WO2021134900A1 - Système et procédé de supervision statique cachée de transaction de chaîne d'approvisionnement de blockchain - Google Patents

Système et procédé de supervision statique cachée de transaction de chaîne d'approvisionnement de blockchain Download PDF

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Publication number
WO2021134900A1
WO2021134900A1 PCT/CN2020/077628 CN2020077628W WO2021134900A1 WO 2021134900 A1 WO2021134900 A1 WO 2021134900A1 CN 2020077628 W CN2020077628 W CN 2020077628W WO 2021134900 A1 WO2021134900 A1 WO 2021134900A1
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Prior art keywords
parameter
utxo
supply chain
node device
blockchain
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PCT/CN2020/077628
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English (en)
Chinese (zh)
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辛佳骏
张骁
来鑫
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深圳市网心科技有限公司
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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
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3827—Use of message hashing
    • 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
    • G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
    • G06Q20/401—Transaction verification
    • G06Q20/4016—Transaction verification involving fraud or risk level assessment in transaction processing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/30—Computing systems specially adapted for manufacturing

Definitions

  • the present invention relates to the technical field of block chains, in particular to a static supervision system and method for block chain supply chain transaction hiding.
  • the existing blockchain supply chain system connects core enterprise node equipment, supplier node equipment, factor node equipment, and bank node equipment through the blockchain.
  • core enterprise node equipment, supplier node equipment, factorer node equipment, and bank node equipment are used as blockchain nodes to join the blockchain supply chain system, they need to be authorized to join, and there is a certain degree of trust between the blockchain nodes Basically, the credibility of the data is enhanced by the way of transaction data on the chain such as accounts receivable, bill vouchers, and mortgage goods vouchers.
  • the main purpose of the present invention is to provide a block chain supply chain transaction hidden static supervision system and method, which aims to solve the technical problem of privacy leakage and no supervision caused by the clear text of transaction data in the block chain supply chain.
  • the first aspect of the present invention provides a blockchain supply chain transaction hidden static supervision system, the system includes:
  • the core enterprise node equipment is used to determine the verification parameters that meet the EI Gamal commitment based on the payables promised by the core enterprise to the first-tier supplier and the random number selected by the core enterprise, and use the hash function to generate non-interactive based on the random number Type zero-knowledge proof parameters, sign the transaction data including the verification parameters and the non-interactive zero-knowledge proof parameters and upload them to the blockchain supply chain platform;
  • a first-level supplier node device configured to use the blockchain supply chain platform to receive the transaction data and verify the verification parameters based on the non-interactive zero-knowledge proof parameters;
  • the supervisory authority node device is used to obtain the verification parameters in the transaction data from the blockchain supply chain platform, and determine the payable based on the verification parameters to realize the supervision of the payable;
  • the blockchain supply chain platform is used to store transaction data.
  • the core enterprise node device determines the verification parameters that meet the EI Gamal commitment based on the payables promised by the core enterprise to the first-tier supplier and the random number selected by the core enterprise, including:
  • the first system parameter, the second system parameter, and the first random number are used to determine a second verification parameter that complies with the El Gamal commitment.
  • the core enterprise node device using a hash function to generate non-interactive zero-knowledge proof parameters based on the selected random number includes:
  • the challenge parameter, the first random number, the second random number, the third random number, and the payable are used to generate the non-interactive zero-knowledge proof parameter.
  • the regulatory agency node device obtains the verification parameter in the transaction data from the blockchain supply chain platform, and determines the payment due based on the verification parameter Realizing the supervision of the said payables includes:
  • Each data in the range is traversed until the payable that meets the parameters of the payable is determined.
  • the first-level supplier node device is further configured to:
  • the first-level supplier node device or the other blockchain entity node device is also used to pay the core enterprise node device to the core enterprise node device when the payable is due
  • the UTXO held is invalidated and signed or returned to the core enterprise node device.
  • system further includes:
  • At least one risk assessment agency node device used to read transaction data stored on the blockchain supply chain platform, use a pre-trained risk assessment model to perform risk assessment on the transaction data, and send the risk assessment result to The other blockchain entity node devices.
  • the second aspect of the present invention provides a static supervision method for block chain supply chain transaction concealment, and the method includes:
  • the core enterprise node equipment determines the verification parameters that meet the EI Gamal commitment based on the payables promised by the core enterprise to the first-tier supplier and the random number selected by the core enterprise, and uses the hash function to generate non-interactive zeros based on the random number.
  • the method further includes:
  • the UTXO in the transaction data is split into a first UTXO and a second UTXO through the first-level supplier node device, wherein the sum of the amount in the first UTXO and the amount in the second UTXO is equal to the The amount in UTXO;
  • the method further includes:
  • the blockchain supply chain transaction hiding static supervision system and method, by introducing the concepts of EI Gamal commitment and non-interactive zero-knowledge proof, encrypt the plaintext payables of core enterprises into confidential transactions and put them on the chain, Only both parties to the transaction can decrypt the amount in the confidential transaction, which protects the privacy of the transaction from being leaked, and protects the commercial secrets of the blockchain entity.
  • the regulatory agency obtains the first verification parameter and the second verification parameter, the same parameters are offset by calculation and brought into the private key of the regulatory agency to determine the transaction data and realize the supervision of the transaction data.
  • FIG. 1 is a schematic diagram of the architecture of a static supervision system for blockchain supply chain transaction hiding according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of the architecture of a static supervision system for block chain supply chain transaction hiding according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for static supervision of blockchain supply chain transaction concealment according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of the structure of a blockchain node device according to an embodiment of the present invention.
  • FIG. 1 it is a schematic diagram of the architecture of a static supervision system for block chain supply chain transaction hiding according to an embodiment of the present invention.
  • Blockchain supply chain transaction hidden static supervision system 1 can include, but is not limited to: blockchain supply chain platform 10, core enterprise node equipment 11, first-tier supplier node equipment 12, other blockchain entity node equipment 13 and supervision Institutional node equipment 14.
  • the other block chain entity node device 13 may include one or a combination of the following: a secondary supplier node device 13, a bank node device 13, and a factor node device 13.
  • the core enterprises, primary suppliers, secondary suppliers, banks, and factoring companies are all referred to as blockchain entities.
  • the core enterprise node equipment 11, the first-level supplier node equipment 12, the second-level supplier node equipment 13, the bank node equipment 13, and the factoring company node equipment 13 are referred to as blockchain entity node equipment.
  • the blockchain entity Before accessing the blockchain supply chain platform 10, the blockchain entity first applies for a digital certificate from a certificate authority (CA). After the CA determines the identity of the applicant, it assigns a public key to the applicant, and at the same time associates the distributed public key with the applicant's identity information and signs it to form a digital certificate and send it to the applicant. Subsequently, when the blockchain entity is connected to the blockchain supply chain platform 10, the blockchain supply chain platform 10 uses the public key of the CA to verify the signature on the digital certificate of the connected blockchain entity, and when the verification passes , The digital certificate is considered valid and the blockchain entity is allowed to access the blockchain supply chain platform 10. When the verification fails, the digital certificate is considered invalid and the blockchain entity is denied access to the blockchain supply chain Platform 10.
  • the content of the digital certificate includes: information of the electronic visa authority, public key user information, public key, signature, validity period, and so on.
  • the core enterprise node device 11 is used to determine the verification parameters that meet the EI Gamal commitment based on the payables promised by the core enterprise to the first-tier supplier and the random number selected by the core enterprise, and based on the random number
  • a hash function is used to generate non-interactive zero-knowledge proof parameters, and transaction data including the verification parameters and the non-interactive zero-knowledge proof parameters are signed and uploaded to the blockchain supply chain platform 10.
  • the core enterprise purchases the products of the first-tier supplier and promises to pay
  • the first-tier supplier may purchase the products of the second-tier supplier based on a part of the said payable
  • the second-tier supplier may further promise After splitting the payables, purchase the products of other secondary suppliers, and so on.
  • Factors can purchase payables held by primary and secondary suppliers.
  • the bank can provide loans based on the supplier's payables.
  • the core company After the core company purchases the products of the first-tier supplier and promises to pay, the core company encrypts the payables through the core company node device 11 to obtain confidential transactions, ensuring that the core company and the first-tier supplier Privacy of transactions between.
  • the core enterprise node device 11 determines that the verification parameters that meet the EI Gamal commitment based on the payables promised by the core enterprise to the first-tier supplier and the random number selected by the core enterprise include:
  • the first system parameter g, the second system parameter n, and the third system parameter h are all public parameters.
  • the first system parameter g is an elliptic curve group generator
  • the second system parameter n may be a natural number
  • the third system parameter h g t modn.
  • the first random number r is a number randomly selected by the core enterprise. Since both the first verification parameter E and the second verification parameter F are encrypted data, and the first verification parameter E and the second verification parameter F cannot be directly used to determine the payable x, the core enterprise node device 11 sets the first verification parameter E and the second verification parameter F.
  • the first-level supplier node device 12 can obtain the first verification parameter E and the second verification parameter F after acquiring the transaction data. And use EI Gamal promise to verify the authenticity of transaction data.
  • the core enterprise node device 11 using a hash function to generate non-interactive zero-knowledge proof parameters based on the selected random number includes:
  • the primary supplier node device 12 is configured to use the blockchain supply chain platform to receive the transaction data and verify the verification parameters based on the non-interactive zero-knowledge proof parameters.
  • the first-level supplier node device 12 verifies the authenticity of the first verification parameter and the second verification parameter by means of non-interactive zero-knowledge proof, thereby ensuring that the payable calculated by the first verification parameter and the second verification parameter is true data.
  • the first-level supplier receives the verification parameters sent by the node device 11 of the core enterprise through the node device 12 of the first-level supplier.
  • the core enterprise can inform the first-tier supplier of the payable x and the first random number r through key agreement and other methods.
  • the first-level supplier node device 12 is also used to split the UTXO in the transaction data into a first UTXO and a second UTXO, based on the first UTXO and the second UTXO.
  • UTXO conducts transactions with other blockchain entity node devices.
  • the primary supplier node device 12 sends the transaction data to the blockchain supply chain platform 10 for storage.
  • the sum of the amount in the first UTXO and the amount in the second UTXO is equal to the amount in the UTXO.
  • the first-tier supplier can split the UTXO in the confidential transaction and trade it to the second-tier supplier, factoring company, or use the bank for mortgage loans.
  • the secondary supplier, factor or bank can further split and trade the UTXO after receiving the split. Once the split UTXO is used, the original UTXO is no longer available, but the transaction data about the original UTXO will still be recorded on the blockchain supply chain platform for traceability and inquiries.
  • the first-tier supplier node device 12 is also used to perform range certification on the first UTXO and the second UTXO based on Bulletproof.
  • the amount in UTXO2 is a legal value, that is, the amount in UTXO is a positive number within a certain range.
  • the splitting of UTXO into two sub-UTXOs is taken as an example.
  • the first-tier supplier node device can also split UTXO into 3 or more parts for more flexibility. Deal with secondary suppliers.
  • the first-level supplier node device 12 or the other blockchain entity node device 13 is also used to pay the core enterprise node device when the payable is due The payable, in response to the successful redemption of the payable, invalidate the UTXO held or return it to the core enterprise node device.
  • the due time stamp of the payment is marked in the UTXO.
  • the core enterprise When the core enterprise receives the information of redemption of the payable through the core enterprise node device 11, it confirms whether the payable is due. After confirming that the due payment is due, the debt is redeemed. After receiving the debt, the blockchain entity signs, indicating that the debt has been received. When or after receiving the debt, the blockchain entity holding the UTXO invalidates the UTXO signature or returns it to the core enterprise to form a complete transaction data record on the blockchain supply chain platform 10.
  • the regulatory agency node device 14 is used to obtain the verification parameters in the transaction data from the blockchain supply chain platform 10, and realize the processing of the verification parameters based on the non-interactive zero-knowledge proof parameters Supervision of funds.
  • the regulatory agency node device 14 obtains the verification parameters in the transaction data from the blockchain supply chain platform, and implements the verification based on the non-interactive zero-knowledge proof parameters.
  • the supervision of payables in the verification parameters includes:
  • Each data in the range is traversed until the payable that meets the parameters of the payable is determined.
  • the value of the parameter g x including transaction data can be determined by the following calculation, because in blockchain transactions, transaction data is usually in a limited Within the data range of, by traversing each data in the data range, the data is substituted into x until the x that matches the value of g x is obtained, and the x is the transaction data.
  • the node device of the supervisory authority can offset the same parameters through calculation and bring in the private key to determine the payment and realize the supervision of the corresponding payment.
  • the payables are usually within a limited data range. By traversing each data in the data range, the data is brought into the payable x until the x that matches the value of g x is obtained. This x is the payable.
  • the blockchain supply chain platform 10, the core enterprise node device 11, the first-tier supplier node device 12, and the regulatory agency node device 14 in the static supervision system 1 for the blockchain supply chain transaction hiding must If it exists, the other blockchain entity node device 13 optionally exists. That is, the secondary supplier node device, bank node device, and factor node device can optionally exist in the blockchain supply chain transaction hidden static supervision system 1.
  • FIG. 2 it is a schematic diagram of another architecture of the static supervision system for block chain supply chain transaction hiding according to an embodiment of the present invention.
  • the blockchain supply chain transaction hidden static supervision system 1 includes the blockchain supply chain platform 10, core enterprise node equipment 11, first-tier supplier node equipment 12, and other blockchain entity node equipment 13, which are described in Figure 1.
  • the regulatory agency node device 14 may also include at least one risk assessment agency node device 15.
  • the at least one risk assessment agency node device 15 is used to read transaction data stored on the blockchain supply chain platform 10, use a pre-trained risk assessment model to perform risk assessment on the transaction data, and The risk assessment result is sent to the other blockchain entity node device 13.
  • At least one risk assessment agency node device 15 can obtain the historical transaction data recorded on the blockchain supply chain platform 10 in advance, and train a risk assessment model based on the historical transaction data to evaluate the value of the payable in each transaction data.
  • At least one risk assessment agency node device 15 When at least one risk assessment agency node device 15 reads the newly recorded transaction data on the blockchain supply chain platform 10, it uses a risk assessment model to evaluate the value of the payable in the newly recorded transaction data, and evaluate the risk The result is sent to potential purchasers of UTXO (that is, the payable of the core enterprise) corresponding to the transaction data.
  • the potential purchasers may include, but are not limited to, secondary suppliers, factoring companies, banks, etc.
  • the blockchain supply chain platform 10 may be a blockchain system based on any UTXO model and a blockchain system supporting the UTXO account model.
  • the blockchain supply chain system 1 may further include: a data decryption module, a UTXO amount range certification module, a blockchain wallet, a lightweight wallet, a statistical analysis tool, an entity list, etc.
  • the blockchain supply chain privacy transaction static supervision system described in this embodiment introduces the concepts of EI Gamal commitment and non-interactive zero-knowledge proof, encrypting the core company’s clear text payables into confidential transactions and uploading them to the chain. Only both parties to the transaction It can decrypt the amount in the confidential transaction, protect the transaction privacy from being leaked, and protect the commercial secrets of the blockchain entity. After the regulatory agency obtains the first verification parameter and the second verification parameter, the same parameters are offset by calculation and brought into the private key of the regulatory agency to determine the transaction data and realize the supervision of the transaction data.
  • FIG. 3 is a schematic flowchart of a method for static supervision of transaction hiding in a blockchain supply chain disclosed in an embodiment of the present invention.
  • the blockchain supply chain transaction hiding static supervision system specifically includes the following steps. According to different needs, the order of the steps in the flowchart can be changed, and some steps can be omitted.
  • the core enterprise node device determines the verification parameters that meet the EI Gamal commitment based on the payables promised by the core enterprise to the first-tier supplier and the random number selected by the core enterprise.
  • the core enterprise purchases the products of the first-tier supplier and promises to pay
  • the first-tier supplier can purchase the products of the second-tier supplier based on a part of the said payables
  • the second-tier supplier can further split the payables promised by the first-tier supplier Purchase products from other second-tier suppliers after distribution, and so on.
  • Factors can purchase payables held by primary and secondary suppliers.
  • the bank can provide loans based on the supplier's payables.
  • the core company After the core company purchases the products of the first-tier supplier and promises to pay, the core company encrypts the payables through the core company node device 11 to obtain confidential transactions, ensuring that the core company and the first-tier supplier Privacy of transactions between.
  • the core enterprise node device 11 determines the verification parameters that meet the EI Gamal commitment based on the payable promised by the core enterprise to the first-tier supplier and the random number selected by the core enterprise, including:
  • the first system parameter g, the second system parameter n, and the third system parameter h are all public parameters.
  • the first system parameter g is an elliptic curve group generator
  • the second system parameter n may be a natural number
  • the third system parameter h g t modn.
  • the first random number r is a number randomly selected by the core enterprise. Since both the first verification parameter E and the second verification parameter F are encrypted data, and the first verification parameter E and the second verification parameter F cannot be directly used to determine the payable x, the core enterprise node device 11 sets the first verification parameter E and the second verification parameter F.
  • the first-level supplier node device 12 can obtain the first verification parameter E and the second verification parameter F after acquiring the transaction data. And use EI Gamal promise to verify the authenticity of transaction data.
  • S32 Generate a non-interactive zero-knowledge proof parameter based on the random number by the core enterprise node device using a hash function.
  • the core enterprise node equipment uses non-interactive zero-knowledge proof parameters to generate challenge parameters.
  • the regulatory agency node equipment and the first-level supplier node equipment can directly obtain the challenge parameters, which can enable subsequent verification of the first verification parameter and the second verification parameter. Verification is more convenient.
  • the core enterprise node device 11 using a hash function to generate non-interactive zero-knowledge proof parameters based on the selected random number includes:
  • S33 Sign the transaction data including the verification parameter and the non-interactive zero-knowledge proof parameter through the core enterprise node device and upload it to the blockchain supply chain platform.
  • the core enterprise uses digital signature technology to sign the verification parameters and the non-interactive zero-knowledge proof parameters through the core enterprise node equipment.
  • Digital signature technology is based on asymmetric encryption algorithm and message digest algorithm to achieve the authentication of the source and integrity of the message, and at the same time, it is a guarantee that the signer cannot deny.
  • There are two roles in a digital signature system one is the signer of the message and the other is the authenticator of the message.
  • the signer of the message can sign the information digest of a message according to his private key, and the authenticator of the message verifies the information digest of a message according to his public key. If the verification is passed, it can be proved that the source of the message is the signer of the message, the information digest of the message is the same and the signer cannot deny it.
  • the first-level supplier node device 12 verifies the authenticity of the first verification parameter and the second verification parameter by means of non-interactive zero-knowledge proof, thereby ensuring that the payable calculated by the first verification parameter and the second verification parameter is true data.
  • S35 Obtain the verification parameters in the transaction data from the blockchain supply chain platform through a regulatory agency node device, and implement supervision of the payables in the verification parameters based on the non-interactive zero-knowledge proof parameters.
  • the regulatory agency node device 14 obtains the verification parameter in the transaction data from the blockchain supply chain platform, and implements it based on the non-interactive zero-knowledge proof parameter
  • the supervision of the payables in the verification parameters includes:
  • Each data in the range is traversed until the payable that meets the parameters of the payable is determined.
  • the value of the parameter g x including transaction data can be determined by the following calculation, because in blockchain transactions, transaction data is usually in a limited Within the data range of, by traversing each data in the data range, the data is substituted into x until the x that matches the value of g x is obtained, and the x is the transaction data.
  • the node device of the supervisory authority can offset the same parameters through calculation and bring in the private key to determine the payment and realize the supervision of the corresponding payment.
  • the payables are usually within a limited data range. By traversing each data in the data range, the data is brought into the payable x until the x that matches the value of g x is obtained. This x is the payable.
  • the method further includes:
  • the UTXO in the transaction data is split into a first UTXO and a second UTXO through the first-level supplier node device, wherein the sum of the amount in the first UTXO and the amount in the second UTXO is equal to the The amount in UTXO;
  • the first-tier supplier can split the UTXO in the confidential transaction and trade it to the second-tier supplier, factoring company, or use the bank for mortgage loans.
  • the secondary supplier, factor or bank can further split and trade the UTXO after receiving the split. Once the split UTXO is used, the original UTXO is no longer available, but the transaction data about the original UTXO will still be recorded on the blockchain supply chain platform for traceability and inquiries.
  • the amount in UTXO2 is a legal value, that is, the amount in UTXO is a positive number within a certain range.
  • the method further includes:
  • At least one risk assessment agency node device 15 When at least one risk assessment agency node device 15 reads the newly recorded transaction data on the blockchain supply chain platform 10, it uses a risk assessment model to evaluate the value of the payable in the newly recorded transaction data, and evaluate the risk The result is sent to potential purchasers of UTXO (that is, the payable of the core enterprise) corresponding to the transaction data.
  • the potential purchasers may include, but are not limited to, secondary suppliers, factoring companies, banks, etc.
  • the blockchain supply chain platform 10 may be a blockchain system based on any UTXO model and a blockchain system supporting the UTXO account model.
  • the static supervision method for private transactions in the blockchain supply chain described in this embodiment introduces the concepts of EI Gamal commitment and non-interactive zero-knowledge proof, encrypts the core company’s clear text payables into confidential transactions and puts them on the chain. Only both parties to the transaction It can decrypt the amount in the confidential transaction, protect the transaction privacy from being leaked, and protect the commercial secrets of the blockchain entity. After the regulatory agency obtains the first verification parameter and the second verification parameter, the same parameters are offset by calculation and brought into the private key of the regulatory agency to determine the transaction data and realize the supervision of the transaction data.
  • FIG. 4 is a schematic diagram of the internal structure of a blockchain node device disclosed in an embodiment of the present invention.
  • the blockchain node device 4 may include a memory 41, a processor 42, a bus 43, and a transceiver 44.
  • the blockchain node device 4 may be a core enterprise node device, a regulatory agency node device, or a first-tier supplier node device, other blockchain entities (for example, a second-tier supplier, bank, factor) Node equipment, etc.
  • the blockchain node device 4 is a core enterprise node device, the function of the core enterprise node device described in Embodiment 1 or Embodiment 2 is performed;
  • the blockchain node device 4 is a regulatory agency node device , Execute the function of the regulatory agency node device described in the first embodiment or the second embodiment;
  • the blockchain node device 4 is the first-tier supplier node device, execute the function described in the first embodiment or the second embodiment
  • the function of the first-level supplier node device; when the blockchain node device 4 is another blockchain entity node device, the function of the other blockchain entity node device described in the first embodiment or the second embodiment is performed.
  • the memory 41 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, and the like.
  • the memory 41 may be an internal storage unit of the blockchain node device 4 in some embodiments, for example, the hard disk of the blockchain node device 4.
  • the memory 41 may also be an external storage device of the blockchain node device 4, for example, a plug-in hard disk equipped on the blockchain node device 4, a smart memory card (Smart Media Card, SMC). ), Secure Digital (SD) card, Flash Card, etc.
  • the memory 41 may also include not only the internal storage unit of the blockchain node device 4, but also an external storage device.
  • the memory 41 can be used not only to store application programs and various data installed in the blockchain node device 4, but also to temporarily store data that has been output or will be output.
  • the processor 42 may be a central processing unit (CPU), controller, microcontroller, or microprocessor in some embodiments, and is used to run program codes or process data stored in the memory 41.
  • CPU central processing unit
  • controller microcontroller
  • microprocessor in some embodiments, and is used to run program codes or process data stored in the memory 41.
  • the bus 43 may be a peripheral component interconnect standard (PCI) bus or an extended industry standard architecture (EISA) bus, etc.
  • PCI peripheral component interconnect standard
  • EISA extended industry standard architecture
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 4 to represent it, but it does not mean that there is only one bus or one type of bus.
  • the blockchain node device 4 may also include a network interface, and the network interface may optionally include a wired interface and/or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is usually used in the block
  • the link node device 4 establishes a communication connection with other dispatch servers.
  • the blockchain node device 4 may also include a user interface.
  • the user interface may include a display (Display) and an input unit, such as a keyboard (Keyboard).
  • the user interface may also include a standard wired interface, wireless interface.
  • the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an organic light-emitting diode (OLED) touch device, and the like.
  • the display may also be called a display screen or a display unit, which is used to display the messages processed in the dispatch server and to display a visualized user interface.
  • FIG. 4 only shows the blockchain node device 4 with components 41-44.
  • the structure shown in FIG. 4 does not constitute a limitation on the blockchain node device 4. It may be a bus-type structure or a star-shaped structure.
  • the blockchain node device 4 may also include fewer or more components than shown in the figure, or a combination of certain components, or a different component arrangement.
  • Other existing or future electronic products that can be adapted to the present invention should also be included in the protection scope of the present invention, and are included here by reference.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (for example, coaxial cable, optical fiber, digital subscriber line) or wireless (for example, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or application program functional unit.
  • the integrated unit is implemented in the form of an application function unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • a computer readable storage medium includes several instructions to make a dispatch server (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, hard disk, Read-Only Memory (Read-Only Memory, ROM), magnetic disk or optical disk and other media that can store program codes.

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Abstract

Un système de supervision statique cachée de transaction de chaîne d'approvisionnement de blockchain est divulgué. Le système comprend un dispositif de nœud d'entreprise central (11) qui permet de déterminer, sur la base d'un compte client et d'un nombre aléatoire, un paramètre de vérification conforme à un engagement Gamal EI, de générer un paramètre de preuve à connaissance nulle non interactif à l'aide d'une fonction de hachage et sur la base du nombre aléatoire, et de signer des données de transaction comprenant le paramètre de vérification et le paramètre de preuve à connaissance nulle non interactif et de les charger vers une plateforme de chaîne d'approvisionnement de blockchain (10); un dispositif de nœud de fournisseur de premier niveau (12) qui permet de recevoir les données de transaction et de vérifier le paramètre de vérification sur la base du paramètre de preuve à connaissance nulle non interactif; un dispositif de nœud d'institution de supervision (14) qui permet de déterminer le compte client sur la base du paramètre de vérification de façon à superviser le compte client; et la plateforme de chaîne d'approvisionnement de blockchain (10) qui permet de stocker les données de transaction. L'invention concerne en outre un procédé de supervision statique cachée de transaction de chaîne d'approvisionnement de blockchain. Au moyen du procédé, un compte client dans une chaîne d'approvisionnement de blockchain peut être chiffré et chaîné pour éviter une fuite de confidentialité, et le compte client est supervisé.
PCT/CN2020/077628 2019-12-31 2020-03-03 Système et procédé de supervision statique cachée de transaction de chaîne d'approvisionnement de blockchain WO2021134900A1 (fr)

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