WO2023221350A1 - Système, procédé et plateforme d'enregistrement de droit d'auteur de code basé sur une chaîne de blocs - Google Patents

Système, procédé et plateforme d'enregistrement de droit d'auteur de code basé sur une chaîne de blocs Download PDF

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Publication number
WO2023221350A1
WO2023221350A1 PCT/CN2022/120150 CN2022120150W WO2023221350A1 WO 2023221350 A1 WO2023221350 A1 WO 2023221350A1 CN 2022120150 W CN2022120150 W CN 2022120150W WO 2023221350 A1 WO2023221350 A1 WO 2023221350A1
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WIPO (PCT)
Prior art keywords
feature set
registration
blockchain
data package
client
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PCT/CN2022/120150
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English (en)
Chinese (zh)
Inventor
陈小娜
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陈小娜
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Publication of WO2023221350A1 publication Critical patent/WO2023221350A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/105—Arrangements for software license management or administration, e.g. for managing licenses at corporate level
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures

Definitions

  • This application relates to the field of data processing technology, and in particular to a blockchain-based code copyright registration system, method and platform.
  • the purpose of the present invention is to provide a blockchain-based code copyright registration system, method and platform in view of the shortcomings of the existing technology.
  • this application provides a blockchain-based code copyright registration system, which includes a client and a blockchain platform, including:
  • the client is used to send a registration data packet to the blockchain platform, wherein the registration data packet includes a feature set, and the feature set is generated by the client;
  • the blockchain platform is used to verify the originality of the feature set; when the feature set is successfully verified, receive the feature set and perform registration services related to the feature set; when the feature set is successfully verified, When the feature set verification fails, the feature set is rejected;
  • the client is also used to send a change data package to the blockchain platform;
  • the change data package is generated by the client;
  • the change data package includes the registration voucher and the first digital signature;
  • the blockchain platform is also used to perform signature verification on the change data package; when the change data package is successfully verified, execute the change business related to the registration certificate; when the change data package is verified On failure, reject the change packet.
  • the client is also configured to obtain source code data and initialize the feature set before sending a registration data package to the blockchain platform; decompose the source code data into several feature vectors; and for each feature vector. Perform a hash operation on each of the feature vectors to obtain a set of hash values; weight the hash value corresponding to each feature vector; traverse the set, and compare the features according to each hash value in the set.
  • the blockchain platform is specifically used to obtain a feature set set; traverse the feature set set, perform a Hamming operation on the current feature set and the feature set, and obtain the Hamming distance; when the Hamming distance exists When the Hamming distance is less than or equal to 3, it is determined that the originality verification fails; when the Hamming distance does not exist and is less than or equal to 3, it is determined that the originality verification is successful.
  • the registration data package also includes a timestamp and a rights public key
  • the registration service specifically includes:
  • the blockchain platform performs a hash operation based on the feature set to generate a digital fingerprint; the blockchain platform uses the digital fingerprint as a Key value, and uses the feature set, the timestamp and the rights public key as a Value value is stored in the storage domain.
  • the change data package further includes a second digital signature
  • the registration certificate includes the target public key and the digital fingerprint
  • the signature verification specifically includes:
  • the blockchain platform performs verification based on the rights public key, the registration certificate and the first digital signature
  • the blockchain platform performs verification based on the target public key, the registration certificate and the second digital signature
  • the change service specifically includes: the blockchain platform obtains the corresponding public rights key based on the digital fingerprint search; and replaces the value of the public rights key with the value of the target public key.
  • this application provides a blockchain-based code copyright registration method, which method includes:
  • the client sends a registration data packet to the blockchain platform, where the registration data packet includes a feature set, and the feature set is generated by the client;
  • the blockchain platform performs originality verification on the feature set; when the feature set is successfully verified, it receives the feature set and performs registration services related to the feature set; when the feature set fails to be verified , reject the feature set;
  • the client sends a change data package to the blockchain platform;
  • the change data package is generated by the client;
  • the change data package includes the registration voucher and the first digital signature;
  • the blockchain platform performs signature verification on the change data package; when the verification of the change data package is successful, executes the change business related to the registration certificate; when verification of the change data package fails, rejects Receive the change packet
  • this application provides a blockchain-based code copyright registration platform, which includes:
  • the first acquisition module is used to acquire the registration data packet sent by the client; wherein the registration data packet includes a feature set, and the feature set is generated by the client;
  • An originality verification module used to verify the originality of the feature set
  • a registration module configured to receive the feature set and perform registration services related to the feature set when the feature set is successfully verified; to reject the feature set when the feature set fails to be verified;
  • the second acquisition module is used to obtain the change data packet sent by the client; the change data packet is generated by the client; the change data packet includes the registration voucher and the first digital signature;
  • a signature verification module used to perform signature verification on the change data package
  • a change module configured to perform change services related to the registration voucher when the change data package is successfully verified; and to reject the change data package when the change data package fails to be verified.
  • One aspect of this application provides a computer device, including a memory and a processor.
  • the memory stores a computer program.
  • the computer program When executed by the processor, it causes the processor to execute the method in one aspect of this application.
  • the present application provides a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program.
  • the computer program includes program instructions. When executed by a processor, the program instructions cause the processor to perform the above-mentioned aspect. method.
  • the code copyright registration system, method and platform based on the blockchain provided by the present invention achieve the effect of reducing the storage pressure of the blockchain and calculating gas costs by storing the feature set used to judge originality in the blockchain.
  • the data fingerprint of the feature set is also calculated and used as an identification of copyright to facilitate the confirmation of rights.
  • double signature verification is set up to ensure the accuracy of rights changes and prevent irreversible losses caused by the irreversibility of the blockchain network. Realize unified management of code copyright.
  • Figure 1 is a schematic structural diagram of a blockchain-based code copyright registration system provided by an embodiment of the present application
  • Figure 2 is a schematic structural diagram of a blockchain-based code copyright registration system provided by an embodiment of the present application
  • Figure 3 is a schematic diagram showing the feature set generation process provided by an embodiment of the present application.
  • Figure 4 is a schematic diagram of a data interaction process scenario between a client and a blockchain platform provided by an embodiment of the present application
  • Figure 5 is a flow chart of a blockchain-based code copyright registration method provided by an embodiment of the present application.
  • Figure 6 is a schematic structural diagram of a blockchain-based code copyright registration platform provided by an embodiment of the present application.
  • Figure 7 is a schematic structural diagram of a computer device provided by an embodiment of the present application.
  • Blockchain technology is the technical basis for realizing distributed applications.
  • Blockchain technology uses hash pointers instead of traditional pointers and stores digital asset transactions in the block body. It is a transaction-driven state machine.
  • smart contract refers to a piece of status code running on the blockchain system.
  • the code logic defines the content of the contract. It is a special protocol that is used when formulating contracts in the blockchain and contains code functions (Function). , and can also interact with other contracts, make decisions, store data and other functions.
  • Smart contracts provide verification and execution of the conditions specified in the contract. Smart contracts allow trusted transactions to be made without third parties, which are traceable and irreversible.
  • Figure 1 is a schematic structural diagram of a blockchain-based code copyright registration system provided by an embodiment of the present application.
  • the network architecture may include a blockchain network 10 and a terminal 20.
  • the blockchain network 10 may include multiple blockchain nodes.
  • the logic code of the smart contract runs in the blockchain nodes.
  • the multiple blockchain nodes can interact with each other in data.
  • the link node may include n nodes such as node N1, node N2,... and node Nn.
  • the terminal 20 may include n client nodes such as node C1, node C2, ... and node Cn.
  • the client nodes included in the terminal 20 are also nodes in the blockchain.
  • the nodes in the blockchain network 10 are usually full nodes, and the nodes in the terminal 20 are usually light nodes.
  • all nodes in the blockchain are divided into blockchain network 10 and terminal 20.
  • Full nodes save all the contents of the entire block, while light nodes only save the header information of the block.
  • the light node only needs to store the block header information, and the full node stores all the contents of the block.
  • Merkle Proof can be used to go from the transaction to the root.
  • a path of a node is Merkle Proof, also known as Merkle Path.
  • the full node sends the entire Merkle Proof to the light node.
  • the light node can calculate the root hash value based on it and compare it with its own saved one to verify whether the transaction has been written. into the blockchain. As long as all hashes along this path are correct, the content has not been modified.
  • a blockchain node in the blockchain network 10 or a node in the terminal 20 can be composed of a server or a terminal device.
  • the server used to constitute the 10 nodes of the blockchain network can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or it can provide cloud services, cloud databases, cloud computing, cloud Cloud servers for basic cloud computing services such as functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms.
  • the server used to form the terminal node 20 is usually a terminal device, and the terminal device can be: a smart terminal such as a smart phone, a tablet computer, a notebook computer, or a desktop computer.
  • Figure 2 is a schematic structural diagram of a blockchain-based code copyright registration system provided by an embodiment of the present application.
  • a code copyright registration system based on blockchain including client 100 and blockchain platform 200, including:
  • the client 100 is configured to send a registration data packet to the blockchain platform 200, where the registration data packet includes a feature set, and the feature set is generated by the client 100;
  • the blockchain platform 200 can obtain the registration data package sent by the client 100.
  • the registration data package sent by the client 100 to the blockchain platform 200 mainly includes the feature set of the source code data.
  • the source code data can be a document containing source code data
  • the feature set refers to a feature set with code arrangement characteristics obtained according to a certain algorithm operation based on the source code data.
  • the blockchain platform 200 is a decentralized and distributed platform based on smart contracts, if the client 100 directly uploads source code data to the blockchain platform 200, it will not only greatly increase the storage of each blockchain node The pressure will also cause the blockchain platform 200 to greatly increase the calculation amount, reduce the operating efficiency, and generate a large amount of gas fees, making the entire system only theoretically feasible. Therefore, pre-producing the feature set of source code data in the client 100 will greatly reduce the storage pressure and computing pressure of the blockchain platform 200 and save gas costs.
  • Client 100 is also used for:
  • the source code data may be uploaded to the client 100 by the user.
  • the feature set can be a binary value with a data width of 64 bits.
  • the decomposition process of source code data can be achieved through word segmentation or bigram, and then five levels of weights, such as 1-5, are set for each feature vector.
  • each bit on the hash value is traversed.
  • the hash value and the weight value are multiplied.
  • the hash value and the weight are multiplied. Values are multiplied negatively.
  • Figure 3 is a schematic diagram illustrating the feature set generation process provided by an embodiment of the present application.
  • the blockchain platform 200 decomposes the source code data into several feature vectors through word segmentation or bigram and gives each feature vector a certain weight. Then, it performs a hash operation on the feature vector and multiplies it by the weight value. Obtain the set of hash values h1, h2...hn, and then accumulate and merge the sets of hash values, that is, add the first value of h1, h2...hn to obtain the feature set No. The value of one digit, the value of the second digit of h1, h2...hn are added to obtain the value of the second digit of the feature set, and so on until the values of all corresponding bits are accumulated to obtain the first stage feature set. , and finally perform dimensionality reduction on the first-stage feature set, that is, if the value of a specific bit is greater than 1, it is set to 1, otherwise it is set to 0, and the final feature set can be obtained.
  • the above process is the feature set generation process.
  • the feature set obtained by performing a series of operations on the source code data such as word segmentation, hashing, weighting, accumulation, and dimensionality reduction can not only save the source code document data features, but also occupy a small space, achieving The feature set is easy to store in the blockchain platform 200 and consumes less gas.
  • the blockchain platform 200 is used to verify the originality of the feature set; when the feature set is successfully verified, receive the feature set and perform registration services related to the feature set; when the feature set is successfully verified, When the verification of the feature set fails, the feature set will be rejected;
  • the blockchain platform 200 can verify the originality of the feature set.
  • the blockchain platform 200 can register the feature set as a copyright, and the smart contract in the blockchain platform 200 can write the feature set data into the storage domain.
  • the blockchain platform 200 When a block is generated, relevant transactions are published to the blockchain network 10 to achieve announcement and non-tampering functions.
  • Blockchain platform 200 is specifically used for:
  • the feature set set may be the sum of all registered feature sets in the blockchain platform 200 .
  • the current feature set may be the feature set currently read when the blockchain platform 200 traverses the feature set set and compared with the feature set that needs to be registered.
  • the code distance also known as the Hamming distance.
  • the above process is the originality verification process. It determines whether the originality verification is successful by comparing the feature sets that need to be registered with the feature sets that have been registered in the blockchain platform 200 and calculating the Hamming distance. This method can greatly reduce the computing pressure of the blockchain platform 200 and reduce gas expenses.
  • the registration data package also includes a timestamp and a rights public key.
  • the registration services specifically include:
  • the blockchain platform 200 performs a hash operation according to the feature set to generate a digital fingerprint; the blockchain platform 200 uses the digital fingerprint as a Key value, and publicizes the feature set, the timestamp and the rights.
  • the key is stored in the storage domain as the Value value.
  • the blockchain platform 200 can perform a hash operation based on the feature set to generate a digital fingerprint.
  • the digital fingerprint is used as a unique identifier of copyright and plays a role in rapid retrieval.
  • due to the hash Anti-collision characteristics can clarify the ownership of rights.
  • the blockchain platform 200 can also use the timestamp in the registration data package as the copyright application date, and use the rights public key as an identifier of the rights holder.
  • the rights public key can be the public key address of the client 100, or it can It is the public key address of the right holder entered by the user.
  • the blockchain platform 200 can store the above data in the storage domain of the smart contract in the form of HashMap, and can use the digital fingerprint as the Key value, and the feature set, timestamp and rights public key as the Value value to facilitate quick search. .
  • the above process is the copyright registration process.
  • a digital fingerprint is generated based on the feature set as the unique identifier of copyright, which can quickly index and clarify rights.
  • the client 100 is also used to send a change data package to the blockchain platform 200; the change data package is generated by the client 100; the change data package includes the registration voucher and the first digital signature;
  • the blockchain platform 200 can obtain the registration certificate and the first digital signature, and then verify the legality of the change data package based on the registration certificate and the first digital signature.
  • the registration voucher is used to record information related to the change business, and the first digital signature can be obtained by the copyright owner using the private key to sign the registration voucher.
  • the blockchain platform 200 is also used to perform signature verification on the change data package; when the verification of the change data package is successful, execute the change business related to the registration certificate; when the change data package is successfully verified, When verification fails, the change data packet will be rejected;
  • the blockchain platform 200 can read the registration voucher and the first digital signature contained in the change data package, and then perform signature verification on the registration voucher.
  • the registration certificate may include the digital fingerprint of the copyright that needs to be changed.
  • the blockchain platform 200 can obtain the corresponding rights public key based on the digital fingerprint. The blockchain platform 200 will then use the rights public key to decrypt the first digital signature. The data obtained is then compared with the registration voucher, and when the two match, the signature verification is successful.
  • the registration certificate also includes the target public key, which is the public key address of the copyright assignee.
  • the blockchain platform 200 can modify the rights address corresponding to the digital fingerprint to the target public key value.
  • the above process is the signature verification and change business process.
  • signature verification By setting up signature verification, the authenticity of the change business can be guaranteed. Malicious nodes cannot pass the verification without obtaining the private key corresponding to the right public key, thus ensuring the security of the system.
  • the registration voucher is generated unilaterally by the right holder. If the copyright changes are carried out by the two parties, the process of generating the registration voucher may be changed by the right holder. The target public key is incorrectly recorded, resulting in the transferee being unable to obtain the copyright.
  • the change data package also includes a second digital signature.
  • the registration certificate includes the target public key and the digital fingerprint.
  • the signature verification specifically includes:
  • the blockchain platform 200 performs verification based on the rights public key, the registration certificate and the first digital signature
  • the blockchain platform 200 performs verification based on the target public key, the registration certificate and the second digital signature;
  • the second digital signature may be obtained by the copyright transferee using the transferee's private key to sign the registration certificate, and the transferee's private key and the target public key are combined into a public-private key pair.
  • the blockchain platform 200 can obtain the corresponding rights public key based on the digital fingerprint. The blockchain platform 200 will then use the rights public key to decrypt the first digital signature to compare the data with the registration certificate. When the two match Signature verification is successful.
  • the blockchain platform 200 can obtain the target public key based on the registration voucher. The blockchain platform 200 will then use the target public key to decrypt the second digital signature and compare the data obtained with the registration voucher. When the two match, the signature Verification successful.
  • the blockchain platform 200 can perform the change business associated with the registration certificate.
  • the registration certificate is generated after confirmation by both the right holder and the transferee.
  • the signature information of both parties needs to be confirmed to ensure the accuracy of the transferee.
  • symmetric encryption involves the management of symmetric keys, especially the distribution of symmetric keys. It requires the communicating parties to exchange a shared symmetric key through another secure channel before communicating in order to be safe. The ciphertext is transmitted through unsecured channels; once the symmetric key is stolen, the encryption will be immediately invalid.
  • the blockchain platform 200 obtains the corresponding rights public key according to the digital fingerprint search; replaces the value of the rights public key with the value of the target public key.
  • the blockchain platform 200 quickly locates the rights public key through the digital fingerprint in the registration certificate, thereby realizing the system's rapid change of the copyright owner.
  • the following takes the data interaction between the client 100 and the blockchain platform 200 as an example to perform a detailed description of the embodiments of this application.
  • Figure 4 is a schematic diagram of a data interaction process scenario between a client 100 and a blockchain platform 200 provided by an embodiment of the present application.
  • the client 100 generates a feature set based on the source code data
  • the source code data can be a document containing source code data
  • the feature set refers to a feature set with code arrangement characteristics obtained according to a certain algorithm operation based on the source code data.
  • the client 100 sends a registration data packet to the blockchain platform 200;
  • the blockchain platform 200 can obtain the registration data package sent by the client 100.
  • the registration data package sent by the client 100 to the blockchain platform 200 mainly includes the feature set of the source code data.
  • the blockchain platform 200 performs originality verification and performs registration business
  • the blockchain platform 200 can verify the originality of the feature set.
  • the blockchain platform 200 can register the feature set as a copyright, and the smart contract in the blockchain platform 200 can write the feature set data into the storage domain.
  • the blockchain platform 200 When a block is generated, relevant transactions are published to the blockchain network 10 to achieve announcement and non-tampering functions.
  • the blockchain platform 200 returns the digital fingerprint to the client 100;
  • digital fingerprint is used as the unique identification of copyright, which plays a role in quick retrieval.
  • digital fingerprint is used as the unique identification of copyright, which plays a role in quick retrieval.
  • the ownership of rights can be clarified.
  • the client 100 sends a change data packet to the blockchain platform 200;
  • the blockchain platform 200 can obtain the registration certificate and the first digital signature, and then verify the legality of the change data package based on the registration certificate and the first digital signature.
  • the blockchain platform 200 performs signature verification and executes the change business.
  • the registration certificate also includes the target public key, which is the public key address of the copyright assignee.
  • the blockchain platform 200 can modify the rights address corresponding to the digital fingerprint to the target public key value.
  • the above process is the data interaction process between the client 100 and the blockchain platform 200.
  • an embodiment of this application provides a blockchain-based code copyright registration system.
  • the storage pressure of the blockchain and the calculation of gas costs are reduced.
  • the data fingerprint of the feature set is also obtained through calculation as an identification of copyright, which facilitates confirmation of rights.
  • double signature verification is set up to ensure the accuracy of rights changes and prevent irreversible losses caused by the irreversibility of the blockchain network 10.
  • Figure 5 is a flow chart of a blockchain-based code copyright registration method provided by an embodiment of the present application.
  • the client 100 sends a registration data packet to the blockchain platform 200;
  • the registration data package includes a feature set, and the feature set is generated by the client 100 .
  • the blockchain platform 200 performs originality verification on the feature set
  • the feature set is received and the registration service related to the feature set is performed; when the verification of the feature set fails, the feature set is rejected.
  • the client 100 sends a change data packet to the blockchain platform 200;
  • the change data package is generated by the client 100; the change data package includes the registration certificate and the first digital signature.
  • the blockchain platform 200 performs signature verification on the change data package
  • Figure 6 is a schematic structural diagram of a blockchain-based code copyright registration platform provided by an embodiment of the present application.
  • the code copyright registration platform 1 may include: a first acquisition module 11, an originality verification module 12, a registration module 13, a second acquisition module 14, a signature verification module 15, and a change module 16:
  • the first acquisition module 11 is used to acquire the registration data packet sent by the client; wherein the registration data packet includes a feature set, and the feature set is generated by the client.
  • the originality verification module 12 is used to verify the originality of the feature set.
  • the registration module 13 is configured to receive the feature set and perform registration services related to the feature set when the feature set is successfully verified; and to reject the feature set when the feature set fails to be verified.
  • the second acquisition module 14 is used to acquire the change data packet sent by the client; the change data packet is generated by the client; the change data packet includes the registration voucher and the first digital signature.
  • the signature verification module 15 is used to perform signature verification on the change data package.
  • the change module 16 is configured to perform the change service related to the registration certificate when the verification of the change data package is successful; and to reject the change data package when the verification of the change data package fails.
  • FIG. 7 is a schematic structural diagram of a computer device provided by an embodiment of the present application.
  • the computer device 1000 may include a processor 1001 , a network interface 1004 and a memory 1005 .
  • the computer device 1000 may also include a user interface 1003 and at least one communication bus 1002 .
  • the communication bus 1002 is used to realize connection communication between these components.
  • the user interface 1003 may include a display screen (Display) and a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.
  • the network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).
  • the memory 1005 may be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory.
  • the memory 1005 may optionally be at least one storage platform located far away from the aforementioned processor 1001. As shown in Figure 7, memory 1005, which is a computer storage medium, may include an operating system, a network communication module, a user interface module, and a device control application program.
  • the network interface 1004 can provide network communication functions; the user interface 1003 is mainly used to provide an input interface for the user; and the processor 1001 can be used to call the device control application stored in the memory 1005 Program to implement the description of the blockchain-based code copyright registration method in any of the corresponding embodiments in Figure 5.
  • the computer device 1000 described in this application can also perform the description of the code copyright registration platform 1 in the remaining embodiments above, and the details will not be described again. In addition, the description of the beneficial effects of using the same method will not be described again.
  • this application also provides a computer-readable storage medium, and the computer-readable storage medium stores the computer program executed by the code copyright registration platform 1 mentioned above, and the computer program includes a program Instructions.
  • the processor executes the program instructions, it can execute the description of the blockchain-based code copyright registration method in any corresponding embodiment in Figure 5. Therefore, the details will not be described here.
  • the description of the beneficial effects of using the same method will not be described again.
  • the above program can be stored in a computer-readable storage medium, and the program can be stored in a computer-readable storage medium.
  • the process may include the processes of the above method embodiments.
  • the above-mentioned storage medium can be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

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Abstract

La présente demande divulgue un système, un procédé et une plateforme d'enregistrement de droit d'auteur de code basé sur une chaîne de blocs. Les effets de réduction de la pression de stockage d'une chaîne de blocs et des frais d'essence pour le calcul sont obtenus par stockage d'un ensemble de caractéristiques pour déterminer l'originalité dans la chaîne de blocs, et l'empreinte de données d'un ensemble de données est obtenue par calcul pour servir d'identifiant de droit d'auteur pour faciliter la confirmation du droit d'auteur. De plus, la précision du changement de droit d'auteur est assurée par réglage d'une vérification de double signature, et la perte irréversible provoquée par l'irréversibilité d'un réseau de chaîne de blocs est empêchée, de telle sorte qu'une gestion unifiée du droit d'auteur de code est réalisée.
PCT/CN2022/120150 2022-05-18 2022-09-21 Système, procédé et plateforme d'enregistrement de droit d'auteur de code basé sur une chaîne de blocs WO2023221350A1 (fr)

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