CN114997867A - Data element multi-mode delivery system and method based on block chain and privacy calculation - Google Patents

Data element multi-mode delivery system and method based on block chain and privacy calculation Download PDF

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CN114997867A
CN114997867A CN202210654012.0A CN202210654012A CN114997867A CN 114997867 A CN114997867 A CN 114997867A CN 202210654012 A CN202210654012 A CN 202210654012A CN 114997867 A CN114997867 A CN 114997867A
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data
mode
delivery
calculation
product
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孙宗臣
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Shanghai Wanxiang Blockchain Inc
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Shanghai Wanxiang Blockchain Inc
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3821—Electronic credentials
    • 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
    • G06F21/602—Providing cryptographic facilities or services
    • 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
    • G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
    • G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
    • G06F21/6245—Protecting personal data, e.g. for financial or medical purposes
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3825—Use of electronic signatures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3827—Use of message hashing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3829—Payment protocols; Details thereof insuring higher security of transaction involving key management

Abstract

The invention provides a data element multi-mode delivery system and a method based on a block chain and private calculation, which comprises the following steps: a client: the system is responsible for uploading and downloading data products, encrypting and decrypting data, putting products on shelves, putting products off shelves and authorizing the use of the products; the data hosting node: the cryptograph escrow system is responsible for the cryptograph escrow of the data product and comprises an escrow agent re-encrypted cryptograph and a homomorphic encrypted cryptograph; the privacy computing node: the system is responsible for privacy calculation of data products, including ciphertext calculation and multi-party security calculation; an asset registration node: the system is responsible for data product asset registration, and generating an asset certificate and a certificate chain; data delivery service system: the scheduling of data delivery service is responsible; the block chain system: the system comprises a plurality of block chain nodes and executes intelligent contracts, wherein the intelligent contracts comprise data product certificate contracts, data delivery service storage contracts and ciphertext calculation contracts. The invention carries out chain verification on the production and flow transfer process of the data based on the intelligent contract of the block chain, thereby ensuring the authenticity and the validity of the data product.

Description

Data element multi-mode delivery system and method based on block chain and privacy calculation
Technical Field
The invention relates to the technical field of data element delivery, in particular to a data element multi-mode delivery system and method based on a block chain and privacy calculation.
Background
With the advance of market reformation of data elements, the data elements such as Beijing International big data exchange, Shanghai data exchange and the like are established in sequence. However, secure delivery of data becomes a difficult problem during data transactions and the like.
At present, a traditional offline delivery mode is mostly adopted in a data exchange, and a set of safe and controllable data delivery method and system is lacked after data matching is completed; due to the specific attributes of data, such as non-competitive, easy-to-copy and other characteristics, various data transaction disputes, such as ownership, data leakage and the like, are easily caused by adopting a common data transaction mode; in the process of data circulation, phenomena such as data tampering, data counterfeiting and the like are easy to occur, and the problems that the planned purchased data is inconsistent with the delivered data and the like are caused.
Patent document CN110807015A (application number: CN201910909089.6) discloses a big data asset value delivery management method and system, the delivery management method includes: step 1, data acquisition and asset transformation; step 2, establishing a theme story line; step 3, data preparation/data exploration; step 4, loading a business rule and an algorithm; step 5, visual scene delivery management; and 6, forming a scene templating and knowledge management system. However, this patent does not address the authenticity of the delivered data and the quality of the data; when data is delivered, the data safety and privacy are protected; after the data is delivered, the data is easy to copy and modify, and the like, so that the data ownership is not clear, and the like.
Disclosure of Invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a system and method for multimodal delivery of data elements based on blockchain and privacy calculations.
The data element multi-mode delivery system based on the block chain and the privacy calculation comprises the following components:
the client side comprises: the system is responsible for uploading and downloading data products, encrypting and decrypting data, putting products on shelves, putting products off shelves and authorizing the use of the products;
the data hosting node: the cryptograph escrow system is responsible for the cryptograph escrow of the data product and comprises an escrow agent re-encrypted cryptograph and a homomorphic encrypted cryptograph;
the privacy computing node: the system is responsible for privacy calculation of data products, including ciphertext calculation and multi-party security calculation;
an asset registration node: the system is responsible for data product asset registration, and generating an asset certificate and a certificate chain;
data delivery service system: the scheduling of data delivery service is responsible;
the block chain system: the system comprises a plurality of block chain nodes and an intelligent contract execution module, wherein the intelligent contract execution module executes an intelligent contract and comprises a data product certificate contract, a data delivery service storage contract and a ciphertext calculation contract;
the data asset credential contract comprises a credential creation, a credential owner transfer, and a credential viewing interface;
the data delivery service storage contract comprises a recording evidence storing and viewing interface for carrying out a service process;
the ciphertext computation contract comprises a ciphertext computation and a viewing interface.
Preferably, the product of the owner of the data product comprises a data set, a data API and a data value-added service, and corresponding ownership transaction types and data delivery types are set according to different product types, wherein the ownership transaction types comprise data ownership transaction and data use right transaction; the delivery type comprises a data domain output mode, an API calling mode and a privacy calculation transaction mode;
the data domain output mode is used for carrying out data ciphertext hosting in a proxy re-encryption mode;
the API call mode takes a signature generated by a data delivery service system as a universal API authentication mode;
the privacy calculation transaction mode adopts a mode comprising ciphertext calculation and safe multiparty calculation to carry out privacy calculation.
The multimode delivery method of the data elements based on the block chain and the privacy calculation, provided by the invention, comprises the following steps:
step 1: a data product owner registers the data product specification through a client, a data product registration node performs product verification, after the verification is passed, a data product is registered and signed, and then a data certificate production contract is called;
step 2: selecting a data product according to the requirement, paying, and obtaining a transaction payment voucher after the payment is finished;
and step 3: the data delivery service system initiates a data delivery task according to a data delivery mode and carries out chain linking on task information after receiving authorization approval;
and 4, step 4: performing data verification and evaluation;
and 5: transferring ownership of the data product;
and 6: and performing data product evaluation.
Preferably, the step 1 comprises:
the check item comprises whether the product information is complete and the data Hash is repeated; if the data out-of-domain mode is adopted, whether the data hosting address is valid needs to be checked; if the data API exists, carrying out API state inspection; if the delivery mode is based on the private calculation, the state of the private calculation node needs to be checked;
and after the certificate generation confirmation is completed at the block link point, the data product certificate is generated, and then the data product certificate is returned to the client through the data product registration node.
Preferably, the step 3 comprises:
for the data domain-exiting mode, a proxy re-encryption mode is adopted for data re-encryption;
for the data API delivery mode, signing in a service system in a mode of delivering a task number and a public key of a data consumer;
for the privacy calculation mode, if the privacy calculation mode is a safe multi-party calculation mode, the privacy calculation tasks are finished by respectively scheduling the privacy calculation nodes of the two parties through the service system, and the calculation result returns the Hash value of the calculation result; if the cipher text calculation mode is adopted, the cipher text calculation contract is called through the data delivery system, after the contract calculation is completed, the calculated cipher text is returned to the data delivery service system, and after the service system is decrypted, the cipher text is returned to the request client side.
Preferably, the task information uplink includes:
if the data domain mode is the data domain mode, chaining the delivery task number, the unique code of the data product, the first ciphertext Hash of the data and the public key of the data consumer;
if the data API mode exists, the delivery task number and the public key of the data consumer are linked up;
if the data is in the private calculation mode, for a safe multi-party calculation mode, chaining the delivery task number, the unique code of the data product and the Hash of the calculation result; and for the ciphertext calculation mode, chaining the delivery task number, the unique code of the data product and the Hash of the ciphertext calculation result.
Preferably, the manner in which the data consumer obtains the data results includes:
if the data domain mode is the data domain mode, downloading the applied ciphertext according to the download address of the obtained data ciphertext, and locally decrypting by using the private key of the local user;
if the data API mode is the data API mode, initiating API call according to the obtained signature of the service system to obtain a result of the data API, and then further chaining the delivery task number, the data consumer public key and the result Hash;
if the private computing mode is adopted, the secure multi-party computing mode is directly obtained from the private computing node; and returning the cryptograph calculation mode through the delivery service system.
Preferably, the step 4 comprises: a data consumer sends a check-on-link application to the block link points through the client, calls corresponding intelligent contracts and returns results according to the contracts to compare products;
the verification items include: digital asset voucher viewing, data Hash consistency comparison and data delivery information viewing.
Preferably, the step 5 comprises: and initiating a transfer ownership interface for calling a data registration contract through a signature carried by the original data owner and the public key of the transferee, and returning a new data product certificate after the contract is successfully called.
Preferably, the step 6 includes: and calling a data evaluation contract according to the experience condition of the data product, evaluating according to a preset evaluation model, and uplink-linking the evaluation result and sending the evaluation result to the client.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention provides a plurality of data delivery modes aiming at different scenes; for example, a privacy calculation delivery mode can avoid the original data from being out of the domain, and ensure the data safety of both parties; for the data domain mode, ciphertext data escrow is carried out based on the modes of proxy re-encryption and the like, and only a data consumer can decrypt the data; for the data API delivery mode, authentication is carried out through a uniform signature of the data delivery system, and the API can be normally accessed only after the authentication is passed;
2) the data passing through the data delivery system is subjected to chain verification storage on the production and flow transfer process of the data based on the block chain intelligent contract so as to ensure the authenticity and validity of the data product, the data flow transfer process is transparent, and the problem of transaction dispute, such as repudiation of transaction behaviors, is greatly reduced.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a block diagram of the system framework of the present invention;
fig. 2 is a main flow chart of data delivery.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example (b):
as shown in FIG. 1, the present invention provides a multi-modal delivery system for data elements, comprising:
a client: the system is responsible for uploading/downloading of data products, encrypting/decrypting data, uploading/unloading products, authorizing use and the like;
the data hosting node: the system is responsible for ciphertext escrow of data products, and can escrow for agent re-encrypted ciphertext, homomorphic encrypted ciphertext and the like;
the privacy calculation node: the system is in charge of the privacy calculation of data products and is divided into two modes of ciphertext calculation and multi-party safety calculation; in consideration of the data security problem, the node is mainly deployed by a data owner and can also be deployed by relying on a trusted third party;
an asset registration node: the system is responsible for data products, generating asset certificates, chaining the certificates and the like;
data delivery service system: the scheduling of data delivery service is responsible;
the block chain system: the whole block chain system is formed by a plurality of block chain common nodes; various intelligent contracts are executed on the system, including data product certificate contracts, data delivery service storage contracts, ciphertext calculation contracts and the like; the data asset certificate contract comprises method interfaces such as certificate creation, certificate owner transfer, certificate viewing and the like; the data delivery service evidence storing contract mainly comprises method interfaces for recording and storing evidence, checking and the like in the service process; the ciphertext calculation contract mainly comprises a ciphertext calculation interface and a viewing interface.
The invention relates to a plurality of cryptographic algorithms, such as EcDSA signature algorithm, AES encryption algorithm, HE homomorphic encryption algorithm and PRE proxy re-encryption algorithm; according to different scenes, different algorithms are adopted and correspond to different public and private keys, in order to facilitate key management, all keys are derived through a Master key, and a client only needs to store one Master key.
The data product owner's product mainly includes three types, namely, a data set, a data API and a data value-added service. And setting corresponding ownership transaction types and data delivery types according to different product types. The ownership transaction types are divided into two types: data ownership transactions and data usage rights transactions. The delivery mode is divided into three types, namely a data domain output mode, an API (application program interface) calling mode and a privacy calculation transaction mode;
and in the data domain output mode, data ciphertext hosting can be performed by adopting a proxy re-encryption mode and the like, and except for a data purchaser, other participants or hosting parties cannot obtain the content of the data product.
The API calls a schema that uses the signature generated by the data delivery service as a generic API authentication means.
The privacy calculation transaction mode refers to the privacy calculation performed by adopting ciphertext calculation, a secure multi-party calculation protocol and the like. If the data is in a ciphertext calculation mode, the data owner encrypts the data by using a public key of a delivery service system in a default mode when producing a data product; for special data products, public key encryption of consumers can be utilized; the encrypted data may be hosted on a private computing node. If a safe multi-party computing mode is adopted, the data can be ensured not to be out of a local domain, and the data cooperative computing is completed through cryptographic protocols such as safe multi-party computing and the like.
The invention provides a data element multi-mode delivery method, and the specific data delivery flow is as shown in figure 2:
1) and (3) data registration flow:
1-1: a data product owner registers the data product specification through a client, and if the data product is managed, a data hosting address is needed, as shown in table 1;
TABLE 1 data product description
Figure BDA0003688489900000051
Figure BDA0003688489900000061
1-2: the data product registration node carries out product verification; after the verification is passed, the data product is registered and signed, and then a data certificate production contract is called;
the check item comprises: basic tests such as whether product information is complete and data Hash is repeated are carried out; in addition, if the data domain exit mode is adopted, whether the data hosting address is valid needs to be checked; if the data API exists, the registration node performs API state check; if the delivery mode is based on the private computing, the state of the private computing node needs to be checked;
1-3: after the block link point completes the certificate generation confirmation, the data product certificate generation is completed, as shown in table 2;
TABLE 2 data product asset voucher
Voucher encoding Such as a transaction hash value
Transaction Hash 0x13ad**42e
Product unique code Such as a data hash
Data product owner Owner's public key
Date of cochain registration Time of uplink
Owner signature EcDSA signature
Prescription for issuing certificate Public key of certificate issuing party
Certificate issuing party signature Certificate issuing party signature
Visa date Time of issue of certificate
1-4: the data product registration node returns the data product voucher to the client.
2) And (3) data transaction flow:
2-1: the data consumer selects the data product A according to the requirement and pays;
2-2: returning the payment voucher after the payment is finished;
3) data delivery flow
3-1: the data consumer applies for a data delivery request according to the transaction payment voucher;
3-2: the data delivery service system creates a delivery task number, forwards the message and initiates an authorization request to a data owner;
3-3: after receiving the authorization agreement, the data delivery service system initiates a data delivery task according to the data delivery mode; the following cases are distinguished:
if the data is in the domain-out mode, if a proxy re-encryption mode is adopted for data re-encryption, the data re-encryption is completed; in order to improve the encryption efficiency, the original data is encrypted by using an encryption key, and the encryption key is encrypted by using a proxy re-encryption mode;
if the data API delivery mode is adopted, the service system carries out signature by 'delivering task number + data consumer public key';
if the private computing mode is adopted, if the secure multi-party computing mode is adopted, the service system respectively dispatches the private computing nodes of both parties to complete the private computing task, and the computing result returns the Hash value of the computing result; if the cipher text calculation mode is adopted, the data delivery system calls a cipher text calculation contract, and after the contract calculation is completed, the calculated cipher text is returned to the data delivery service system; after the service system decrypts the data, the data is returned to the request client;
3-4: after the service system completes the 3-3 steps, the task information is uplink divided into the following conditions:
firstly, if the data domain mode is adopted, the service system links the delivery task number, the unique code of the data product, the first ciphertext Hash of the data A and the public key of the data consumer;
if the data API mode is adopted, linking the delivery task number and the data consumer public key;
if the mode is a privacy calculation mode, if the mode is a safe multi-party calculation mode, chaining the delivery task number, the unique code of the data product and the Hash of the calculation result; if the data is in a ciphertext computing mode, the delivery task number, the unique code of the data product and the Hash of the ciphertext computing result are used.
3-5: the data consumer obtains the results of the data in the following cases:
if the data domain mode is adopted, downloading the applied ciphertext according to the download address of the data ciphertext obtained in the step 3-3, and locally decrypting by using the private key of the user;
if the data API mode is selected, initiating API call according to the signature of the service system obtained in the step 3-3 to obtain the result of the data API; then, the delivery task number, the data consumer public key and the result Hash can be further linked;
if the mode is the privacy calculation mode, the mode can be directly obtained from the privacy calculation node according to the step 3-3 if the mode is a safe multi-party calculation mode; if the cipher text calculation mode is adopted, returning is carried out through the delivery service system.
4) Data verification and evaluation process
4-1: a data consumer sends an on-chain check application to the block link points through a client, namely, a corresponding intelligent contract is called;
4-2: returning a result according to the contract, and comparing products;
the verification item mainly comprises: digital asset voucher viewing, data Hash consistency comparison, data delivery information viewing, and the like.
5) Data product ownership transfer flow
5-1: initiating a transfer ownership interface for calling a data registration contract by the data original owner carrying the 'signature + the public key of the transferee';
5-2: after the contract is successfully called, returning a new data product certificate;
6) data product assessment
6-1: according to the experience condition of the data product, the user calls a data evaluation contract;
6-2: evaluating the contract according to a preset evaluation model;
6-3: the client receives the evaluation result on the chain.
The invention completes the generation of the data product certificate through the asset register contract, ensures the authenticity and effectiveness of the data product and prevents the data from being tampered; wherein, the transfer of ownership of data products and the like is completed through intelligent contracts; the data ownership and the like are delivered; and checking through contract calling on the chain;
after the data product is delivered, evaluating the data product through a data evaluation contract; and contract evaluation ensures that a data evaluation model is public and transparent, so that evaluation tampering and other behaviors are prevented, and any user can check the evaluation condition of the data product under the default condition.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. A data element multimodal delivery system based on blockchain and privacy calculations, comprising:
a client: the system is responsible for uploading and downloading data products, encrypting and decrypting data, loading and unloading products and authorizing the products for use;
the data hosting node: the cryptograph escrow system is responsible for the cryptograph escrow of the data product and comprises an escrow agent re-encrypted cryptograph and a homomorphic encrypted cryptograph;
the privacy computing node: the system is responsible for privacy calculation of data products, including ciphertext calculation and multi-party security calculation;
an asset registration node: the system is responsible for registering the assets of the data products, generating asset certificates and a certificate chain;
data delivery service system: the scheduling of data delivery service is responsible;
the block chain system: the system comprises a plurality of block chain nodes and a plurality of intelligent contracts, wherein the intelligent contracts comprise a data product certificate contract, a data delivery service storage contract and a ciphertext calculation contract;
the data asset credential contract comprises a credential creation, a credential owner transfer, and a credential viewing interface;
the data delivery service storage contract comprises a recording evidence storing and viewing interface for carrying out a service process;
the ciphertext computation contract comprises a ciphertext computation and a viewing interface.
2. The blockchain and privacy computation based data element multimodal delivery system according to claim 1, wherein the data product owner's product includes a data set, a data API and a data value added service, and corresponding ownership transaction type and data delivery type are set according to different product types, wherein the ownership transaction type includes a data ownership transaction and a data usage right transaction; the delivery type comprises a data domain output mode, an API calling mode and a privacy calculation transaction mode;
the data domain output mode is used for carrying out data ciphertext escrow in a proxy re-encryption mode;
the API call mode takes the signature generated by the data delivery service system as a universal API authentication mode;
the privacy calculation transaction mode adopts a mode comprising ciphertext calculation and safe multiparty calculation to carry out privacy calculation.
3. A multimodal delivery method of data elements based on blockchain and privacy calculations, characterized in that, with the multimodal delivery system of data elements of claim 1 or 2, the following steps are performed:
step 1: a data product owner registers a data product specification through a client, a data product registration node performs product verification, after the verification is passed, a data product is registered and signed, and then a data certificate production contract is called;
step 2: selecting a data product according to the requirement, paying, and obtaining a transaction payment voucher after payment is completed;
and step 3: the data delivery service system establishes a delivery task number and transmits a message, initiates an authorization request to a data owner, initiates a data delivery task according to a data delivery mode after receiving an authorization approval, and carries out chaining on task information;
and 4, step 4: performing data verification and evaluation;
and 5: transferring ownership of the data product;
step 6: and performing data product evaluation.
4. The method for multimodal delivery of data elements based on blockchain and privacy calculations according to claim 3, wherein the step 1 comprises:
the check item comprises whether the product information is complete and the data Hash is repeated; if the data domain exit mode is adopted, whether the data hosting address is valid needs to be checked; if the data API exists, carrying out API state inspection; if the delivery mode is based on the private computing, the state of the private computing node needs to be checked;
and after the block link point completes the certificate generation confirmation, the data product certificate generation is completed, and then the data product certificate is returned to the client through the data product registration node.
5. The method for multimodal delivery of data elements based on blockchain and privacy calculations according to claim 3, wherein said step 3 comprises:
for the data domain mode, a proxy re-encryption mode is adopted for data re-encryption;
for the data API delivery mode, signing in a mode of delivering a task number and a public key of a data consumer in a service system;
for the privacy calculation mode, if the privacy calculation mode is a safe multi-party calculation mode, the privacy calculation tasks are finished by respectively scheduling the privacy calculation nodes of the two parties through the service system, and the calculation result returns the Hash value of the calculation result; if the cipher text calculation mode is adopted, the cipher text calculation contract is called through the data delivery system, after the contract calculation is completed, the calculated cipher text is returned to the data delivery service system, and after the service system is decrypted, the cipher text is returned to the request client side.
6. The method of claim 3, wherein the chaining of task information comprises:
if the data domain mode is the data domain mode, chaining the delivery task number, the unique code of the data product, the first ciphertext Hash of the data and the public key of the data consumer;
if the data API mode exists, the delivery task number and the public key of the data consumer are linked up;
if the data is in the private calculation mode, for a safe multi-party calculation mode, chaining the delivery task number, the unique code of the data product and the Hash of the calculation result; and for a ciphertext computing mode, chaining the delivery task number, the unique code of the data product and the Hash of the ciphertext computing result.
7. The blockchain and privacy computing based data element multimodal delivery method according to claim 5, wherein the manner in which a data consumer obtains data results includes:
if the data domain mode is the data domain mode, downloading the applied ciphertext according to the download address of the obtained data ciphertext, and locally decrypting by using the private key of the local user;
if the data API mode is the data API mode, initiating API call according to the obtained signature of the service system to obtain a result of the data API, and then further chaining the delivery task number, the data consumer public key and the result Hash;
if the private computing mode is adopted, the secure multi-party computing mode is directly obtained from the private computing node; and returning the cryptograph calculation mode through the delivery service system.
8. The blockchain and privacy computing based data element multimodal delivery method according to claim 3, wherein said step 4 includes: a data consumer sends an on-chain check application to the block link points through a client, calls a corresponding intelligent contract, returns a result according to the contract and compares products;
the verification items include: digital asset voucher viewing, data Hash consistency comparison and data delivery information viewing.
9. The method for multimodal delivery of data elements based on blockchain and privacy calculations according to claim 3, wherein the step 5 comprises: and initiating a transfer ownership interface for calling a data registration contract through a signature carried by the original data owner and the public key of the transferee, and returning a new data product certificate after the contract is successfully called.
10. The method for multimodal delivery of data elements based on blockchain and privacy calculations according to claim 3, wherein the step 6 comprises: and calling a data evaluation contract according to the experience condition of the data product, evaluating according to a preset evaluation model, and chaining and sending an evaluation result to the client.
CN202210654012.0A 2022-06-10 2022-06-10 Data element multi-mode delivery system and method based on block chain and privacy calculation Pending CN114997867A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116760528A (en) * 2023-08-21 2023-09-15 成都乐超人科技有限公司 Multiparty asset delivery method and device based on multi-key homomorphic sharing
CN116842578A (en) * 2023-08-31 2023-10-03 武汉大数据产业发展有限公司 Privacy computing platform, method, electronic equipment and medium in data element transaction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116760528A (en) * 2023-08-21 2023-09-15 成都乐超人科技有限公司 Multiparty asset delivery method and device based on multi-key homomorphic sharing
CN116760528B (en) * 2023-08-21 2023-10-27 成都乐超人科技有限公司 Multiparty asset delivery method and device based on multi-key homomorphic sharing
CN116842578A (en) * 2023-08-31 2023-10-03 武汉大数据产业发展有限公司 Privacy computing platform, method, electronic equipment and medium in data element transaction

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