30results about How to "Solve the problem of mutual trust" patented technology

The invention discloses a federated learning method and device based on a block chain. The method comprises the steps: determining the block chain; enabling the coordinator node to create a federatedlearning task according to the model original data sent by each participant node; receiving training data obtained by local training of the participant nodes; sending the to-be-updated parameters to other participant nodes according to the training data, so as to enable the other participant nodes to update own model parameters according to the to-be-updated parameters; and after model training iscompleted, issuing reward resources according to training data provided by each participant node in the training process, and writing rewards into the block chain. Compared with a traditional mode, the mutual trust problem of all parties is effectively solved; all parties participating in federated learning negotiate together to generate a coordinator node, so that the transparency of the processis improved; federated learning whole-process data is recorded in a block chain, so that the traceability of data operation is ensured; all parties are encouraged to actively participate through rewarding resources, and the enthusiasm of participants is improved.

The invention aims to provide a block chain-based information processing method. The method comprises the steps of obtaining to-be-stored transaction information, wherein the transaction information comprises an abstract of the transaction information; generating an information identifier through the transaction information; packaging the abstract of the transaction information and the informationidentifier to generate block chain data; and disclosing the block chain data in a block chain to provide an information query service. By using the scheme disclosed by the method, the problems that the efficiency is low, the expansibility is poor, the data cannot be shared and the data is maliciously tampered and faked during acquisition and storage of the transaction information in an existing insurance information platform are solved.

The invention relates to the technical field of block chains, intelligent contracts, data crowdsourcing, machine learning and deep learning, in particular to a data annotation crowdsourcing platform system based on an intelligent contract and a crowdsourcing data annotation method. The crowdsourcing data annotation method comprises the steps of separating the data crowdsourcing annotation task from the annotation result quality evaluation task, evaluating annotation data through the trained model, randomly selecting a plurality of annotation data quality inspectors for crowdsourcing evaluation, and determining the data annotation quality by integrating a plurality of evaluation modes. The whole process of the crowdsourcing task is written into the block chain through the block chain infrastructure, the mutual trust of all parties participating in crowdsourcing is achieved, the integrity and the non-tamper performance of behaviors are guaranteed, the data labeling quality is improved toa certain degree, and then the model training efficiency and the model prediction accuracy are improved.

The invention relates to a multi-layer blockchain cross-domain authentication method in an Internet of Things application scene, and belongs to the technical field of Internet of Things and blockchains. According to the method, a blockchain identity registration protocol, a cross-domain identity authentication protocol and a node trust degree evaluation method based on delegation proving of rights and interests are used for carrying out distributed node management and security protection on the blockchain in an application scene of the Internet of Things; and when nodes of different blockchains need to carry out cross-chain identity authentication and data exchange, the across-chain trusted identity authentication is carried out by using a public block chain, so that the user privacy and the data security are ensured. The technical scheme includes the contents in the specification. Compared with an original centralized identity authentication mode, the identity authentication efficiency under the distributed application scene of the Internet of Things is improved, the management problem of certificates under a heterogeneous network is solved, and good safety and usability are achieved.

The invention relates to the field of reverse pricing of a buyer, and provides a method and a system for reverse pricing of a buyer based on a block chain. The method comprises the following steps: receiving a buyer element by a first client, generating a buyer contract according to the buyer element, and recording the buyer contract in a block chain, the buyer element comprising a first element and a buyer price, and the first element comprising a to-be-purchased commodity name; receiving a seller element by at least one second client, generating a seller contract according to the seller element, and recording the seller contract in the block chain, the seller element comprising a second element, a seller price, and the second element comprising a to-be-sold commodity name; and judging whether the seller contract read from the block chain conforms to the buyer contract or not by a server, if yes, generating an intelligent contract for concluding a transaction, and recording the intelligent contract in the block chain, and if not, notifying the first client and the second client of a message characterizing the transaction failure. The invention avoids the control right of a centralized system management platform to the transaction between the buyer and the seller.

The invention is applicable to the technical field of computers, and provides a supply chain financial service management platform, which comprises a service management end, an enterprise client in communication connection with the service management end based on a blockchain network, and a financing server; the service management terminal is used for receiving a financing request sent by an enterprise client, constructing a data risk control model based on an intelligent risk control technology according to the credit sample data of the financing server, judging whether financing informationand transaction information of the enterprise client meet a preset credit extension rule or not according to the data risk control model, receiving identification information sent by the enterprise client when a preset credit extension rule is met, and sending a financing instruction carrying the identification information to the financing server. Safe and credible free circulation of business flows, information flows, logistics flows and capital flows on the chain is facilitated, real and credible trade data is provided for financial institutions, and the problem of mutual trust among multi-party participants in existing supply chain finance is solved.

The invention discloses a medical insurance accurate identification method based on a block chain, and belongs to the technical field of intelligent contracts and block chains. According to the medical insurance accurate identification method based on the block chain, a block chain infrastructure is established in a P2P consensus network through a block chain service provider of a cloud data center, and execution of an intelligent contract and generation of a new block of the block chain are realized through cooperation; the participation nodes of the block chain jointly maintain an account book, and the execution condition of the key medical data intelligent contract in the commercial medical insurance life cycle process is recorded in the account book; health and medical conditions are provided by issuing tokens and enabling insurers to participate in, and medical and health data sharing among participation nodes is completed through a safety channel and anonymization processing. Themedical insurance accurate identification method based on the block chain can effectively solve the mutual trust problem between an insurance company and an insurance applicant, and has good popularization and application values.

The invention discloses a double CA (certificate authority) system which comprises a first certificate system, a second certificate system, interfaces and an account opening business machine. The first certificate system is used for authenticating a first certificate of devices or businesses, the second certificate system is used for authenticating a second certificate of the devices or businesses, the interfaces are used for issuing the first certificate and an authentication certificate to the devices or businesses authenticated by the first certificate system and the second certificate system, the account opening business machine is used for interconnecting the devices or businesses after the interfaces issue the first certificate and the second certificate to the devices or businesses, and the first certificate system and the second certificate system communicate with the account opening business machine through the interfaces. The invention further provides an implementation method of the double CA system. Mutual trust of the certificates is effectively realized, so that the problem of business overlapping is solved, the first certificate and the second certificate are authenticated by the first certificate system and the second certificate system, and interaction of the devices or businesses is facilitated by interconnection of the interfaces and the account opening business machine.

The invention discloses an electronic contract order pledge loan method and device based on a smart contract, and aims to solve the problems that an existing order pledge loan method is nonstandard inorder contract, high in bad loan rate and the like, and brings difficulty to actual implementation of order pledge loan. The blockchain network comprises a plurality of nodes, including a buyer node,a seller node and a financial institution node. The financial institution node receives a loan request sent by a seller node based on a pre-signed electronic contract order, and the electronic contract order comprises digital signatures made by the seller node and the buyer node based on digital certificates of the seller node and the buyer node respectively; based on a preset intelligent contract, the loan request is audited; and whether to issue a loan to the seller node or not is determined according to an audit result of the audit. By constructing a block chain network, identity authentication is carried out on each node, mutual trust among the nodes is guaranteed, and meanwhile, the security of communication data is guaranteed.

The invention discloses a block chain-based aviation material information sharing method, which comprises a block chain constructed based on a fabric system, and mainly comprises the following steps of realizing connection of bottom data at an aviation material information sharing participant by applying a block chain technology, and constructing a block chain network environment; linking the aviation material information sharing participation node into related aviation material information through a block chain at the node; realizing distributed file encrypted storage after aviation materialinformation sharing by applying a nationally-encrypted modified alliance block chain technology; applying the multi-channel characteristic of the block chain; providing technical support for classified management and authority control of aviation materials. According to the invention, the block chain technology is combined with aviation material information sharing, the characteristics of multi-party consensus and trust brought by block chain distributed account books, timestamps, cryptography and chain structures are combined with data non-tampering, real, objective and trust aviation material information sharing is taken as a support, and aviation material sharing ecological construction is provided.

The invention discloses a health insurance insuring method and device based on a block chain, and a medium. The method comprises the steps of acquiring insurance application information sent by an insurance applicant terminal, and according to identity information of an insured person, acquiring health data and/or diagnosis and treatment data of the insured person stored in a third-party main bodyon a health insurance block chain; depending on the type of insurance to be purchased, collecting candidate insurance product information of corresponding insurance types on an insurance network sales platform on the health insurance block chain; based on the health data and/or the diagnosis and treatment data of the insured person and the candidate insurance product information, processing by adopting an association analysis model to obtain recommended insurance product information, and sending the recommended insurance product information to an insurer end; and obtaining an insurance instruction sent by the insurance applicant side, and uploading insurance product information and insurance premium to the digital signature of the insurance applicant side to the health insurance block chain according to the health insurance intelligent contract. And information of an insured person and comparison of insurance products can be obtained truly and accurately.

The invention discloses a digital asset closed clearing method based on a smart contract. The method comprises the steps of 1, deploying a corresponding number of blockchain nodes in advance at each party according to an agreed weight coefficient; forming a relatively closed clearing environment by a system including a bank through a blockchain technology; pre-generating a smart contract on the blockchain, jointly appointing a set of format of blockchain data analysis by all parties, wherein the number of templates is set according to actual business requirements in the format, verifying the asset share held by an asset holder and the share held by the holder on the blockchain by a clearing initiator, generating and calling a blockchain calling instruction after the verification is correct, and executing the smart contract according to rules. According to the digital asset closed clearing method based on the smart contract, digital asset clearing work is completed by utilizing the credible advantage of blockchain natural data, the mutual trust problem in the digital asset clearing process is solved, and meanwhile, the complexity of all systems is reduced.

The invention provides a node interaction method, a certificate verification method, a device and related equipment. The node interaction method comprises the steps that a first CA node joins a mutual trust alliance, the mutual trust alliance comprises a plurality of CA nodes trust with the first CA node, and a block chain of the mutual trust alliance comprises a real-time CA state tree and root hash values corresponding to all leaf nodes of the CA state tree; each leaf node of the CA state tree comprises a node certificate and a node trust score value of one CA node, and each CA node stores a block chain. Therefore, the terminal can verify the certificate of the CA node in the mutual trust alliance in a Hash tree manner and then verify the legality of the terminal certificates of the other terminals through the certificate of the CA node aiming at certificates issued by other CA nodes in the same mutual trust alliance added to the CA node trusted by the terminal for other terminals. All certificates issued by CA nodes in a mutual trust alliance are trusted, and the mutual trust problem between any CA nodes is solved with low cost.