85 results about "Blockchain" patented technology

The invention discloses a management method of vote and a CA certificate of a block chain. Addresses of the first batch of public keys with the voting right and the voting number of each public key are recorded in the first block of the block chain, and on the block chain, when the signature vote of voters is beyond a certain proportion of votes, a proposal can come into effect and is written in the block chain. The signature vote which is more than 50% of the total votes can be regulated to increase, freeze, recover, change or abolish the voting right of a certain public key address, each voting result is written in the block chain, and the time period of valid vote is regulated. The signature vote which is more than 50% can authorize the authority to each level of user CA of the block chain via private keys capable of regulating certain corresponding public key addresses, which can be called the superior root CA center of the block chain.

The invention relates to an anonymous electronic voting method based on blockchain. A blind signature electronic voting scheme is introduced into blockchain as a vote information database, each vote is written into a transaction data block and transmitted to a counting center, in addition, a monitoring mechanism is introduced into the method, then rights of operators can be limited, and the situation that fraud voting is resulted or the voting process is interfered and voting results are affected since rights of operators are too centralized, is avoided. By adopting the method, the anonymity of a conventional electronic voting system is effectively solved, and the method has the characteristics that votes cannot be forged, the voting process and the voting results are open and transparentand can be verified, and the like.

The invention discloses a cloud data security sharing method based on a block chain. The method comprises the steps that 1, a trusted certificate authorization center provides a unique global identityID and a digital certificate according to identity information submitted by a user or an attribute authorization center; the attribute authorization center assigns attribute public and private key pairs for each attribute and distributes attributes for legal users; 2, encrypting and uploading the user data; 3, downloading data by the user; and 4, data decryption: the attribute key set of the usermeets the access strategy of the data, and a decryption key can be obtained through an attribute-based decryption algorithm, so that the data to be accessed can be decrypted. The method has the advantages that the data sharing safety and the data sharing efficiency are improved in an untrusted environment, and the compliance of entity behaviors is supervised.

The invention discloses a payment method based on a block chain. On the condition that a first trusted node performs payment and successful payment is performed, self account information is changed, and furthermore the updated account information is transmitted to each second trusted node so that each second trusted node performs synchronization of the self account information for obtaining updated account information of the first trusted node. The first trusted node and each second trusted node belong to trusted nodes which receive a password certificate. All trusted nodes are connected in a block chain topological structure. The invention further discloses a payment system based on the block chain.

The invention discloses a private lending risk pre-control method based on block chain. The method comprises the steps that a borrowing and lending parties select an authority verification institute nodes in a block alliance chain through a private lending service platform to carry out risk pre-control; wherein the block alliance chain is composed of a plurality of authority verification institutenodes based on a predetermined alliance protocol. The block alliance chain in the method comprises three information chains: a contract information chain, a credit record information chain and a contract fulfillment information chain. The lending and borrowing parties can consciously conform to the contract in the lending process by storing the borrowing contract information, the user bad creditinformation and the contract fulfillment information. According to the method, a lending service platform is constructed on the basis of the block alliance chain, so that the risk of multiple lendingand borrowing can be prevented, and the risk of illegal gathering can be reduced, so that the interests of both lending and borrowing parties can be guaranteed.

The invention discloses a decentralized storage system based on a double-layer network. The system comprises a plurality of light nodes, a plurality of full nodes and a plurality of main nodes, wherein the light nodes, the full nodes and the main nodes form a block chain main network, and the main nodes form a main node processing network; the light nodes are used for storing user specific data, and the full nodes and the main nodes are used for storing a complete block chain based on a consensus mechanism in the block chain main network; and the main nodes are further used for storing the data without the consensus as the offline data in the main node processing network. According to the technical scheme provided by the invention, resource isolation is carried out by utilizing the main nodes, the system has high expandability, data processing constraints are reduced, and the data throughput of the system is effectively improved.

The invention provides a block chain borrowing method and system. The method is applied to multiple borrower terminals in the block chain borrowing system. The method comprises the steps that a loan request is submitted to a block chain system; when a necessary information supplement notification sent by lender terminals or a risk management terminal is received, encrypted necessary information corresponding to the necessary information supplement notification is written into the block chain system, wherein the necessary information supplement notification is generated according to the loan request; multiple credit and loan electronic contract files sent by multiple lender terminals according to the loan request and a signature risk management result respectively are received, wherein thesignature risk management result is generated by the lender terminals or the risk management terminal according to the encrypted necessary information and written into the block chain system after being encrypted; the credit and loan electronic contract files which meet a preset condition are selected for signature, and target credit and loan electronic contract files are obtained. The problem oflow safety of a transaction process and data in the prior art is solved, and the method has the advantage of improving the safety.

A system configured to track, trace and monitor product. In some aspects, the system is configured to track product and capture product related information and includes a network interface configured to receive product related information over a network from a plurality of tracking devices located at a plurality of facilities. The system also includes a database configured to store the product related information from the plurality of tracking devices located at the plurality of facilities. The system also includes a processor configured to be responsive to and control at least the database and the network interface. The system also includes the processor and the database being further configured to implement blockchain technology with respect to the product related information to generate a blockchain ledger of the product related information.

The invention discloses a method and device for issuing a digital promotion ticket based on a block chain, and an electronic device. The method comprises the following steps of: distributing promotional vouchers to a merchant to enable the merchant to distribute promotional vouchers to consumers after obtaining the promotional vouchers, wherein both the obtained promotional vouchers by the merchant and the obtained promotional vouchers by the consumer are stored in a block chain mode, wherein the promotional vouchers are universal promotional vouchers; generating an incentive fund based on themerchant's behavior of writing off the promotional coupons held by consumers, and storing the incentive fund in an incentive pool account associated with the promotional coupons; allocating an incentive money to a subject associated with the promotional coupon. The invention realizes the sharing of promotional coupons among all merchants, and the promotional coupons generate distributable incentive funds in the circulation process, further motivating the enthusiasm of each participant to use the promotional coupons, thereby promoting consumption.

The invention discloses a depth learning method based on a block chain platform and an electronic device. The method comprises: a receiving task publisher selects a depth learning model on the block chain platform; a receiving task publisher selects a depth learning model on the block chain platform. Receiving a training set input by the task publisher; generating a depth learning task according to the training set and the depth learning model; distributing the depth learning task to a computing node in the block chain platform; depth learning is performed on the depth learning task by a computing node to which the depth learning task is distributed. The scheme solves the existing technical problems of high cost of deep learning and low training efficiency, and achieves the technical effect of reducing training cost and improving training efficiency.

The embodiment of the invention relates to a machine room management system and method based on block chain, which comprises the following steps of: acquiring first identity information and second identity information of a user; wherein, the first identity information comprises identity authentication information, and the second identity information comprises information which is collected on thescene and embodies the biological characteristics of the user; determining an identity authentication result based on the matching of the first identity information and the second identity information; determining whether the user can enter the machine room according to the identity authentication result; generating blocks for the first identity information, the second identity information and theidentity authentication result and storing the blocks through the block chain; on the condition that the user is allowed to enter the machine room, the behavior record of the user in the machine roomis obtained, and a block is generated and stored through the block chain. The authentication process and result of the user entering the machine room, and the user's behavior in the machine room canbe completely recorded through the block chain, so that the subsequent visual inspection and the like can be facilitated, and moreover, the real and effective data can be ensured through the block chain, so that the machine room can be effectively monitored.

The invention provides a blockchain operation state collection and transmission method and device and a server. The method comprises the steps of obtaining an event message triggered by a change of ablockchain operation state; carrying out data processing on the event message; and pushing processed data to a browser, thereby enabling the browser to display the blockchain operation state. Comparedwith the prior art, the method, the device and the server have the advantages that on the basis of general characteristics of a blockchain system, the blockchain operation state is pushed to the browser, so the browser displays the blockchain operation state.

The invention discloses a dual-network cloud health platform and a health data processing method. The dual-network cloud health platform is characterized by comprising a collection module, a blockchain data storage node module, a blockchain communication module, a first network cloud server, an intelligent terminal, an artificial intelligent doctor module, a network communication module and a second network cloud server. The dual-network cloud health platform and the health data processing method are used for overcoming the defect in the prior art, can conveniently monitor the health data change and rapidly match an optimal therapeutic schedule according to medical historical information, are convenient to use and have an ideal management effect on health data.

The invention discloses a data processing method and device, a storage medium and a processor. The method comprises the following steps of combining the storage information and the authorization information of a target file, and encrypting the combined information by adopting a first public key of an authorized object to obtain a target data packet; and under the condition that the authorized object requests to access the target file, decrypting the target data packet by adopting a private key corresponding to the first public key of the authorized object, and obtaining the target file from the block chain system based on the decrypted data. Through the application, the problem that the central server is easily attacked when the file is stored on the central server and the access to the file is authorized in the related technology, so that the file is difficult to safely and accurately access, is solved.

A block chain technology-based bag anti-fake and traceability system of the present invention comprises a recording module, a storage module and a querying module, divides the different functions detailedly, separates the establishment process of a bag traceability chain, the recording process of the block information and the querying process of the bag anti-fake information to satisfy the different demands, specifies the authority of each kind of nodes, also strictly limits each kind of requests, thereby guaranteeing the real and credible information. Aiming at the new bags and the second-hand bags, the block chain technology-based bag anti-fake and traceability system also provides two query modes, for the second-hand bags, the historical evaluation of the users and the buyable degree factors also can be queried, thereby satisfying the different anti-fake demands.

The invention provides a traceable commodity transaction system based on a block chain and belongs to the field of commodity transaction. The system comprises a block chain commodity transaction subsystem, a seller platform, a buyer platform, a commodity display platform, a third-party real-time communication subsystem, a commodity identification code recognition subsystem, a commodity identification code, an identification code generation subsystem, a commodity traceability information acquisition subsystem, a commodity production process information acquisition subsystem, a commodity logistics information subsystem and a warehouse-in and warehouse-out delivery inspection subsystem.

The invention discloses an asset mortgage borrowing method and system based on blockchain pass, and the method comprises the steps: obtaining the data of to-be-mortgage assets, and identifying whether the to-be-mortgage assets are mortgage or not; if the to-be-mortgage asset is not mortgage, performing value evaluation on the to-be-mortgage asset, and issuing a chain asset pass with a corresponding value according to an evaluation result; obtaining a borrowing request submitted by a financing party and an asset pass used for borrowing, verifying the asset pass, if the verification is passed, releasing money to the financing party, and collecting the asset pass at the same time; and obtaining a repayment request of the financing party, and after the financing party is confirmed to be repaid, transmitting the asset pass transaction corresponding to the repayment limit to the asset pass transaction to the financing party. According to the method, the physical assets are certified, so that the financial risk is greatly reduced, the loan process is simplified, the loan period is shortened, the reliability and safety of information are ensured, and meanwhile, the certified assets are easy to split, so that a user can flexibly borrow and loan.

The embodiment of the invention provides a federal learning method and device based on a blockchain, and the method comprises the steps: a first node carries out training an ith round of local model based on local training data, determines the gradient information of the trained (i+1) th round of local model, cuts and quantifies each piece of first sub-gradient information in the gradient information of the (i+1) th round of local model based on a gradient cutting quantization rule to obtain each piece of second sub-gradient information, merges every m pieces of second sub-gradient information in each piece of second sub-gradient information according to a gradient merging rule to obtain n types of third sub-gradient information, and performs homomorphic encryption on the n types of third sub-gradient information to obtain n types of ciphertexts, and sends the n types of ciphertexts to the blockchain. According to the method, due to the fact that the first sub-gradient information in the local model gradient information is cut, quantified and merged, and then homomorphic encryption is carried out, computing resource consumption generated by homomorphic encryption can be reduced, and network resources consumed in the ciphertext transmission process can be reduced.

The embodiment of the invention belongs to the field of artificial intelligence, is applied to the field of intelligent transportation, and relates to a population flow prediction method based on intelligent decision. The method comprises the steps of obtaining an urban map; dividing the city map, and generating a city node network by taking a city region in the city map as a node; acquiring historical population information of each node in the urban node network; calculating historical population information of each node through a graph neural network to obtain spatial features and time sequence features of each node; generating a point embedding vector of each node according to the spatial features and the time sequence features; and generating population flow information based on the point embedding vector; wherein the population flow information serves as a node connecting line to be connected with each node. The invention further provides a population flow prediction device basedon the intelligent decision, computer equipment and a storage medium. In addition, the invention also relates to a blockchain technology, and the historical population information can be stored in theblockchain. According to the invention, the population flow prediction accuracy is improved.

The invention relates to an alliance chain consensus method based on grid arbitration, and belongs to the technical field of block chains. According to the method, on the basis of a grid arbitration algorithm, a verifiable random function is adopted to divide nodes of a whole alliance chain system into an arbitration leader group and an arbitration group, regional consensus is achieved through animproved Byzantine algorithm in the arbitration group, and then final confirmation of proposed transactions is completed through the arbitration leader group. Compared with a traditional Byzantine consensus algorithm, the method has the advantages that the throughput of the whole system can be effectively improved, and the overall consensus efficiency of the block chain is improved.

The invention relates to an information pushing method and device based on a block chain, computer equipment and a storage medium. The method comprises the steps of obtaining each block of a block chain; analyzing the block chain, and obtaining multi-dimensional characteristics of a user recorded in each block on the block chain and prediction probabilities of a plurality of pieces of to-be-pushed information corresponding to the multi-dimensional characteristics of the user; and pushing the to-be-pushed information to a user according to the prediction probability. Distributed storage of the operation information and the push information probability of the user is realized through the block chain; multi-dimensional features of the user and the probability of to-be-pushed information are extracted according to the multi-dimensional features; calculation of comparative consumed resources such as user preference feature extraction and the like is directly carried out at the user side, distributed tracking storage is realized, decentralization of feature comparison calculation is realized, the pressure of the server side is greatly reduced, accurate pushing and user requirement mining are realized, and information pushing is more accurate and timely.

A system and method for identifying whether an article is properly presented and duly owned by or licensed to a user and releasing assigned content to the user upon confirmation of such verifiably owned or licensed article. A manipulated user device equipped with at least one camera is deployed to determine if the article is properly presented. The device captures images and the system has the ability to determine from the images and any additional spatial information the orientation and/or position parameters of the article to confirm whether a valid spatial relationship exists between the article and the user device. Due ownership or license is verified by relying on tokens (e.g., Non-Fungible Tokens) and blockchain transaction records. The assigned content released to the user can be contextual and can range from items such as images, music, videos, games, virtual content, augmented content, coupons (virtual or physical), promotions, special offers and the like.

The invention relates to the field of big data, and provides a federated learning method, which comprises the following steps: sending a plurality of corresponding ID intersection requests to a plurality of data providers; receiving corresponding sample data returned by each data provider according to the corresponding ID intersection request to obtain a plurality of sample data, and uploading theplurality of sample data to the block chain; judging whether each piece of sample data has a corresponding federation model or not; if the corresponding federation model does not exist in the sampledata, sending the sample data to a target federation model for training; and if the corresponding federation model exists in the sample data, sending the sample data to the corresponding federation model for training. According to the invention, the precision and the business effect of the federated learning model are effectively improved.

The invention discloses an autonomous adjustment method of a blockchain consensus mechanism. The method comprises the following steps: sorting statistical data of nodes of a whole network; selecting aplurality of front nodes to establish a committee according to a sorting result; deciding whether to replace the consensus mechanism or not via the nodes in the committee according to the current network environment and the whole network node state vote. The method comprises the steps that firstly, nodes are selected to establish a committee, member nodes in the committee are all selected nodes with high activity in a block chain network, and the member nodes are willing to maintain the stability of the block chain network; then according to the network environment and the whole network nodestate in the blockchain network, the nodes vote in the committee to determine whether to replace the consensus mechanism and determine the type of the replaced mechanism, thereby dynamically adjustingthe consensus mechanism in the blockchain network. The security and stability of the blockchain network are improved, and unnecessary resource consumption is reduced.