CN116436979B - Method and system for invoking external services by alliance block chain - Google Patents
Method and system for invoking external services by alliance block chain Download PDFInfo
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- 230000008569 process Effects 0.000 description 6
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Classifications
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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
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required 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
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/46—Secure multiparty computation, e.g. millionaire problem
- H04L2209/463—Electronic voting
Abstract
The application relates to the technical field of blockchains, and discloses a method and a system for invoking external services by a alliance blockchain so as to solve the problem of security of external service invocation. The method comprises the following steps: each node in the decentralised node set updates the trust value of the corresponding node participating in consensus in the trust value dynamic table stored in each node according to any dynamic consensus result; when the alliance blockchain generates a first request which can only use a unique node to non-repeatedly call external services, at least two nodes which are on-line are randomly selected from the decentralization node set by the current leader node to form a prescreening proper subset; and the leader node organizes all online nodes in the decentralised node set to vote on each node in the prescreened proper subset with the highest reliable weight according to the respectively stored reliability value dynamic table, and then determines an external service calling node for executing the first request according to the voting result.
Description
Technical Field
The application relates to the technical field of blockchains, in particular to a method and a system for invoking external services by a alliance blockchain.
Background
The blockchain technology is a decentralised distributed account book technology, and the security and the credibility of data are ensured through an encryption algorithm and a consensus mechanism. The key features of the system are decentralization, non-falsification, transparent traceability, intelligent contract and the like. Due to the characteristic of decentralization, the blockchain technology can avoid single-point faults, prevent data from being tampered, improve the safety of data transmission and has wide application value. Currently, the blockchain technology is applied to the fields of digital currency, finance, the Internet of things, electronic government affairs, supply chain management, copyright protection and the like, and provides a new thought and solution for the development of an informatization age.
The traditional multiparty alliance decision process is to propose by a conference mode, the alliance members adopt a voting decision mode, and when the voting passing rate reaches a certain proportion, the personnel or organization executes the content of the proposal related to the decision.
The multi-party alliance decision based on the blockchain is realized by solidifying the proposal and the voting mechanism on the blockchain in the form of intelligent contracts, fully utilizing the characteristics of tamper resistance, transparency traceability, identity verifiability and the like of the blockchain, being more intelligent, transparent and reliable compared with the traditional decision process, when the proposal content is executed, if the executed proposal content is on the blockchain, the proposal can be automatically triggered by the intelligent contracts, and if the executed proposal is required to be called by external services of the blockchain system, the proposal is triggered by special personnel or institutions through out-of-chain operation.
In the application of multi-party alliance decision based on block chain, under the condition that external service call of the block chain system is required to be carried out on the proposed content, any single-point system, special personnel or organization triggers due to the peer status of all parties of the alliance, so that the problem of trust exists, and the risk of decision execution can be brought.
Disclosure of Invention
The application aims to disclose a method and a system for invoking external services by a alliance blockchain, which are used for solving the security problem of external service invocation.
To achieve the above object, the present application discloses a method for invoking external services by a federated blockchain, comprising:
determining at least three nodes capable of calling external services in the alliance block chain to form a decentralised node set;
each node in the decentralised node set updates the corresponding node participating in the decentralization according to any dynamic consensus result in a respective saved trust value dynamic table, wherein the trust value dynamic table comprises the initial trust value, the consensus success rewarding trust value and the consensus failure punishment trust value of each node; and the single consensus rewarding and punishing algorithm in the trusted value dynamic table adopts the alliance blockchain to agree with a unified algorithm of intelligent contract and is positively correlated with the configured initial trusted value;
when the alliance blockchain generates a first request which can only call external services with unique nodes in a non-repeated mode, at least two nodes which are on-line are randomly selected from the decentralised node set by the current leader node to form a prescreened proper subset;
the leader node organizes all online nodes in the decentralised node set to vote on each node in the prescreened proper subset with the highest reliable weight according to the respectively stored reliability value dynamic table, and then determines an external service calling node for executing the first request according to voting results; the algorithm for calculating the reliable weight is a unified algorithm agreed by the alliance block chain with intelligent contracts, and specifically comprises the following steps: target node reliability weight = target node current reliability value/cumulative sum of all node current reliability values in the prescreened proper subset.
In order to achieve the above object, the present application also discloses a system for invoking external services by a federated blockchain, including:
a decentralised node set consisting of at least three nodes capable of invoking external services;
each node in the decentralised node set is used for updating the reliability value of the corresponding node participating in the consensus in a respective stored reliability value dynamic table according to any dynamic consensus result, wherein the reliability value dynamic table comprises the initial reliability value of each node, the consensus success rewarding reliability value and the consensus failure punishment reliability value; and the single consensus rewarding and punishing algorithm in the trusted value dynamic table adopts the alliance blockchain to agree with a unified algorithm of intelligent contract and is positively correlated with the configured initial trusted value;
a leader node for obtaining at least two nodes randomly selected online from the set of decentralised nodes to form a prescreened proper subset when the federated blockchain generates a first request that can only invoke external services non-repeatedly with a unique node; then organizing all online nodes in the decentralised node set, voting each node in the prescreened proper subset with the highest reliable weight according to the respectively stored reliability value dynamic table, and determining an external service calling node for executing the first request according to the voting result;
the algorithm for calculating the reliable weight is a unified algorithm agreed by the alliance block chain with intelligent contracts, and specifically comprises the following steps: target node reliability weight = target node current reliability value/cumulative sum of all node current reliability values in the prescreened proper subset.
The application has the following beneficial effects:
1. voting the nodes with highest reliable weights of the prescreened proper subset on the basis of the respectively stored reliability value dynamic tables through the decentralization node sets, and then determining the nodes for executing external service call according to the voting results. Thereby ensuring the safety of the screened results through multiple mechanisms.
2. In the maintenance process of the trusted value dynamic table, each related node is maintained through an intelligent contract unified algorithm, so that the problem that a single node dislikes the trusted value dynamic table is avoided being limited to the trusted value dynamic table stored by the single node; moreover, based on the prescreening proper subset being randomly composed of dynamic leader nodes in the blockchain, the impact of the bad results of individual or partial nodes on the final results is greatly reduced.
3. In the dynamic updating process of the trusted value dynamic table, a single consensus rewarding and penalizing algorithm is positively correlated with the configured initial trusted value, so that fairness is ensured, and the fairness and reliability of the finally screened external service nodes are further ensured.
4. The dynamic updating of the trusted value dynamic table is associated with the consensus result but decoupled from the request which can only call the external service call with a unique node non-repeatedly, so that the diversity and the inoperability of the data source for updating the trusted value are ensured, and the safety performance is further improved.
The application will be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a flow chart of a method for a federated blockchain to invoke an external service in accordance with an embodiment of the present application.
Detailed Description
Embodiments of the application are described in detail below with reference to the attached drawings, but the application can be implemented in a number of different ways, which are defined and covered by the claims.
Example 1
The embodiment discloses a method for invoking external services by a alliance blockchain, as shown in fig. 1, comprising the following steps:
step S1, determining at least three nodes capable of calling external services in the alliance block chain to form a decentralised node set.
And S2, updating the trusted value of the corresponding node participating in the consensus in the respective saved trusted value dynamic tables according to any dynamic consensus result by each node in the decentralised node set.
In the step, the trusted value dynamic table comprises initial trusted values, consensus success rewarding trusted values and consensus failure punishment trusted values of all nodes; and the single consensus rewards and penalties algorithm in the dynamic table of trusted values employs a unified algorithm agreed upon by the federation blockchain in a smart contract (the concept of which is common in the art, a computer protocol intended to propagate, verify or execute the contract in an informative manner) and positively correlated with the initial trusted value of the configuration. Wherein the reliability value is a measurement parameter for evaluating the reliability of the corresponding node.
Alternatively, the positive correlation may be implemented in a linear relationship according to the initial confidence value, or scaled according to the gradient range in which the initial confidence value is located. The initial confidence values may be magnitude based on the properties of each node, for example: A. b, C, respectively belonging to federation agencies 1, 2 and 3, if agency 1 is a large government unit and the credit is high, the initial trust value of the assignment is high, and if agency 3 is a newly registered small civil company, the initial trust value of the assignment is low. If the initial confidence value for institution 1 is 10 and the initial confidence value for institution 3 is 5, then if the penalty is applied in a linear relationship, then the penalty confidence value for a single consensus for institution 1 should be 1 when the penalty confidence value for a single consensus for institution 1 is 2. Alternatively, if gradients are used, the initial confidence values in the range of [ 9, 10) may be considered as the same gradient, the initial confidence values in the range of [ 5, 6) may be considered as another gradient, and the penalty confidence values between the different gradients are scaled equally by the gradient.
Step S3, when the alliance block chain generates a first request which can only call external service with a unique node in a non-repeated mode, at least two nodes which are on-line are randomly selected from the decentralised node set by the current leader node to form a prescreened proper subset.
In this step, the leader node may typically be updated dynamically, and may specifically be voted for each node in the decentralised node set or generated and switched in a rotation mechanism.
And S4, the leader node organizes all online nodes in the decentralised node set to vote on each node in the prescreened proper subset with the highest reliable weight according to the respectively stored reliability value dynamic table, and then an external service calling node for executing the first request is determined according to the voting result.
For example: each node throws 1 ticket to the node with the highest calculated reliable weight, and the node with the highest ticket obtaining number finally is determined to be the external service calling node for executing the first request.
In this step, the algorithm for calculating the reliable weight is a unified algorithm agreed by the alliance blockchain with an intelligent contract, specifically: target node reliability weight = target node current reliability value/cumulative sum of all node current reliability values in the prescreened proper subset.
Preferably, in this embodiment, the method further includes:
step S0, any node in the alliance blockchain applies permission to the current leader node before being incorporated into the decentralised node set, and after the leader node permits, the leader node broadcasts the initial trusted value information of the new incorporated node to each existing node in the decentralised node set, and instructs the new incorporated node to copy the trusted value dynamic table to the node with the highest reliable weight in each existing node as the initial trusted value dynamic table maintained by the new incorporated node.
Further, the method of the embodiment further comprises the following steps:
and S5, any node in the decentralizing node set sends a second request for applying for exiting to the current leading node.
And S6, broadcasting the exit message of the corresponding node to other nodes in the decentralised node set after the leading node is permitted, so that the other nodes can delete the relevant information of the exit node in the respective credible value dynamic tables.
Example 2
Corresponding to the above embodiment, this embodiment discloses a system for invoking an external service by a federated blockchain, including:
a set of decentralized nodes consisting of at least three nodes capable of invoking external services.
Each node in the decentralised node set is used for updating the reliability value of the corresponding node participating in the consensus in the respectively stored reliability value dynamic table according to any dynamic consensus result, wherein the reliability value dynamic table comprises the initial reliability value of each node, the consensus success rewarding reliability value and the consensus failure punishment reliability value; and the single consensus rewarding and punishing algorithm in the trusted value dynamic table adopts a unified algorithm agreed by the alliance blockchain in intelligent contracts and is positively correlated with the configured initial trusted value.
A leader node for obtaining at least two nodes randomly selected online from the set of de-centralized nodes to form a prescreened proper subset when the alliance blockchain generates a first request that can only non-repeatedly invoke external services with a unique node; and then organizing all online nodes in the decentralised node set, voting the nodes with highest reliable weights in the prescreened proper subset according to the respectively stored reliability value dynamic tables, and determining an external service calling node for executing the first request according to the voting result.
Similarly, the algorithm for calculating the reliable weight is a unified algorithm agreed by the alliance blockchain with an intelligent contract, and specifically comprises the following steps: target node reliability weight = target node current reliability value/cumulative sum of all node current reliability values in the prescreened proper subset.
Preferably, any node in the federation blockchain applies for permission to the current leader node before being incorporated into the set of decentralized nodes, and after permission of the leader node, the leader node broadcasts initial reliability value information of the new incorporated node to each existing node in the set of decentralized nodes, and instructs the new incorporated node to copy the reliability value dynamic table to the node with the highest reliable weight in each existing node as an initial reliability value dynamic table maintained by the new incorporated node.
Further, any node in the decentralised node set is further configured to send a second request for an exit to the current leader node; and the corresponding leader node is further to: after grant, the exit message of the corresponding node is broadcast to other nodes in the de-centralized node set for the other nodes to delete the relevant information of the exit node in the respective trusted value dynamic tables.
In summary, the method and system for invoking external services by the alliance blockchain disclosed in the embodiments of the present application have at least the following advantages:
1. voting the nodes with highest reliable weights of the prescreened proper subset on the basis of the respectively stored reliability value dynamic tables through the decentralization node sets, and then determining the nodes for executing external service call according to the voting results. Thereby ensuring the safety of the screened results through multiple mechanisms.
2. In the maintenance process of the trusted value dynamic table, each related node is maintained through an intelligent contract unified algorithm, so that the problem that a single node dislikes the trusted value dynamic table is avoided being limited to the trusted value dynamic table stored by the single node; moreover, based on the prescreening proper subset being randomly composed of dynamic leader nodes in the blockchain, the impact of the bad results of individual or partial nodes on the final results is greatly reduced.
3. In the dynamic updating process of the trusted value dynamic table, a single consensus rewarding and penalizing algorithm is positively correlated with the configured initial trusted value, so that fairness is ensured, and the fairness and reliability of the finally screened external service nodes are further ensured.
4. The dynamic updating of the trusted value dynamic table is associated with the consensus result but decoupled from the request which can only call the external service call with a unique node non-repeatedly, so that the diversity and the inoperability of the data source for updating the trusted value are ensured, and the safety performance is further improved.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (6)
1. A method for a federated blockchain to invoke an external service, comprising:
determining at least three nodes capable of calling external services in the alliance block chain to form a decentralised node set;
each node in the decentralised node set updates the corresponding node participating in the decentralization according to any dynamic consensus result in a respective saved trust value dynamic table, wherein the trust value dynamic table comprises the initial trust value, the consensus success rewarding trust value and the consensus failure punishment trust value of each node; and the single consensus rewarding and punishing algorithm in the trusted value dynamic table adopts the alliance blockchain to agree with a unified algorithm of intelligent contract and is positively correlated with the configured initial trusted value;
when the alliance blockchain generates a first request which can only call external services with unique nodes in a non-repeated mode, at least two nodes which are on-line are randomly selected from the decentralised node set by the current leader node to form a prescreened proper subset;
the leader node organizes all online nodes in the decentralised node set to vote on each node in the prescreened proper subset with the highest reliable weight according to the respectively stored reliability value dynamic table, and then determines an external service calling node for executing the first request according to voting results; the algorithm for calculating the reliable weight is a unified algorithm agreed by the alliance block chain with intelligent contracts, and specifically comprises the following steps: target node reliability weight = target node current reliability value/cumulative sum of all node current reliability values in the prescreened proper subset.
2. The method of claim 1, wherein any node in the federated blockchain applies for permission to a current leader node before being admitted to the set of decentralized nodes, and after permission by the leader node, the leader node broadcasts initial trust value information for the newly admitted node to each existing node in the set of decentralized nodes, and instructs the newly admitted node to replicate the trust value dynamic table to the highest-reliability weight node in each existing node as a self-maintained initial trust value dynamic table.
3. The method according to claim 1 or 2, further comprising:
any node in the decentralised node set sends a second request for applying for exiting to the current leader node;
after the leading node is permitted, the exit message of the corresponding node is broadcast to other nodes in the de-centralized node set, so that the other nodes delete the relevant information of the exit node in the respective trusted value dynamic tables.
4. A system for federating a blockchain to invoke an external service, comprising:
a decentralised node set consisting of at least three nodes capable of invoking external services;
each node in the decentralised node set is used for updating the reliability value of the corresponding node participating in the consensus in a respective stored reliability value dynamic table according to any dynamic consensus result, wherein the reliability value dynamic table comprises the initial reliability value of each node, the consensus success rewarding reliability value and the consensus failure punishment reliability value; and the single consensus rewarding and punishing algorithm in the trusted value dynamic table adopts the alliance blockchain to agree with a unified algorithm of intelligent contract and is positively correlated with the configured initial trusted value;
a leader node for obtaining at least two nodes randomly selected online from the set of decentralised nodes to form a prescreened proper subset when the federated blockchain generates a first request that can only invoke external services non-repeatedly with a unique node; then organizing all online nodes in the decentralised node set, voting each node in the prescreened proper subset with the highest reliable weight according to the respectively stored reliability value dynamic table, and determining an external service calling node for executing the first request according to the voting result;
the algorithm for calculating the reliable weight is a unified algorithm agreed by the alliance block chain with intelligent contracts, and specifically comprises the following steps: target node reliability weight = target node current reliability value/cumulative sum of all node current reliability values in the prescreened proper subset.
5. The system of claim 4, wherein any node in the federated blockchain applies for permission to a current leader node before being admitted to the set of decentralized nodes, and after permission by the leader node, the leader node broadcasts initial trust value information for the newly admitted node to each existing node in the set of decentralized nodes, and instructs the newly admitted node to replicate the trust value dynamic table to the highest-reliability weight node in each existing node as its own maintained initial trust value dynamic table.
6. The system of claim 4 or 5, wherein any node in the set of de-centralized nodes is further configured to send a second request to the current leader node to request for exit; and the corresponding leader node is further to: after grant, the exit message of the corresponding node is broadcast to other nodes in the de-centralized node set, so that the other nodes delete the relevant information of the exit node in the respective trusted value dynamic tables.
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