CN108848063B - Block chain-based data processing method, system and computer-readable storage medium - Google Patents

Block chain-based data processing method, system and computer-readable storage medium Download PDF

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CN108848063B
CN108848063B CN201810508918.5A CN201810508918A CN108848063B CN 108848063 B CN108848063 B CN 108848063B CN 201810508918 A CN201810508918 A CN 201810508918A CN 108848063 B CN108848063 B CN 108848063B
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data
node
key
generator
owner
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CN108848063A (en
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张艳菊
卢亦斌
邢超
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Suzhou Lang run innovation intellectual property operation Co.,Ltd.
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Suzhou Lang Run Innovation Intellectual Property Operation Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0807—Network architectures or network communication protocols for network security for authentication of entities using tickets, e.g. Kerberos
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/321—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving a third party or a trusted authority
    • H04L9/3213—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving a third party or a trusted authority using tickets or tokens, e.g. Kerberos

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  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Storage Device Security (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)

Abstract

The application discloses a data processing method, a system and a computer readable storage medium based on a block chain. The data management method comprises the steps that a data owner node respectively grants permission for uploading and inquiring data to a data generator node and a data demander node through identity tokens, the data generator node obtains an encryption key for encrypting data through the identity tokens to encrypt the data and then uploads the encrypted data to a data management node, and the data demander node obtains a corresponding decryption key and the encrypted data through the identity tokens to obtain the data. This improves the security and confidentiality of data and enables the data owner node to participate in managing its own data, ensuring the rights and interests of the data owner and improving the processing efficiency of the data.

Description

Block chain-based data processing method, system and computer-readable storage medium
Technical Field
The present application relates to the field of computer technologies, in particular, to a block chain technology, and more particularly, to a data processing method and system based on a block chain, and a computer-readable storage medium.
Background
The block chain technology is a novel application technology set of computer technologies such as distributed data storage, point-to-point transmission, a consensus mechanism, an encryption algorithm and the like. From the data perspective, the block chain combines the data blocks in a sequential connection mode into a chain data structure according to the time sequence, and the data structure is guaranteed to be not falsifiable and not to be forged in a cryptographic mode. From a technical point of view, the blockchain technology integrates a plurality of different technologies, and by constructing a blockchain network, each node in the network is allowed to obtain a complete database copy, and updates of the blockchain-based database are maintained based on a consensus mechanism and competition calculation. Therefore, the decentralized and distrust of data storage and management are realized through an end-to-end network formed by communication of a plurality of nodes.
In a blockchain network, all operating rules and data information are public for all nodes, so each record is visible to all nodes. Meanwhile, because the nodes are distrusted, the nodes do not need to disclose identities, and each participated node is anonymous. Meanwhile, the blockchain technology has excellent security, and the modification of the database by a single node or even multiple nodes cannot affect the databases of other nodes, unless more than 51% of the nodes in the whole network can be controlled to modify simultaneously, so that the modification of the data recorded in the blockchain is possible and is almost impossible.
Currently, hospitals, physical examination facilities, recruitment websites, shopping platforms, and other platforms that have customer data typically use the customer's data without authorization from the customer, which infringes the customer's rights and interests.
Disclosure of Invention
In view of this, the present application provides a data processing method, system and computer readable storage medium based on a block chain, so as to improve the security and confidentiality of data, enable nodes of a data owner to participate in managing own data, guarantee rights and interests of the data owner, and improve the processing efficiency of the data.
In a first aspect, a data processing method based on a block chain is provided, including:
the method comprises the steps that a data generator node and a data owner node execute transaction based on a block chain to obtain at least two identity tokens of the data owner node, wherein the identity tokens are used for representing identity information corresponding to the data owner node;
the data generator node and the key generation node execute a first intelligent contract which is deployed in advance so as to obtain an encryption key according to the identity token;
the data generator node and the data management node execute block chain-based transaction to verify the authority of the data generator node according to the identity token;
after the authority is verified, the data generator node uploads the encrypted data to the data management node, wherein the encrypted data is obtained by encrypting the data generated by the data generator node by using the encryption key;
and the key generation node associates and stores the identifier of the data generated by the data generator node with a decryption key corresponding to the encryption key.
Further, the executing, by the data generator node and the key generation node, the pre-deployed first smart contract to obtain the encryption key according to the identity token includes:
the data generator node sends the identity token to the key generator node through a block chain transaction;
the key generation node verifies the authority of the data generator node according to the identity token;
after the authority of the data generator node is verified, the key generator node randomly generates a pair of key pairs, associates the identification of the data generated by the data generator node with a decryption key in the key pairs and stores the identification;
and the key generation node sends the encryption key in the key pair to the data generator node through one blockchain transaction.
Further, the method further comprises:
the data demand side node and the data owner node execute transaction based on a block chain to acquire at least two identity tokens of the data owner node;
the data demander node and the key generation node execute a second pre-deployed intelligent contract to acquire the decryption key according to the identity token;
the data demand side node, the data owner node, the data generator node and the data management node execute a third intelligent contract which is deployed in advance so that the data demand side node obtains the encrypted data according to the identity token and the data owner node, the data generator node and the data management node obtain digital assets in a preset proportion;
and the data demand side node decrypts the encrypted data through the decryption key to acquire the data generated by the data generation side node.
Further, the executing, by the data consumer node and the key generation node, a pre-deployed second smart contract to obtain the decryption key according to the identity token includes:
the data demand side node sends the identity token to the key generation node through one-time block chain transaction;
the key generation node verifies the authority of the data demand party node according to the identity token;
and after the authority of the data demand side node is verified, the key generation node sends the decryption key to the data demand side node through one block chain transaction.
Further, the executing, by the data consumer node, the data owner node, the data generator node, and the data management node, a third smart contract that is deployed in advance so that the data consumer node obtains the encrypted data according to the identity token and the data owner node, the data generator node, and the data management node obtain digital assets in a predetermined ratio includes:
the data demand side node sends the identity token to the data management node through one blockchain transaction;
the data management node verifies the authority of the data demander according to the identity token;
after the authority of the data demander node is verified, the data management node sends the encrypted data to the data demander node, and the data owner node, the data generator node and the data management node obtain digital assets in a preset proportion.
Further, before the data producer node performs a blockchain based transaction with the data owner node to obtain at least two identity tokens for the data owner node, the method further comprises:
and the data owner node and the data generator node execute transaction based on a block chain so that the data generated by the data generator node is bound with the data owner node to complete data authority determination, and meanwhile, the data generated by the data generator node is input into a chain for storage.
Further, the identity token is invalidated after verification by the key generation node and/or the data management node.
In a second aspect, a block chain based data processing system is provided, comprising:
a data owner node;
a data generator node configured to perform a blockchain-based transaction with the data owner node to obtain at least two identity tokens of the data owner node, the identity tokens being used to characterize identity information corresponding to the data owner node;
a key generator node configured to execute a pre-deployed first smart contract with the data generator node to send an encryption key to the data generator node in accordance with the identity token; and
a data management node configured to perform a blockchain based transaction with the data generator node to verify the authority of the data generator node in accordance with the identity token;
wherein the data generator node is further configured to upload, to the data management node, encrypted data obtained by encrypting the data generated by the data generator node with the encryption key after the permission verification passes;
the key generation node is also configured to store the identifier of the data generated by the data generator node and the decryption key corresponding to the encryption key after associating the identifier with the decryption key.
Further, the system further comprises:
a data consumer node configured to perform a blockchain based transaction with the data owner node to obtain at least two identity tokens for the data owner node;
wherein the data consumer node is further configured to execute a pre-deployed second smart contract with the key generation node to obtain the decryption key from the identity token; the data consumer node is further configured to execute a third pre-deployed intelligent contract with the data owner node, the data generator node, and the data management node to cause the data consumer node to obtain the encrypted data according to the identity token, and to cause the data owner node, the data generator node, and the data management node to obtain a predetermined proportion of digital assets.
In a third aspect, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the method as described above.
In the technical scheme of the embodiment of the application, a data owner node respectively grants permission to a data generator node and a data demander node to upload and query data through an identity token, the data generator node acquires encryption of an encryption key of the data through the identity token so as to upload the encrypted data to a data management node, and the data demander node acquires a corresponding decryption key and the encrypted data through the identity token so as to acquire the data. This improves the security and confidentiality of data and enables the data owner node to participate in managing its own data, ensuring the rights and interests of the data owner and improving the processing efficiency of the data.
Drawings
The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments thereof with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a data processing system according to an embodiment of the present application;
FIG. 2 is a flowchart of a data uploading method according to an embodiment of the present application;
FIG. 3 is a flow chart of a data query method of an embodiment of the present application;
fig. 4 is a schematic diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The present application is described below based on examples, but the present application is not limited to only these examples. In the following detailed description of the present application, certain specific details are set forth in detail. It will be apparent to one skilled in the art that the present application may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present application.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
The data in this embodiment may be medical data generated from a hospital, a physical examination institution, a health management institution, or the like, or may be data generated from an internet platform such as a shopping platform or a recruitment website, that is, data generated according to any behavior of an owner is included.
FIG. 1 is a schematic diagram of a data processing system according to an embodiment of the present application. As shown in fig. 1, the data management system of the present embodiment includes a data owner node 11, a data generator node 12, a key generation node 13, a data management node 14, and a data demander node 15. The data owner node 11, the data generator node 12, the key generation node 13, the data management node 14, and the data demander node 15 may be connected to a blockchain network 100, and connected to communicate through the blockchain 100. The block chain network may be a local area network, a metropolitan area network, and/or a wide area network, among others. The data owner node 11, the data generator node 12, the key generation node 13, the data management node 14, and the data demander node 15 are all general-purpose data processing devices, such as a smart phone, a tablet computer, a portable computer, a desktop computer, or the like, in which predetermined computer programs are installed.
The blockchain uses a certificate management component to issue PKI (Public Key Infrastructure) based certificates to blockchain members. The PKI includes CA and RA (registration authority), where RA authenticates a user and verifies the validity of data, and submits evidence such as credentials to the CA to support the request of the user. Wherein the blockchain issues a root certificate (rootCert), a registration certificate (eCert), and transaction certificates (tcrs) to the blockchain link points through the CA. It should be understood that each of the above types of certificates includes a pair of signing keys (i.e., an encryption key and a decryption key) and a pair of encryption keys.
The data owner node 11 is configured to perform a blockchain based transaction with the data producer node 12 such that the data owner node 11 binds with the corresponding data to complete the validation of the data while crediting the chain with the hash value of the data.
Specifically, after the identity person corresponding to the data owner node 11 generates behavior data (for example, medical records generated when a patient looks at a hospital, data generated when a user uses a network platform, and the like) on a platform corresponding to the data generator node 12, the data owner node 11 initiates a block chain-based transaction to the data generator node 12 to generate a first transaction order. The first transaction ticket includes the addresses and signatures of the data owner node 11 and the data producer node 12 and the identification of the corresponding data. After the first transaction order is validated by the other nodes in the blockchain, the data owner node 11 binds with the data. Preferably, the identification of the data is a hash value of the data.
The data producer node 12 is configured to perform a blockchain based transaction with the data owner node 11 to send at least two identity tokens to the data producer node 12, the identity tokens being used to characterize the corresponding identity information of the data owner node 11. Specifically, the data generator node 12 initiates a transaction based on the blockchain to the data owner node 11, and after the transaction is verified by other nodes in the blockchain, the data generator node 12 obtains at least two identity tokens of the data owner node.
Preferably, the identity token may be a hash value of the identity information of the data owner node 11. In one embodiment, when a user registers a blockchain node, identity information (at least one of biometric features, identification card number and the like) is uploaded to a blockchain, a hash value of the identity information is input into a chain for storing, and the blockchain generates a predetermined number of identity tokens through a predetermined hash algorithm according to the identity information and sends the predetermined number of identity tokens to the node through one blockchain transaction. In another implementation, in the data processing system of this embodiment, the data processing system further includes a public security agency node, configured to obtain identity information (at least one item of information such as biometrics) of an identity person corresponding to each node, generate a predetermined number of identity tokens by using a predetermined hash algorithm, and send the identity tokens to the corresponding nodes through one block chain transaction. And the public security organization node links the acquired hash value of the identity information and stores the certificate.
The following describes the technical solution of the present embodiment by taking an identity token as a hash value of identity information of the data owner node 11 as an example. It should be understood that the identity token may also be other data for characterizing the identity information corresponding to the data owner node, and the data for characterizing the identity information corresponding to the data owner node is stored in the blockchain in advance so as to verify the authority of the data generator node and the data demander node.
The data producer node 12 is further configured to execute a pre-deployed first smart contract with the key producer node 13 to obtain the cryptographic key. Specifically, the data generator node 12 sends an identification of the data to be uploaded and an identity token to the key generation node 13 through one blockchain transaction. The key generation node 13 verifies the authority of the data generator node according to the identity token, that is, the key generation node 13 verifies the authority of the data generator node 12 by verifying whether the identity token is consistent with the hash value of the identity information of the data owner node 11 in the blockchain. After the authority of the data generator node 12 is verified, the key generation node 13 randomly generates a pair of key pairs, associates the identifier of the data to be uploaded with a decryption key in the key pair, and stores the associated identifier. The key generation node 13 sends the encryption key of the key pair to the data generator node 12 through a blockchain transaction. Preferably, the identification of the data is a hash value of the data. The data producer node 12 encrypts the data to be uploaded using the encryption key of the key pair.
The data management node 14 is configured to perform a blockchain based transaction with the data producer node 12 to verify the authority of the data producer node 12, and after the authority of the data producer node 12 is verified, the data producer node 12 uploads the encrypted data to the data management node 14. Specifically, the data generator node 12 sends an identity token and information such as an identifier of the data to be uploaded to the data management node 14 through a blockchain transaction. The data management node 14 verifies the authority of the data generator node 12 according to the identity token, that is, the data management node 14 verifies the authority of the data generator node 12 by verifying whether the identity token is consistent with the hash value of the identity information of the data owner node 11 in the blockchain. The data management node 14 returns the verification result to the data producer node 12. And if the data generator node 12 receives the message passing the verification, uploading the data to be uploaded encrypted by the encryption key to the data management node 14. The data management node 14 is configured to store the encrypted data, and is further configured to display an identifier of the data and/or an identifier of a data product processed from the data.
It should be understood that the platform corresponding to the data generator node 12 may generate data of the data owner node 11 multiple times, for example, a customer performs physical examination at a certain physical examination institution for a certain year, after the physical examination data is confirmed, the data generator node corresponding to the physical examination institution encrypts the physical examination data with the encryption key obtained from the key generator node and uploads the encrypted physical examination data to the data management node. After the client performs physical examination again in the physical examination institution in the next year, after the physical examination data is confirmed, the data generator node corresponding to the physical examination institution encrypts all physical examination data generated by the client in the physical examination institution by using the obtained encryption key and uploads the encrypted all physical examination data to the data management node. That is to say, all data generated by a client on a platform corresponding to the same data generator node is collected and then encrypted and uploaded to the data management node, however, after data is confirmed each time, the data generator node needs to apply for a new encryption key to the key generation node, the key generation node associates the corresponding new decryption key with the identifier of the total data and then stores the new decryption key, and the previous key pair is invalidated.
Further, the data consumer node 15 is configured to perform a blockchain based transaction with the data owner node 11 to obtain at least two identity tokens of the data owner node 11.
The data consumer node 15 is further configured to execute a pre-deployed second smart contract with the key generation node 13 to obtain a decryption key for decryption. Specifically, the data consumer node 15 sends information such as an identifier of the data to be queried (the identifier is shown in the data management node 14) and an identity token to the key generation node 13. The key generation node 13 verifies the query authority of the data demander node 15 according to the identity token, that is, the data demander node 15 verifies the query authority of the data demander node 15 by verifying whether the identity token is consistent with the hash value of the identity information of the data owner node 11 in the blockchain. After the query authority of the data demander node 15 is verified, the key generation node 13 sends the decryption key corresponding to the data to be queried to the data demander node 15 through one blockchain transaction.
The data demand side node 15, the data owner node 11, the data generator node 12 and the data manager node 14 execute a third intelligent contract which is deployed in advance so that the data demand side node 15 obtains encrypted data to be inquired, and meanwhile, the data owner node 11, the data generator node 12 and the data manager node 14 obtain digital assets in a preset proportion. Specifically, the data consumer node 15 sends an identification of the data to be queried and an identity token to the data management node 14 via a blockchain transaction. The data management node 14 verifies the query authority of the data demander node 15 according to the identity token, that is, the data demander node 15 verifies the query authority of the data demander node 15 by verifying whether the identity token is consistent with the hash value of the identity information of the data owner node 11 in the blockchain. After the query authority of the data demander node 15 is verified, the data management node 14 sends the encrypted data to be queried to the data demander node, and the data owner node 11, the data generator node 12 and the data manager node 14 acquire digital assets in a predetermined proportion.
It should be appreciated that the data processing system in this embodiment pre-deploys an algorithm that calculates the value of the data and data products from which the data and data products are priced. The third pre-deployed intelligent contract contains the revenue proportion obtaining algorithm of the data owner node 11, the data generator node 12 and the data manager node 14. The digital assets are general-purpose assets circulating in the data processing system of the embodiment, and can enjoy discounts of platforms (such as medical institutions, health management institutions, fitness institutions or e-commerce platforms) or exchange corresponding services or commodities according to the holding amount of the digital assets. It will be readily appreciated that in executing the third intelligent contract, the digital assets obtained by the data owner node 11, the data producer node 12 and the data manager node 14 are paid for by the data demander node 15. The platform corresponding to the data demander node 15 is a special organization (e.g., judicial department), and the digital assets to be paid can be set to 0.
The data consumer node 15 decrypts the encrypted data to be queried using the decryption key obtained from the key generation node 13 to obtain the data.
It should be understood that the identity token is invalidated after being verified by the key generator node 13 and/or the data manager node 14, and that two identity tokens are sent each time the data owner node 11 grants the data generator node 12 and the data demander node 15 rights, so that the data generator node 12 and the data demander node 15 have 0 identity tokens for the data owner 11 after the data generator node 12 uploads data and after the data demander node 15 obtains encrypted data and decryption keys. This ensures that the data producer node 12 and the data consumer node 15 cannot misuse the identity token to avoid compromising the rights of the owner to which the data owner node 11 corresponds.
In summary, in this embodiment, the data owner node grants the data generator node and the data demander node the right to upload and query the data respectively through the identity token, the data generator node obtains the encryption key for encrypting the data through the identity token to upload the encrypted data to the data management node, and the data demander node obtains the corresponding decryption key and the encrypted data through the identity token to obtain the data. The method improves the safety and the confidentiality of the data, enables the nodes of the data owner to participate in managing the data, guarantees the rights and interests of the data owner, and improves the processing efficiency of the data.
Fig. 2 is a flowchart of a data uploading method according to an embodiment of the present application. As shown in fig. 2, at step S1, the data producer node initiates a blockchain based transaction to the data owner node to obtain at least two identity tokens for the data owner node. Specifically, the data generator node initiates a transaction based on the block chain to the data owner node, and after the transaction is verified by other nodes in the block chain, the data generator node obtains at least two identity tokens of the data owner node. Preferably, the identity token is a hash value of identity information of the data owner node. It is to be readily understood that, before performing step S1, the owning node performs a blockchain-based transaction with the data producer node such that the data owning node binds to the corresponding data to complete the validation of the data, while entering the hash value of the data into the chain deposit.
At step S2, the data generator node initiates a blockchain based transaction to the key generating node to send an identity token and an identification of the data to be uploaded to the key generating node.
At step S3, the key generating node verifies the authority of the data generating party node based on the identity token. Specifically, whether the identity token is consistent with the hash value of the corresponding identity information in the blockchain is verified. And the hash value of the corresponding identity information in the block chain is the hash value of the identity information of the data owner node corresponding to the data to be uploaded. If the data is consistent with the data, the authority of the data generator node is verified.
In step S4, after the authority of the data generator node is verified, the key generator node randomly generates a pair of key pairs, associates the hash value of the data to be uploaded with the decryption key in the key pair, and stores the hash value.
At step S5, the key generation node initiates a block chain based transaction to the data generator node to send the encryption key of the key pair to the data generator node.
It will be readily appreciated that steps S2-S5 are specific steps of executing a pre-deployed first smart contract for a data producer node and a key producer node.
At step S6, the data generator node initiates a blockchain based transaction to the data management node to send an identity token and an identification of the data to be stored to the data management node.
At step S7, the data management node verifies the authority of the data generator node based on the identity token. Specifically, whether the identity token is consistent with the hash value of the corresponding identity information in the blockchain is verified. And the hash value of the corresponding identity information in the block chain is the hash value of the identity information of the data owner node corresponding to the data to be uploaded. If the data is consistent with the data, the authority of the data generator node is verified.
At step S8, the data management node returns the verification result to the data generator node.
In step S9, after the authority of the data generator node is verified, the data generator node uploads the data encrypted using the encryption key to the data management node. The data management node is used for storing the encrypted data and displaying the identification of the data and/or the identification of a data product processed by the data.
It should be understood that, after all data generated by a client on a platform corresponding to the same data generator node is summarized and encrypted and uploaded to the data management node, however, after each data is confirmed, the data generator node needs to apply for a new encryption key to the key generation node, and the key generation node associates and stores a corresponding new decryption key with an identifier of total data, and makes the last key pair invalid.
In summary, in the embodiment of the present application, the data is encrypted and stored by randomly generating the key pair through the identity token and the key generation node, so that the security and confidentiality of the data are improved, and the rights and interests of data owners are guaranteed.
Fig. 3 is a flowchart of a data query method according to an embodiment of the present application. As shown in fig. 3, in step S10, the data demander node initiates a block chain based transaction to the data owner node according to the identity of the data to be queried to obtain at least two identity tokens of the data owner.
At step S20, the data consumer node initiates a blockchain based transaction to the key generating node to send an identity token and an identification of the data to be queried to the key generating node.
In step S30, the key generation node verifies the query authority of the data consumer node according to the identity token. Specifically, whether the identity token is consistent with the hash value of the corresponding identity information in the blockchain is verified. And the hash value of the corresponding identity information in the block chain is the hash value of the identity information of the data owner node corresponding to the data to be uploaded. And if the data are completely consistent, the query authority of the data generator node is verified.
In step S40, after the query authority of the data consumer node is verified, the key generation node initiates a block chain-based transaction to the data consumer node to send a decryption key for decrypting the data to be queried to the data consumer.
It should be understood that steps S20-S40 are specific steps of executing a pre-deployed second smart contract for a data demander node with a key generation node.
At step S50, the data consumer node initiates a blockchain based transaction to the data management node to send an identity token and an identification of the data to be queried to the data management node.
In step S60, the data management node verifies the query authority of the data demander node according to the identity token. Specifically, whether the identity token is consistent with the hash value of the corresponding identity information in the blockchain is verified. And the hash value of the corresponding identity information in the block chain is the hash value of the identity information of the data owner node corresponding to the data to be uploaded. And if the data are consistent with each other, the query authority of the data generator node is verified.
In step S70, after the query authority of the data generator node is verified, the data management node sends the encrypted data to be queried to the data consumer node, and at this time, the data owner node, the data generator node and the data management node obtain digital assets in a predetermined ratio.
It should be appreciated that steps S50-S70 are specific steps of the data demander node executing a pre-deployed third intelligent contract with the data management node.
Preferably, the data demander node obtains at the data manager node an identification of the data that needs to be queried (possibly different data for the same data owner). The data requiring node sends an identification of these data to the data owner node when initiating a blockchain based transaction to the data owner node to request an identity token. Therefore, the data owner node can authorize the data demander node to query various data (i.e. data generated by platforms corresponding to different data generator nodes) at the same time, and after the key generation node and the data management node verify that the data requested by the data demander is authorized to be queried by the data owner, all corresponding secret keys and all encrypted data are sent to the data demander.
In step S80, the data demander node decrypts the encrypted data to be queried according to the decryption key acquired from the key management node to obtain the required data.
It should be understood that the above steps do not represent a specific order of execution, for example, steps S50-S70 may be executed before steps S20-S40, or after steps S20-S40. That is, the data demand side node may first obtain the encrypted data to be queried and then obtain the decryption key for decryption through the identity token, or may first obtain the decryption key for decryption and then obtain the encrypted data to be queried through the identity token.
In summary, in the embodiment of the present application, the data consumer node obtains the decryption key in the key pair randomly generated by the key generation node through the identity token, and obtains the required data according to the identity token and the decryption key, which improves the security of the data and guarantees the rights and interests of the data owners.
For example, when the identity corresponding to the node of the data owner is a patient, the node corresponding to each hospital is authorized to upload the medical data of the patient to the data management node after at least one hospital sees a disease. When doctor-patient disputes occur, the judicial authority joint and the data owner node corresponding to the patient execute one block chain transaction to generate a second transaction list, wherein the second transaction list comprises the identification of all data required by the judicial authority node and at least two identity tokens. After the second transaction order is verified, the judicial authority node obtains the authority to query the required data. The judicial authority node requests the corresponding decryption key and the encrypted data from the key generation node and the data management node respectively. And the key generation node and the data management node verify the identity information and the second transaction list in the identity token, and if the identity information and the second transaction list are verified to pass, the data management node and the key generation node respectively send all encrypted data and corresponding decryption keys to the judicial institution node. Similarly, the related insurance agency node also obtains the related encrypted data and the corresponding decryption key by the method. Then, the judicial institution nodes solve the doctor-patient disputes by inquiring all the medical data, and the insurance institution nodes determine the amount of claims by inquiring all the medical data. Since the hash value of the medical data is uploaded into the blockchain at the beginning of its generation. Thus, no changes to medical data can be made whether it is a hospital or a patient, which makes incident handling more equitable and fair, while safeguarding the rights and interests of the parties against compromise.
It should be understood that the digital asset to be paid when a special node such as a judicial institution node inquires data may be set to 0.
Fig. 4 is a schematic diagram of an electronic device according to an embodiment of the present application. The electronic device shown in fig. 4 is a general-purpose data processing apparatus comprising a general-purpose computer hardware structure including at least a processor 41 and a memory 42. The processor 41 and the memory 42 are connected by a bus 43. The memory 42 is adapted to store instructions or programs executable by the processor 41. Processor 41 may be a stand-alone microprocessor or may be a collection of one or more microprocessors. Thus, processor 41 implements the processing of data and the control of other devices by executing instructions stored by memory 42 to perform the method flows of embodiments of the present invention as described above. The bus 43 connects the above components together, and also connects the above components to a display controller 44 and a display device and an input/output (I/O) device 45. Input/output (I/O) devices 45 may be a mouse, keyboard, modem, network interface, touch input device, motion sensing input device, printer, and other devices known in the art. Typically, the input/output devices 45 are connected to the system through input/output (I/O) controllers 46.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, apparatus (device) or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may employ a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations of methods, apparatus (devices) and computer program products according to embodiments of the application. It will be understood that each flow in the flow diagrams can be implemented by computer program instructions.
These computer program instructions may be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows.
These computer program instructions may also be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (8)

1. A data processing method based on a block chain is characterized by comprising the following steps:
the method comprises the steps that a data generator node and a data owner node execute transaction based on a block chain to obtain at least two identity tokens of the data owner node, wherein the identity tokens are used for representing identity information corresponding to the data owner node;
the data generator node and the key generation node execute a first pre-deployed intelligent contract to obtain an encryption key according to the identity token, and the method comprises the following steps: the data generator node sends the identity token to the key generator node through a block chain transaction; the key generation node verifies the authority of the data generator node according to the identity token; after the authority of the data generator node is verified, the key generator node randomly generates a pair of key pairs, associates the identification of the data generated by the data generator node with a decryption key in the key pairs and stores the identification; the key generation node sends the encryption key in the key pair to the data generator node through one blockchain transaction;
the data generator node and the data management node execute block chain-based transaction to verify the authority of the data generator node according to the identity token;
after the authority is verified, the data generator node uploads the encrypted data to the data management node, wherein the encrypted data is obtained by encrypting the data generated by the data generator node by using the encryption key;
and the key generation node associates and stores the identifier of the data generated by the data generator node with a decryption key corresponding to the encryption key.
2. The data processing method of claim 1, wherein the method further comprises:
the data demand side node and the data owner node execute transaction based on a block chain to acquire at least two identity tokens of the data owner node;
the data demander node and the key generation node execute a second pre-deployed intelligent contract to acquire the decryption key according to the identity token, and the method comprises the following steps: the data demand side node sends the identity token to the key generation node through one-time block chain transaction; the key generation node verifies the authority of the data demand party node according to the identity token; after the authority of the data demander node is verified, the key generation node sends the decryption key to the data demander node through one block chain transaction;
the data demand side node, the data owner node, the data generator node and the data management node execute a third intelligent contract which is deployed in advance so that the data demand side node obtains the encrypted data according to the identity token and the data owner node, the data generator node and the data management node obtain digital assets in a preset proportion;
and the data demand side node decrypts the encrypted data through the decryption key to acquire the data generated by the data generation side node.
3. The data processing method of claim 2, wherein executing a third pre-deployed intelligent contract by the data consumer node, the data owner node, the data generator node, and the data management node to enable the data consumer node to obtain the encrypted data according to the identity token and enable the data owner node, the data generator node, and the data management node to obtain a predetermined proportion of digital assets comprises:
the data demand side node sends the identity token to the data management node through one blockchain transaction;
the data management node verifies the authority of the data demander according to the identity token;
after the authority of the data demander node is verified, the data management node sends the encrypted data to the data demander node, and the data owner node, the data generator node and the data management node obtain digital assets in a preset proportion.
4. The data processing method of claim 1, wherein before the data producer node performs a blockchain based transaction with the data owner node to obtain at least two identity tokens for the data owner node, the method further comprises:
and the data owner node and the data generator node execute transaction based on a block chain so that the data generated by the data generator node is bound with the data owner node to complete data authority determination, and meanwhile, the data generated by the data generator node is input into a chain for storage.
5. The data processing method according to claim 1, wherein the identity token is invalidated after verification by the key generation node and/or the data management node.
6. A blockchain-based data processing system, comprising:
a data owner node;
a data generator node configured to perform a blockchain-based transaction with the data owner node to obtain at least two identity tokens of the data owner node, the identity tokens being used to characterize identity information corresponding to the data owner node;
a key generating node configured to execute a pre-deployed first smart contract with the data producer node to send an encryption key to the data producer node in accordance with the identity token, comprising: the data generator node sends the identity token to the key generator node through a block chain transaction; the key generation node verifies the authority of the data generator node according to the identity token; after the authority of the data generator node is verified, the key generator node randomly generates a pair of key pairs, associates the identification of the data generated by the data generator node with a decryption key in the key pairs and stores the identification; the key generation node sends the encryption key in the key pair to the data generator node through one blockchain transaction; and
a data management node configured to perform a blockchain based transaction with the data generator node to verify the authority of the data generator node in accordance with the identity token;
wherein the data generator node is further configured to upload, to the data management node, encrypted data obtained by encrypting the data generated by the data generator node with the encryption key after the permission verification passes; the key generation node is also configured to store the identifier of the data generated by the data generator node and the decryption key corresponding to the encryption key after associating the identifier with the decryption key.
7. The data processing system of claim 6, wherein the system further comprises:
a data consumer node configured to perform a blockchain based transaction with the data owner node to obtain at least two identity tokens for the data owner node;
the data demand side node is further configured to execute a second pre-deployed intelligent contract with the key generation node to acquire the decryption key according to the identity token, the data demand side node sends an identifier of data to be queried and identity token information to the key generation node, the data demand side node verifies the query authority of the data demand side node by verifying whether the identity token is consistent with the hash value of the identity information of all the data side nodes in the block chain, and after the query authority of the data demand side node is verified, the key generation node sends the decryption key corresponding to the data to be queried to the data demand side node through one block chain transaction;
the data demand side node is further configured to execute a third intelligent contract which is deployed in advance with the data owner node, the data generator node and the data management node, so that the data demand side node acquires the encrypted data according to the identity token, and so that the data owner node, the data generator node and the data management node acquire digital assets in a preset proportion, the data demand side node sends an identifier of data to be queried and an identity token to the data management node through one blockchain transaction, the data demand side node verifies the query authority of the data demand side node by verifying whether the identity token is consistent with a hash value of identity information of the data owner node in a blockchain, and after the query authority of the data demand side node is verified, the data management node sends the encrypted data to be queried to the data demand side node, the data owner node, the data generator node and the data manager node obtain digital assets in a predetermined proportion.
8. A computer-readable storage medium on which computer program instructions are stored, which computer program instructions, when executed by a processor, implement the method of any one of claims 1-5.
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Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051037

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231211

Application publication date: 20181120

Assignee: Nantong Tuoerpu Surveying and Mapping Information Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051034

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231211

Application publication date: 20181120

Assignee: Nantong TongZhou Jinfeng Textile Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051033

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231211

Application publication date: 20181120

Assignee: Nantong Chenghui Pharmacy Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051032

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231211

EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20181120

Assignee: Nantong Yuma Electromechanical Manufacturing Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051794

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231215

Application publication date: 20181120

Assignee: Nantong Lingde Pharmaceutical Equipment Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051787

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231215

Application publication date: 20181120

Assignee: Yitong Intelligent Control Technology (Nantong) Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051745

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231215

Application publication date: 20181120

Assignee: Nantong Dongdong Steel Structure Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051732

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231215

Application publication date: 20181120

Assignee: Nantong Huaxin Price Evaluation Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051652

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231214

Application publication date: 20181120

Assignee: Nantong Jianwei Metal Technology Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051651

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231214

Application publication date: 20181120

Assignee: JIANGSU YATAI FITNESS CO.,LTD.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051650

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231214

Application publication date: 20181120

Assignee: JIANGSU KANGFEITE POWER TECHNOLOGY Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051649

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231214

Application publication date: 20181120

Assignee: Nantong Qiju Textile Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051534

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231213

Application publication date: 20181120

Assignee: Nantong Ansheng Textile Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051533

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231213

Application publication date: 20181120

Assignee: Nantong Steel Machinery Manufacturing Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051532

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231213

Application publication date: 20181120

Assignee: NANTONG FEIHAI ELECTRONIC TECHNOLOGY CO.,LTD.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980051531

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231213

EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20181120

Assignee: Nantong Huase Space Textile Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052536

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231221

Application publication date: 20181120

Assignee: Jiangsu guanan electromechanical Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052527

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231221

Application publication date: 20181120

Assignee: Nantong Anergu New Material Technology Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052518

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231221

Application publication date: 20181120

Assignee: Nantong Yijialai Woolen Knitting Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052512

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231221

Application publication date: 20181120

Assignee: Nantong Laiou Electronic Technology Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052377

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231219

Application publication date: 20181120

Assignee: Nantong Ouchen Electronic Technology Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052355

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231219

Application publication date: 20181120

Assignee: Nantong Laishang Electronic Technology Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052351

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231219

Application publication date: 20181120

Assignee: NANTONG KYLIN MACHINERY LTD.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052325

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231218

Application publication date: 20181120

Assignee: Haoshi new material technology Nantong Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052125

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231218

Application publication date: 20181120

Assignee: NANTONG YUQI METAL PRODUCTS Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052111

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231218

Application publication date: 20181120

Assignee: Nantong Runyuan structural parts Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052101

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231218

Application publication date: 20181120

Assignee: NANTONG LILIAN MACHINE TOOL MANUFACTURING CO.,LTD.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052076

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231218

EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20181120

Assignee: Nantong Zhili Machinery Technology Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052928

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231222

Application publication date: 20181120

Assignee: Nantong Nongchaoer Food Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052927

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231222

Application publication date: 20181120

Assignee: Nantong Bairun Catering Management Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052926

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231222

Application publication date: 20181120

Assignee: Nantong Jinbao Machinery Manufacturing Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052778

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231222

Application publication date: 20181120

Assignee: Nantong Tuoda Machinery Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052749

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231222

Application publication date: 20181120

Assignee: Weizhi New Material Technology (Nantong) Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052740

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231222

Application publication date: 20181120

Assignee: Honglei mechanical equipment (Nantong) Co.,Ltd.

Assignor: Suzhou Lang run innovation intellectual property operation Co.,Ltd.

Contract record no.: X2023980052729

Denomination of invention: Blockchain based data processing methods, systems, and computer-readable storage media

Granted publication date: 20210507

License type: Common License

Record date: 20231222

EE01 Entry into force of recordation of patent licensing contract