594 results about "Consensus method" patented technology

The invention discloses a block chain data comparison and consensus method used for hash value calculation of content of each transaction. By changing the random numbers, the numbers of some bits of the hash values are set not to be repeated in a time period, and can be called as unrepeated serial numbers. Accounting servers are used to compare the numbers of the preset bits of the hash values to determine whether the transactions are identical or not. The unrepeated serial number comparison can be carried out in a way of establishing the Merkle-like tree, and because the numbers of the preset bits of the hash values of the transactions are not repeated, and can be used as the serial numbers, and can be disposed in the Merkle-like tree according to the certain rule, and therefore for different accounting servers, the positions of the hash values of the same transaction on the Merkle trees are totally identical, and the differences can be found out quickly, the data transfer amount can be reduced, and the time required by the consensus can be greatly accelerated.

The invention discloses a byzantine-fault-tolerant consensus method applied to a block chain. The method comprises the steps of specifying a certain number of right and interest accounts and initial consensus accounts in an initiated block of the block chain; after a consensus process is started, for the height h of a current block, selecting a consensus account to initiate a proposal of a new block according to a fixed random algorithm in a consensus account list; receiving the proposal and voting a block with the height of h by other consensus nodes; within a period of time, if the number of votes exceeds eta 1, representing that a consensus is formed, and starting the consensus of a block with the height of h+1 in the next round; if the number of votes does not exceed eta 1 but exceeds eta 2, representing that the consensus is possibly formed, broadcasting a voting request of the block in the previous round, and continuing to wait for a period of time; and if the number of votes does not exceed eta 2, cancelling the proposal in the round and re-performing the proposal of the new block. Therefore, computing resources can be saved; a large amount of blocks can be continuously generated; and computing power competition is avoided.

The invention provides a block chain consensus method based on a DPOS and nodes. The method comprises the following steps that a transaction node generates a transaction request of executing an intelligent contract and broadcasts the transaction request to a block chain network; an accounting node receives the transaction request, then executes the intelligent contract according to the transaction request, stores a generated contract execution result and a transaction request in a newly-generated block and broadcasts the block to the block chain network; and an agent node receives the block, then executes the intelligent contract according to the transaction request and verifies the contract execution result. By using the technical scheme provided in the invention, a common node does not need to verify the contract execution result so that a calculating capability of a whole network can be effectively increased.

The invention discloses a block chain grouping consensus method and system. The method comprises the following steps: transaction verification nodes receive transactions broadcasted in a block chain network, sign the transactions and send the signed transactions to the block chain network when the transactions are checked to be legal; a specific transaction packaging node receives the signed transactions, verifies whether the signatures of the transactions are signatures of the transaction verification nodes, and if so, carries out associated storage on the transactions and the signatures; the transaction packaging node enables transactions meeting preset standard in a transaction pool to be packaged into blocks; the blocks are added to a block chain copy of the transaction packaging node itself, the blocks are signed, and the signed blocks are broadcasted in the block chain network; and after other nodes except the transaction packaging nodes receive the broadcasted signed blocks, and the blocks are added to block chain copies of the other nodes. According to the scheme, the system and method can carry out grouping on the nodes, realize different functions, and realize authority control.

The invention discloses a blockchain consensus method and system, and a computer readable storage medium. The method includes: obtaining information of each transaction in the same batch through a leader node, packaging the obtained information of each transaction to form a block, and broadcasting the formed block to a following node in a blockchain network; verifying the information of each transaction in the block through the leader node, and verifying the received information of each transaction in the block through the following node; and broadcasting voting information aiming at the blockand performing blockchain consensus based on the voting information through each node after passing of verification of the information of each transaction in the block through each node. According tothe method and system, and the computer readable storage medium, the leader node and the following node verify the information of each transaction in the block in parallel and broadcast the voting information after verification to perform consensus, parallel execution of the consensus process is realized, the consensus time is reduced, and the blockchain consensus efficiency is improved.

The invention discloses a union block chain consensus method, which is applied to a union block chain of a block chain. The method comprises the steps of building a node reputation model according tobehaviors of nodes in a consensus process based on a classical PBFT algorithm; calculating trust values of the nodes; fusing the trust values as speaking rights of the nodes in the consensus process to a consensus method; and finally forming a consensus method fusing the reputation model. The speaking rights of the nodes are distinguished in the consensus process of the nodes, so that real scene demands are met; and malicious nodes are identified and deleted, so that system continuous reliability is improved and consensus delay is shortened.

The invention discloses a consensus method based on a cross-chain transaction, a device thereof and a storage medium. The cross-chain transaction is the transaction among a plurality of parallel chains. The plurality of parallel chains are connected with an interconnecting chain. The consensus method comprises the following steps of randomly determining a to-be-verified parallel chain in the plurality of parallel chains according to a preset parameter; confirming a cross-chain transaction which is initiated by the determined parallel chain, and performing broadcasting to the interconnecting chain for performing consensus verification. Therefore the consensus method, the device thereof and the storage medium have advantages of greatly reducing a cheating risk, improving safety in cross-chain transaction, greatly reducing calculation amount, improving processing speed in cross-chain transaction and supporting dynamic adding and quitting Internet by a block chain node.

The invention discloses a block chain consensus method and device. The method comprises the following steps that each consensus node receives to-be-stored business data sent by a business acceptance platform; each consensus node generates a preprocessing block according to the to-be-stored business data; when the consensus node is a leader node, the preprocessing blocks are sent to various follower nodes to carry out consensus verification after the preprocessing blocks pass consensus verification; and when the consensus node is not the leader node, the preprocessing blocks are sent to the leader node. According to the method provided by the embodiments of the invention, after each consensus node receives the to-be-stored business data, the corresponding preprocessing block can be created, and when the consensus is carried out on the preprocessing block, the leader node is firstly verified, and the leader node only sends the preprocessing blocks to the various follower nodes to carry out consensus verification after verification, so that any consensus node can initiate consensus at any time. A process of initiating the consensus is simplified and the efficiency of the block chain consensus is improved.

The invention discloses a node consensus verification method under a league chain network through an asynchronous mode. Each node takes a transaction request from the head of a buffer queue to act as a transaction sequence to be submitted and then encrypts the sequence by using threshold encryption; each node broadcasts the encrypted transaction sequence, ensures the integrity of the transmitted message by using an erasure code and ensures message consistency of different nodes by using a Merkle tree; and all the nodes vote the transaction sequences by using the binary Byzantine consensus agreement to reach a consensus, each node waits for local receiving all the voted transaction sequences and then decrypts the transaction sequences by using threshold decryption so as to finally obtain the decrypted transaction information to act as the transaction request written in blocks within the period. The method is completely decentralized, the system has no timeout mechanism and the broadcast message completely depends on the network bandwidth so that the method has higher network throughput when a large number of nodes exist in the network in comparison with the conventional synchronization Byzantine fault tolerance consensus method.

The invention discloses a blockchain consensus method based on a deep learning training task. The method includes the following steps: all blockchain participation nodes jointly maintain an account book record, any node can publish transactions, the transactions can be distributed to each node through a P2P consensus network, the P2P consensus network may have deep learning task nodes, deep learning tasks can be distributed to all participation nodes, an accounting node combines the deep learning tasks to reach a consensus through a consensus mechanism between the nodes, and transaction confirmation is completed. According to the scheme of the invention, artificial intelligence and a deep learning technology are combined, the proof of work of a blockchain common-chain mining process is added to the deep learning tasks, the problem of energy waste caused by acquiring the accounting rights through a traditional Hash challenge mode can be effectively solved, and the problem of deep learning task training can also be solved to a certain extent; and meanwhile, the proof of work of the mining process retains part of the challenge portion that uses a Hash algorithm SHA256, and thus the randomness of the mining process can be ensured, and the phenomenon that the deep learning giant monopolizes the accounting rights can be avoided.

The application discloses a blockchain consensus method, device and system. A consensus algorithm is designed as independent consensus units which are different from a traditional blockchain consensus. A consensus unit set is formed by the consensus units. When service data to be subjected to consensus is obtained, the service data can be allocated to the consensus units in the consensus unit set according to a set distribution rule so that the consensus units can perform consensus on the service data. Therefore, for the disordered service requests, consensus processing can be performed in parallel through multiple consensus units to simplify the sequential processing of a conventional consensus algorithm, improve the processing efficiency and throughput of out-of-order service requests, and improve the operation performance of a blockchain network.

The invention is applicable to the field of internet technology improvement, and provides a voting-based consensus method. The method comprises: S1, selecting a duty housekeeper, and determing, by theduty housekeeper, whether the upcoming block is a special block; S2, sending the Pre-Block generated by the duty housekeeper to all member nodes and then waiting for signatures of members, and determining whether the number of signatures of the member nodes received by the duty housekeeper is greater than half of the signatures of the members; S3, determining whether the valid block timed out; and S4, determining whether the valid block is a special block. In terms of compliance regulation, the alliance node is allowed to fully control the generation and confirmation of transaction data. Compared with the public chain algorithm, the controllability of the system is reflected in the fact that, only half of the members agree,the data on the chain can be maintained and the auditor can be provided with the required data.

The invention discloses a block chain adaptive consensus method based on dynamic authorization and network environment perception; the method comprises the following steps: 1, clustering block chain network nodes according to geological positions, and selecting one authorization representative from the same cluster; 2, allowing the authorization representatives selected from all clusters to form all consensus nodes that verify this transaction, wherein a Byzantium fault tolerance algorithm is employed among the consensus nodes so as to reach a consensus that whether this transaction is established or not; 3, adjusting or re-clustering according to network scale, topology, resource or business type changes; 4, updating authorization representatives in the next deal after one deal is verified. The advantages are that the method can set up a fast and credit synergy mechanism among distributed edge clouds based on block chain, so edge nodes can fast and effectively reach consensus withoutany trust basis, thus solving the low throughput, high time delay and low efficiency problems of a consensus algorithm that uses workload proves as representatives.

The invention discloses a block chain DPoS (Delegate Proof of Stake) consensus method based on a trust mechanism. According to the method, concepts of trust degree and trust energy levels are importedfor nodes in a block chain system; the nodes with a trust energy level of error cannot participate in proxy node competitive election; proxy nodes are elected through utilization of a trust authoritymechanism; accounting nodes are extracted from the proxy nodes through adoption of a verifiable random function; and in a block chain network operation process, trust reward and penality are carriedout on node behaviors, and interruption and kickout policies employed for the accounting nodes of which trust energy level is reduced to the error energy level. According to the method, through tracking of the trust energy levels of the nodes and through trust reward and penality of the nodes, a probability that malicious nodes become the accounting nodes is reduced; participation active degree ofcommon nodes is improved; reliability of the whole consensus method is ensured; the trust degree is taken as a delegate proof of stake, so additional token money distribution is avoided.

Embodiments of the present invention provide a block chain consensus method and system, belonging to the technical field of block chains. The method comprises the steps of for a to-be-generated new block each time, allocating, by an allocating node according to a preset right allocation rule, a billing right to any member node, wherein in the same time period, the quantity of the allocating node is one, the allocating node is selected by member nodes, and a plurality of member nodes are available; and performing block body data writing on a block body of the new block by the member nodes acquiring the billing right. The method realizes the basic function of the block chain consensus, and further, the block chain consensus rate is high, the costs are low, and the method and system are easy to realize.

The embodiment of the application discloses a consensus method and device. The method includes: monitoring triggering on a view switching condition by a master node of a block chain, selecting a succession node by the master node of the block chain when triggering the view switching condition is monitored; and switching a current view to a view, which takes the succession node as a master node of the block chain, by the master node of the block chain according to the succession node to enable the successive master node of the block chain to initiate consensus. By utilizing the embodiment of the application, view switching is all initiated by the master node of the block chain without the need for an additional consensus process, and thus an additional computation amount and processing time consumption in the block chain can be reduced.

The invention discloses a block chain system consensus method and device based on an improved clustering algorithm. The invention relates to the field of block chains. The method comprises the following steps: enabling the first clustering center node to receive a plurality of requests, packaging the plurality of requests into blocks; broadcasting to the subconsensus cluster to which the subconsensus cluster belongs for consensus; if the block passes the consensus, enabling the block to pass the consensus, broadcasting the blocks to a backbone consensus cluster for consensus; if the consensusof the backbone consensus cluster is passed, enabling each clustering center node to digitally sign and broadcast the block; packaging the received digital signature set and the block into a submission message, broadcasting the submission message to a sub-consensus cluster to which the submission message belongs, receiving the submission message by each non-clustering center node, verifying the digital signature set, and if the transaction content of the block is verified and executed, storing the block in a chain. According to the block chain system consensus based on the improved clusteringalgorithm, the communication frequency and the data transmission amount required by single consensus are reduced, and the working efficiency of the whole block chain system is greatly improved.

The invention is applicable to the field of Internet technology improvement, and provides a blockchain consensus method based on a trust relationship. The method comprises: S1, quantifying the trust relationship between nodes according to transaction and block data; S2, according to trust relationship between the nodes, constructing a trust relationship diagram and generating a trust matrix; S3, iteratively calculating the trust value of each node by using the trust relationship of the nodes of the whole network; and S4, randomly selecting a representative node as the master node with the billing right each round of consensus, and selecting, by the master node, several transaction creation blocks from the transaction poo. The representative mechanism is adopted to professionalize the accounting nodes, which reduces the consensus cost, saves energy, and improves the efficiency of the node consensus and the expansion capability of the algorithm. The representative node is selected basedon the trust relationship, and does not depend on the token of the blockchain, so that the billing right is concentrated on a few 'rich people'.

The invention relates to a block chain consensus method. The method comprises Validators, a Validator set, a Vg, a fund account and a hypothecated account. In the consensus method, a margin mechanismis introduced, users can become the Validators to vote only after margin is paid, and once a certain Validator votes dishonestly, a system fines the margin of the Validator or even disqualifies the Validator. After the margin mechanism is introduced, the evil cost of the Validators is higher than the non-evil cost, the nothing-at-stake problem is solved, and the high efficiency of the system is also guaranteed. After a block chain system generates blocks, N Validators are randomly selected during next round of consensus to vote for legality of the next block, and if the Validators have different opinions, voting continues till the legality of the next block can be judged.

The embodiment of the application discloses a consensus method and device based on a block chain. One block chain node includes a first server, a second server and at least one database. The method includes: storing consensus data, which is required for executing consensus, by the database to enable the first server and the second server to invoke the same in a process of executing the consensus; when abnormity of the first server appears before executing the consensus or in the process of executing the consensus, replacing the first server by the second server to acquire the consensus data from the database, execute the consensus according to the consensus data, and generate a consensus result; and storing the consensus result in the database by the second server. By utilizing the embodiment of the application, the normal server in the node can take over the abnormal server to acquire the consensus data from the database and execute the consensus, thus normal performing of the consensus is guaranteed, a success rate of the consensus process can be increased to a certain extent, and then the service processing efficiency of the block chain can be improved.

The invention relates to a block chain consensus method. A client sends behavior information carrying a behavior request to a master node; the master node receives the behavior information, and sendsan identification generation request carrying the behavior request to a first trustable device; the first trustable device generates identification information carrying a unique number of the behaviorrequest, and sends the identification information to the master node; the master node broadcasts the identification information to all slave nodes, implements the behavior request, and sends a generated implementation result to the client; each slave node receives the identification information, and then sends an identification verification request carrying the identification information to a corresponding second trustable device; each second trustable device verifies validity of the unique number in the identification information; each slave node receives a validity result returned from thecorresponding second trustable device, then implements the behavior request, and sends a generated implementation result to the client; and the client determines a consensus result based on the received implementation result. The block chain consensus method reduces network and hardware overheads.

The present invention is direct a two-mode blockchain consensus protocol and a system implementing such a protocol. The system includes a plurality of node computers (and a communications network connecting the plurality of node computers. The plurality of node computers includes a first node computer, a collecting node computer, a committee of node computers, and one or more node computers that operate based on proof of work algorithms. Each node computer in the plurality includes a blockchain consensus software application running on the processor of the node computer. The blockchain consensus software application is adapted to connect to the plurality of node computers that are connected to the communications network. The blockchain consensus software application implements the two-mode blockchain consensus protocol. Through the software application, the plurality of node computers operate to reach a consensus on adding data to a public ledger.

The invention relates to a block chain consensus method based on credit evaluation, relates to the technical field of block chain consensus, which improves the enthusiasm of nodes by introducing a credit evaluation mechanism and a voting reward and punishment mechanism based on credit, optimizes a consistency protocol and a checkpoint protocol of PBFT, and improves the efficiency and flexibility of a system. According to the method, whether the nodes participate in global consensus or not is determined according to the credit evaluation of the nodes, the nodes generating account book information are selected in an election mode, dynamic credit adjustment is conducted on the node credit according to the consensus result, and benign operation of the system is maintained. By using the methodprovided by the invention, the probability that abnormal nodes participate in consensus can be greatly reduced in long-term operation, so that the efficiency of the system is effectively improved, andthe stability of the system is remarkably enhanced.

The invention provides a data inquiry method and system, consensus method and system, apparatus and storage medium. Each node of a block chain network respectively stores a Merkel tree of each block,and a global index table corresponding to the Merkel tree of each block. The version number of the version is a block height, wherein the query instruction includes the queried first block height; a target data is look up in that global index table according to the height of the first block. By configuring the corresponding Merkel tree, The global index table with the block height as the version number, and searching the target data in the global index table through the queried block height, can complete the query of the sub-node data of Merkel tree leaf in the block chain through one read operation, thus greatly improving the data reading performance of the system.

The invention discloses a block chain consensus method. The method comprises the following steps: establishing a Hash ring, and mapping a node and a Hash value of a virtual node thereof, and a Hash value of a block to the same Hash ring; determining the node capable of receiving a verification message and producing the next block right according to the address mapped to the Hash ring from the current block, wherein the node is the leader node, and the other nodes are follower nodes, the leader nodes adds the current block into the block chain after receiving the message that more than half follower nodes pass the current block verification, and broadcasts a confirm message and a packed next block content to the follower node; the follower node receives the broadcast message and adds the current block to the block chain when the message verification is passed, and then verifies the next block, and sends the verification message to the next leader node.

Disclosed in the utility model is a virtual viewpoint rendering method. The method comprises the following steps: obtaining a set of left and right viewpoint images shot by a camera and carrying out SIFT feature extraction on the set of viewpoint images to generate feature points and a feature vectors; carrying out Euclidean distance-based feature matching on the feature points of the left and right viewpoint images by the feature vectors to obtain a matching point pair set; calculating a basis matrix for the matching point pair set by using a random sample consensus method and an eight-point method; using homography decomposition to calculate homography matrixes of the left and right viewpoint images based on the basis matrix and using the corresponding homography matrixes to correct the left and right viewpoint images; carrying out stereo matching on the corrected left and right viewpoint images and generating an intermediate viewpoint image by interpolation and synthetizing; carrying out postposition conversion on the synthetized intermediate viewpoint image to obtain a virtual viewpoint image; and carrying out hole filling on the virtual viewpoint image and outputting a final virtual viewpoint image. According to the invention, the real-time performance is improved; the application range is expanded; and software has been made based on the method and is applied to experiment and application.