blockchain through a preset blockchain rights management system.
The blockchain-based transaction verification method according to claim 1 or 2, wherein the method further comprises:

If the smart contract corresponding to the blockchain node fails to pass the verification of the transaction parameter, the notification of the failure of the transaction event combination verification is sent to all participating nodes of the transaction event, or to the blockchain All nodes send a notification that the transaction event combination verification failed.
A blockchain based transaction verification system, characterized in that the transaction verification system comprises:

a broadcast module, configured to: when a node on the blockchain processes a transaction with a transaction type and a transaction amount, the first decryption parameter sent by the node through the transaction party of the transaction decrypts each of the transaction parties The original balance, and calculating the original balance of each of the transaction parties based on the transaction type and the transaction amount to obtain a corresponding new balance, and performing the new balance corresponding to each of the transaction parties through the encryption parameter sent by the transaction party Encrypting to obtain a new encrypted balance, and broadcasting the encrypted new balance corresponding to each of the correspondent parties to each node of the blockchain through a smart contract;

a combination verification module, configured to: when the node of the blockchain receives the encrypted new balance corresponding to each of the broadcast parties, the corresponding smart contract is started to perform the combined verification;

And an update module, configured to: if the smart contract corresponding to each node on the blockchain validates the combined number of the encrypted new balance corresponding to each of the correspondent parties, the smart contract corresponding to each node on the blockchain is based on each The encrypted new balance corresponding to the transaction party updates its own data;

a balance checking module, configured to call a negative balance verification system preset by the blockchain to start a plurality of threads, and each thread is also responsible for performing a negative balance check on the balance of a single account of each node on the blockchain, if the area is If the negative balance of the individual account balance of each node on the blockchain is passed, it is determined that the transaction is verified.
The transaction verification system according to claim 6, wherein the broadcast module is further configured to:

Encrypting the second decryption parameter by a node corresponding to the node of the blockchain and the node of the block on the blockchain, and broadcasting the encrypted second decryption parameter to the blockchain through the smart contract On the square node, the second decryption parameter is used to decrypt the encrypted new balance corresponding to each of the transaction parties;

The balance verification module is further configured to:

And reading, by the supervisor node on the blockchain, the updated new balance corresponding to each of the transaction parties, and decrypting the encrypted second decryption parameter by using the secret key, and decrypting the second decryption The parameter decrypts the encrypted new balance corresponding to each of the counterparties, and performs negative balance verification on each of the decrypted new balances.
The transaction verification system according to claim 6 or 7, wherein the balance verification module is further configured to:

If the account fails the negative balance check, the supervisor node determines the abnormal block chain node corresponding to the account, and notifies the abnormal status of the account to other nodes except the abnormal block chain node.
The transaction verification system according to claim 6 or 7, wherein the balance verification module is further configured to:

If the account fails to pass the negative balance check, the supervisor node cancels the transaction right of the abnormal block chain node on the blockchain through the preset blockchain rights management system.
The transaction verification system according to claim 6 or 7, wherein the combination verification module is further configured to:

If the smart contract corresponding to the blockchain node fails to pass the verification of the transaction parameter, the notification of the failure of the transaction event combination verification is sent to all participating nodes of the transaction event, or to the blockchain All nodes send a notification that the transaction event combination verification failed.
An electronic device comprising a processing device, a storage device, and a transaction verification system, the transaction verification system being stored in the storage device, comprising at least one computer readable instruction executable by the processing device, To achieve the following:

A1. When a node on the blockchain processes a transaction with a transaction type and a transaction amount, the node decrypts the original balance of each of the parties through the first decryption parameter sent by the transaction party of the transaction, and is based on The transaction type and the transaction amount are calculated for the original balance of each of the transaction parties to obtain a corresponding new balance, and the new balance corresponding to each of the counterparties is encrypted by the encryption parameter sent by the transaction party to obtain an encrypted new balance. And broadcasting, by the smart contract, the encrypted new balance corresponding to each of the transaction parties to each node of the blockchain;

A2. After the node of the blockchain receives the encrypted new balance corresponding to each of the parties to the broadcast, the corresponding smart contract is started to perform the combined verification;

A3. If the smart contract corresponding to each node on the blockchain verifies the combined number of the encrypted new balance corresponding to each of the counterparties, the smart contract corresponding to each node on the blockchain is based on each of the counterparties. The encrypted new balance updates its own data;

A4, calling the negative balance verification system preset by the blockchain to start multiple threads, each thread is also responsible for performing negative balance check on the balance of each account of each node in the blockchain, if each block of the block is If the negative balance of the single account balance of the node is passed, it is determined that the transaction is verified.
The electronic device of claim 11 wherein said at least one computer readable instruction is further executable by said processing device to:

Passing the second decryption parameter through the node of the blockchain corresponding to the supervisor node on the blockchain The secret key is encrypted, and the encrypted second decryption parameter is broadcasted to the supervisor node on the blockchain through the smart contract, and the second decryption parameter is used to perform the encrypted new balance corresponding to each of the counterparties. Decrypt

The supervisor node on the blockchain reads the updated encrypted new balance corresponding to each of the transaction parties, and decrypts the encrypted second decryption parameter through the secret key, and passes the decrypted second decryption parameter. Decrypting the encrypted new balance corresponding to each of the counterparties, and performing negative balance verification on each of the decrypted new balances.
The electronic device of claim 11 or 12, wherein the at least one computer readable instruction is further executable by the processing device to:

If the account fails to pass the negative balance check, the supervisor node determines the abnormal block chain node corresponding to the account, and notifies the abnormal status of the account to other nodes except the abnormal blockchain node.
The electronic device of claim 11 or 12, wherein the at least one computer readable instruction is further executable by the processing device to:

If the account fails to pass the negative balance check, the supervisor node cancels the transaction right of the abnormal block chain node on the blockchain through a preset blockchain rights management system.
The electronic device of claim 11 or 12, wherein the at least one computer readable instruction is further executable by the processing device to:

If the smart contract corresponding to the blockchain node fails to pass the verification of the transaction parameter, the notification of the failure of the transaction event combination verification is sent to all participating nodes of the transaction event, or to the blockchain All nodes send a notification that the transaction event combination verification failed.
A computer readable storage medium having stored thereon at least one computer readable instruction executable by a processing device to:

A1. When a node on the blockchain processes a transaction with a transaction type and a transaction amount, the node decrypts the original balance of each of the parties through the first decryption parameter sent by the transaction party of the transaction, and is based on The transaction type and the transaction amount are calculated for the original balance of each of the transaction parties to obtain a corresponding new balance, and the new balance corresponding to each of the counterparties is encrypted by the encryption parameter sent by the transaction party to obtain an encrypted new balance. And broadcasting, by the smart contract, the encrypted new balance corresponding to each of the transaction parties to each node of the blockchain;

A2. After the node of the blockchain receives the encrypted new balance corresponding to each of the parties to the broadcast, the corresponding smart contract is started to perform the combined verification;

A3. If the smart contract corresponding to each node on the blockchain verifies the combined number of the encrypted new balance corresponding to each of the counterparties, the smart contract corresponding to each node on the blockchain is based on each of the counterparties. The encrypted new balance updates its own data;

A4, call the block balance external preset negative balance verification system to start multiple threads, each line The process is also responsible for performing a negative balance check on the balance of a single account of each node on the blockchain. If the negative balance of the individual account balance of each node on the blockchain passes the test, it is determined that the transaction is verified.
The computer readable storage medium of claim 16 wherein said at least one computer readable instruction is further executable by said processing device to:

Encrypting the second decryption parameter by a node corresponding to the node of the blockchain and the node of the block on the blockchain, and broadcasting the encrypted second decryption parameter to the blockchain through the smart contract On the square node, the second decryption parameter is used to decrypt the encrypted new balance corresponding to each of the transaction parties;

The supervisor node on the blockchain reads the updated encrypted new balance corresponding to each of the transaction parties, and decrypts the encrypted second decryption parameter through the secret key, and passes the decrypted second decryption parameter. Decrypting the encrypted new balance corresponding to each of the counterparties, and performing negative balance verification on each of the decrypted new balances.
The computer readable storage medium of claim 16 or 17, wherein the at least one computer readable instruction is further executable by the processing device to:

If the account fails to pass the negative balance check, the supervisor node determines the abnormal block chain node corresponding to the account, and notifies the abnormal status of the account to other nodes except the abnormal blockchain node.
The computer readable storage medium of claim 16 or 17, wherein the at least one computer readable instruction is further executable by the processing device to:

If the account fails to pass the negative balance check, the supervisor node cancels the transaction right of the abnormal block chain node on the blockchain through a preset blockchain rights management system.
The computer readable storage medium of claim 16 or 17, wherein the at least one computer readable instruction is further executable by the processing device to:

If the smart contract corresponding to the blockchain node fails to pass the verification of the transaction parameter, the notification of the failure of the transaction event combination verification is sent to all participating nodes of the transaction event, or to the blockchain All nodes send a notification that the transaction event combination verification failed.