CN113542220A - Data security sharing method based on block chain - Google Patents
Data security sharing method based on block chain Download PDFInfo
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- CN113542220A CN113542220A CN202110641549.9A CN202110641549A CN113542220A CN 113542220 A CN113542220 A CN 113542220A CN 202110641549 A CN202110641549 A CN 202110641549A CN 113542220 A CN113542220 A CN 113542220A
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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
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0407—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the identity of one or more communicating identities is hidden
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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
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
- H04L63/0281—Proxies
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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
- H04L63/0823—Network architectures or network communication protocols for network security for authentication of entities using certificates
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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
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
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- 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
- H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees
Abstract
The invention discloses a data security sharing method based on a block chain, which comprises the steps of presetting modeling data management and control agents in all organizations needing combined modeling, wherein the modeling data management and control agents are used for safely sharing data among the organizations; building a block chain alliance chain network in a current combined modeling range among modeling data management and control agents, adding all organizations into the block chain alliance chain network, and generating org nodes of each organization; the modeling data management and control agent constructs a privacy set in a federation chain of an organization where the modeling data management and control agent is located, data is not shared in a whole federation chain ledger, and the sharing range of the privacy set is set; and the modeling data management and control agent uploads the data in the mechanism to the block chain through an intelligent contract to decide the data sharing range. The invention designs a financial alliance chain of an intelligent contract based on a block chain by combining the characteristics of an alliance modeling scene in the financial industry, solves the trust problem among organizations, and provides safe sharing and non-falsification of data.
Description
Technical Field
The invention relates to the technical field of block chains in the financial industry, in particular to a data security sharing method based on a block chain.
Background
In recent years, artificial intelligence and block chain technology are rapidly developed, and diversified floor application achievements are achieved in various industries such as manufacturing industry, agriculture, medical industry, smart home and the like. With the continuous progress and popularization of machine learning and deep learning technologies, the development of the financial industry is gradually transformed to intellectualization. In the financial industry, the demand for joint modeling using data between different financial institutions is increasing. For example, risk management is the core of the survival and development of financial institutions, and as the risk in the business operation of the financial institutions increases, the demand for the risk management capability is higher. However, the traditional risk management is the core of the survival and development of financial institutions, and with the increasing risks in the business operation of the financial institutions, the requirement on the risk management capability is higher and higher, so that the financial institutions need to use more professional scientific and intelligent means to identify and prevent risks, the application of a deep learning method to perform joint modeling among multiple institutions becomes an important development direction, and the prediction capability based on big data can provide powerful support for the fields of joint wind control and the like of the financial industry. However, as the protection requirement of data privacy is increasingly strict, how to perform secure sharing of data within a controllable range becomes an important issue to be fixed for joint modeling.
At present, in the cross-organization data interaction process of joint modeling in the financial industry, the following important disadvantages which restrict key work in the aspects of data security sharing modeling and the like generally exist: (1) financial institution data often needs high security, and cross-institution data collaboration needs privacy security of sensitive data to form a contradiction, so how to realize secure sharing and isolation of collaborative data among multiple financial institutions is an application challenge problem which is urgently needed to be solved at present; (2) the data sharing of the cross-financial institution has the risk of being tampered and utilized, and the reliability and source reliability of the data are important preconditions of the joint modeling of the multi-party data; (3) data sharing among financial institutions lacks an autonomous trust mechanism, and the ground application of financial intelligence is seriously influenced.
Aiming at the problem of data sharing among institutions in the financial field, the prior art effectively carries out the controllable and high-credibility data security collaborative sharing in the financial industry. A patent (CN 201810500537.2, a financial platform data sharing processing system) relates to a financial platform data sharing processing system, and aims to improve data sharing efficiency on engineering, and does not provide a reasonable solution for trust sharing of data, and the trust problem between organizations is not solved; in a patent (CN 201811550599.0, a financial institution user data sharing method and system based on the blockchain technology), although an attempt is made to solve the data sharing problem of the financial institution by using the blockchain technology, data sharing optimization is not performed for a joint modeling scene, hierarchical sharing verification of private data is not considered, and high applicability is not achieved; the patent (CN 202010456164.0, a data sharing method and a supply chain financial system) provides a data sharing method based on the blockchain technology, and does not attach importance to the protection of private data.
The block chain technology is a distributed book technology, and a decentralized trust mechanism is formed by utilizing core characteristics such as a consensus mechanism and the like. Through the intelligent contract, the autonomous execution and management of multiple participants in the block chain to a certain service requirement can be realized. Based on the characteristics and advantages of block chain decentralization, transparency, fairness and autonomy, the block chain technology can be used for safely and credibly sharing the data of the financial industry across the institutions, the safe cooperation and sharing among different institutions in the financial industry are promoted, the interaction efficiency and reliability among the institutions are improved, the reliability of the shared data is ensured, and the use compliance of the private information is restrained by using intelligent contracts. At present, no effective scheme is available for solving the problems of safety and reliability of data sharing in a cross-institution joint modeling scene in the financial industry by combining block chain technologies.
Aiming at the problem of a fine-grained sharing protocol of private data which is not effectively solved in the prior art, the invention provides a private set and an account book and a dynamic authority adjustment mechanism based on a block chain intelligent contract, the sharing of data is managed and shared in a grading manner, the highly sensitive private data is only shared and synchronized to the private set and the account book, and the data in the private set and the account book can still be verified by other mechanisms in a alliance chain while the fine-grained management and control are realized; meanwhile, according to business requirements, the access right granted to a specific mechanism is dynamically granted or cancelled through an intelligent contract, the high matching with an actual modeling scene can be achieved, and the access right of the account book can be flexibly controlled.
Disclosure of Invention
In view of the above technical problems in the related art, the present invention provides a block chain-based data security sharing method, which can overcome the above disadvantages of the prior art.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
a safe data sharing method based on a block chain comprises the following steps:
s1, presetting modeling data management and control agents in all organizations needing to perform combined modeling for safely sharing data among the organizations;
s2, building a blockchain alliance chain network in the current united modeling range among modeling data management and control agents, adding all organizations into the blockchain alliance chain network, and generating org nodes of each organization;
s3, modeling the privacy set in the alliance chain of the organization where the data management and control agent is located, wherein the data are not shared in the whole alliance chain book, and the sharing range of the privacy set is set;
and S4, uploading the data in the mechanism to a block chain through an intelligent contract by the modeling data management and control agent, and deciding the data sharing range.
Further, before all enterprises join the federation chain, strict admission rules and integer verification mechanisms are needed to ensure that data of the intra-chain enterprises are shared, and the intra-chain data is invisible to the extra-chain enterprises.
Furthermore, the federation chain ledger does not store real data, only stores a hash value, and the federation chain organizations outside the privacy set sharing range can only verify the data and cannot see the data.
Further, in step S4, a sharing scope is determined, and if the sharing is performed to the all-federation chain users, the data is written into the account book of the organization org node and synchronized within the federation chain.
Further, in step S4, a sharing range is determined, and if the sharing range has only the current enterprise or a small number of user enterprises in the federation chain, the data is written into the privacy set ledger of the enterprise org node, and synchronized among different enterprises having the authority of the privacy set, and the hash value of the data is shared and synchronized in the federation chain ledger.
Further, in step S4, when an organization that does not have the privacy set sharing authority wants to perform joint modeling using data in the privacy set, it is necessary to apply for the privacy set owner organization by using an intelligent contract.
The invention has the beneficial effects that: by combining the characteristics of joint modeling scenes in the financial industry, the invention provides a financial alliance chain of intelligent contracts based on block chains, solves the trust problem among organizations, provides safe sharing and non-falsification of data, and ensures that the data on the chain has high reliability and privacy security.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of generating a financial alliance chain and presetting a modeling data management and control agent in a data security sharing method based on a blockchain according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of private set generation and authorization scope setting based on a federation chain network of the block chain-based data security sharing method according to the embodiment of the present invention.
Fig. 3 is a schematic diagram of data multi-level sharing and dynamic authorization based on a blockchain intelligent contract according to the method for sharing data based on blockchain security according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention, and for the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are described in detail below by specific use modes.
The data security sharing method based on the block chain comprises the steps that firstly, modeling data management and control agents are preset in all institutions needing joint modeling in the financial industry to realize cross-institution data security controllable sharing; the modeling data management and control agents collaboratively construct a block chain alliance chain network in the current united modeling range, all organizations are added into an alliance chain based on strict admission rules and a certificate verification mechanism, org nodes of each organization are generated, and small-range authorization and sharing of data among the organizations based on private accounts in the alliance chain is achieved. It is ensured that the in-chain mechanism can share data and the out-of-chain mechanism is invisible to the in-chain data.
As shown in fig. 1, the preset process of the financial alliance chain generation and modeling data management and control agent is as follows:
the method is characterized in that a modeling data management and control agent is preset in each organization system with combined modeling requirements in the financial industry, and the agent is responsible for completing the construction and addition of a union chain and the reliable sharing of data by using an intelligent contract and providing basic guarantee for the reliability of combined modeling; the method comprises the steps of constructing a cross-organization alliance chain of the financial industry, adding enterprises needing to be subjected to a combined modeling range into the alliance chain based on a strict admission mechanism, and performing reliable evidence storage on data information on the chain by utilizing the characteristics of openness, transparency and non-falsification of a block chain, wherein a distributed account book is synchronous and updated only in the alliance chain range, which is different from a block chain public chain.
Based on private set generation and authorization range setting of a alliance chain network, a modeling data management and control agent constructs an alliance chain internal privacy set of the enterprise where the modeling data management and control agent is located, data in the set are not shared in a whole alliance chain account book, and a sharing range of the privacy set is set, so that transparent sharing and reliable evidence storage of finer-grained data in the alliance chain are achieved; the federation chain organizations outside the privacy set and the sharing range can verify the data, but the data are invisible, namely, the federation chain ledger does not store real data, and only stores the hash value of the data, so that the security of the privacy data is guaranteed.
As shown in fig. 2, the private set generation and authorization scope based on the federation chain network is set as: the mechanism in each alliance chain of the financial industry manages and controls the agency through the modeling data thereof, and constructs a private set and an account book belonging to the mechanism, wherein the account book is different from the alliance chain account book, is not synchronized and updated among all the mechanisms, and is only shared in a controllable range. Fine-grained presetting of access authority ranges of private sets and accounts of all alliance intra-chain mechanisms in the financial industry according to actual requirements of modeling services; for the whole financial alliance chain, the traceability of the private set and the ledger, namely the ability of verifying the data hash value, is only reserved, and when access authorization is not obtained, data stored in the private ledger cannot be seen to mechanisms in the supply chain alliance chain.
Based on the data multi-level sharing and dynamic authorization of the block chain intelligent contract, the modeling data management and control agent uploads the data in the mechanism to the block chain through the intelligent contract, and decides the data sharing range to prepare for joint modeling.
If the data are shared to the users in the whole alliance chain, the data are written into the account book of the org node of the organization and are synchronized within the alliance chain range; if the sharing range only has a small number of users in the self or the alliance chain, the data are written into the privacy set and the account book of the org node of the organization, the data are synchronized among different organizations with the set and the authority, and the hash value of the data is shared into the account book of the alliance chain and synchronized.
The organization which does not have the privacy set and the sharing authority needs to apply for the privacy set and the owner organization by using an intelligent contract to carry out joint modeling by using the data in the privacy set; the data on the chain has high reliability and privacy security.
As shown in fig. 3, the data multi-level sharing and dynamic sharing authorization based on the blockchain intelligent contract includes the following processes: the modeling data management and control agent of each organization in the financial industry uploads the data of each organization through an intelligent contract, and a data security grading center of the modeling data management and control agent judges whether the currently uploaded data is highly sensitive private data or not and determines that the data is uploaded to a federation chain account book or a private collection and an account book; and the modeling data management and control agent uploads the low-sensitivity data to the alliance chain ledger, the ledger is synchronized in all organizations within the range of the alliance chain, and all organizations within the alliance chain can inquire and verify the data.
The modeling data management and control agent uploads the high-sensitivity privacy data to a private set and an account book; and according to the private set and the authority configuration, the data sharing is updated to all other organizations with the account access node, and the hash value of the data is synchronously shared in the alliance chain for the other organizations to perform data verification.
Therefore, fine-grained safe sharing of cross-organization data in the financial industry can be achieved, and shared data of all levels have high reliability and traceability.
The modeling data management and control agent dynamically adjusts the authorization scope of the private set and the ledger of the affiliated organization, for example: and the organization E which does not have the private set and the account book authority needs to access the private set and the data of the organization A due to the joint modeling requirement, and applies the access authority of the private set and the account book to the organization A through an intelligent contract.
The modeling data management and control agent in the organization A confirms the compliance of the application and determines whether to authorize based on the organization E; and if the organization A decides to grant the private set and the ledger access right of the organization E, adding the organization E into the authorization list of the private set and the ledger through an intelligent contract.
After the modeling service is finished, the modeling data management and control agent can also remove authorization through an intelligent contract, namely, the accessible list settings in the private set and the account book are modified, the dynamic adjustment of the fine-grained private data sharing range is realized, the service requirements are met, and the data security with high flexibility is realized.
In conclusion, by means of the technical scheme, the financial alliance chain of the intelligent contract based on the block chain is invented by combining the joint modeling scene characteristics in the financial industry, the trust problem among organizations is solved, the safe sharing and the non-falsification of data are provided, and the data on the chain has high reliability and privacy security; based on a block chain network, technologies such as a consensus mechanism and an intelligent contract are utilized to realize safe and reliable collaborative sharing of cross-institution modeling data in the financial industry, and joint modeling is enabled.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A safe data sharing method based on a block chain is characterized by comprising the following steps:
s1, presetting modeling data management and control agents in all organizations needing to perform combined modeling for safely sharing data among the organizations;
s2, building a blockchain alliance chain network in the current united modeling range among modeling data management and control agents, adding all organizations into the blockchain alliance chain network, and generating org nodes of each organization;
s3, modeling the privacy set in the alliance chain of the organization where the data management and control agent is located, wherein the data are not shared in the whole alliance chain book, and the sharing range of the privacy set is set;
and S4, uploading the data in the mechanism to a block chain through an intelligent contract by the modeling data management and control agent, and deciding the data sharing range.
2. The block chain-based data security sharing method according to claim 1, wherein before all enterprises join the federation chain, strict admission rule and integer verification based mechanisms are required to ensure data sharing of the intra-chain enterprises, and the intra-chain enterprises are invisible to the intra-chain data.
3. The safe sharing method for data based on blockchains according to claim 1, wherein the federation chain ledger does not store real data, only stores hash values, and federation chain organizations outside the privacy set sharing range can only verify the data and do not see the data themselves.
4. The method according to claim 1, wherein in step S4, a sharing scope is determined, and if sharing is performed to a user in the full federation chain, data is written into the ledger of the organization org node and synchronized in the federation chain scope.
5. The method according to claim 1, wherein in step S4, a sharing range is determined, and if the sharing range has only a current enterprise or a small number of user enterprises in the federation chain, the data is written into the privacy set ledger of the enterprise org node, and the hash value of the data is shared and synchronized in the federation chain ledger among different enterprises having the authority of the privacy set.
6. The method according to claim 1, wherein in step S4, when an organization without the privacy set sharing authority wants to perform federated modeling using data in the privacy set, it needs to apply for the privacy set owner organization by using an intelligent contract.
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