720 results about "Consensus algorithm" patented technology

The invention discloses a block chain generation method, a data verification method, nodes and a system. The block chain generation method is used for increasing the utilization rate of a storage space and is applied to a block chain system containing M nodes. According to each of the M nodes, the block chain generation method comprises the steps that N pieces of fingerprint information corresponding to N pieces of to-be-written data are acquired, wherein N is greater than or equal to 1; a new block is constructed, wherein the new block comprises a data set and a block head; the data set comprises N pieces of fingerprint information; the block head comprises a Hash value of a block head of a previous block in a local block chain of the node, wherein the previous block is a newly added block in a longest chain of the local block chain; and through a consensus algorithm, a consensus block is determined from new blocks generated by M nodes and is added into the local block chain. In thisway, the storage space occupied by other information of non-to-be-written data in transaction information is saved, and therefore the utilization rate of the storage space and is increased.

The invention discloses a network transaction method and apparatus based on a block chain system. The network transaction method and apparatus based on a block chain system are used for reducing time consuming of transaction and improving concurrency. The block chain system includes multiple levels of block chain network nodes; and the multiple levels of block chain network nodes at least include a first block chain network node of the first transaction party for network transaction, and a second block chain network node of the second transaction party for network transaction. The network transaction method based on a block chain system includes the steps: the first block chain network node generates transaction information corresponding to the network transaction; the transaction information is sent to the second block chain network node of the second transaction party for network transaction; the first block chain network node and the second block chain network node use a consensus algorithm to reach a consensus for the transaction information; and the first block chain network node and the second block chain network node synchronously keep accounts for the network transaction corresponding to the transaction information for which the first block chain network node and the second block chain network node reach a consensus.

The present invention provides a system and a method for sharing based on a blockchain technology. The system comprises: a sharing information management module configured to restrict addition and removal conditions of each concrete entity node and perform verification of nodes in a whole network according to a certificate of authority issued by a third-party CA center; an information node configuration module; a query node configuration module; a blockchain P2P network node configured to broadcast transactions to a blockchain network, wherein each sharing system node on the blockchain networkreceives the transactions and stores the transactions in each transaction pool. Direct sharing of goods is achieved through distributed storage, a P2P network, a consensus algorithm, encryption and decryption, transaction verification and blockchain verification in the blockchain. An initiator and a receiver of goods directly perform sharing exchange through the sharing system.

The invention discloses a disaster recovery cloud storage system construction method based on a block chain technology. The block chain technology is introduced in a cloud storage system construction process. The characteristics of decentration and de-trust of the block chain technology are used to realize the distribution autonomy of storage nodes in a cloud storage system and data exchange and data sharing between the storage nodes based on a consensus algorithm. Compared with the current mainstream centralized cloud service system, the method has the advantages that network nodes can establish many-to-many rather than one-to-many contact relationship, which can greatly improve the transmission efficiency of data; and in the processes of data storage, exchange, upload and download, data block packaging and anonymous exchange and an asymmetric encryption algorithm are used, which greatly guarantees the safety and reliability of the entire ecological chain of data cloud storage. Compared with the current mainstream centralized cloud service system, the method provided by the invention has the advantages that on the basis of improved data safety, the operation efficiency of the system is greatly improved, and the operating cost of a cloud storage service is reduced.

The present invention discloses a digital transaction system, and an account information query method therefor. The digital transaction system comprises verification nodes configured to store latest account information and latest blocks including latest transaction information and latest account indication information in block chains, and to respond to account information query requests from transaction nodes according to the latest account information, wherein the latest account information is generated by updating existing account information by the verification nodes according to latest transaction information, the latest account indication information is generated by the verification nodes according to the latest account information, and the latest blocks are the reference of consensus between the verification nodes and other verification nodes in the digital transaction system according to a consensus algorithm; and the transaction nodes configured to transmit the account information query requests to the verification nodes and receive responses of the verification nodes to the account information query requests.

The invention discloses an automatic registration method for three-dimensional point cloud data. The method comprises the steps that two point clouds to be registered are sampled to obtain feature points, rotation invariant feature factors of the feature points are calculated, and the rotation invariant feature factors of the feature points in the two point clouds are subjected to matching search to obtain an initial corresponding relation between the feature points; then, a random sample consensus algorithm is adopted to judge and remove mismatching points existing in an initial matching point set to obtain an optimized feature point corresponding relation, and a rough rigid transformation relation between the two point clouds is obtained through calculation to realize rough registration; a rigid transformation consistency detection algorithm is provided, a local coordinate system transformation relation between the matching feature points is utilized to perform binding detection on the rough registration result, and verification of the correctness of the rough registration result is completed; and an ICP algorithm is adopted to optimize the rigid transformation relation between the point cloud data to realize automatic precise registration of the point clouds finally.

A method of processing and validating transactions on a multi-chain network including receiving first and second pluralities of transactions, recording the first and second pluralities of transactions to first and second blocks on a first blockchain in a multi-chain network, publishing the first and second plurality of transactions to a first managed topic associated with the multi-chain network on a first messaging server, defining a first published transactions, and transmitting the first published transactions to a first subscriber, defining a first transmitted transaction. Receipt of the first transmitted transaction initiates generation of a first merged block comprising the first published transactions and recording of the first merged block to a second blockchain on the multi-chain network. The first blockchain has a parameter difference from the second blockchain selected from the group consisting of block generation time, transaction throughput, transaction latency, stale block rate, block propagation delay and consensus algorithm used.

The invention relates to a method for detecting lane lines of complex road conditions, which includes: firstly converting colored road images into gray level images and performing median filtering, then performing area of interest division on the filtered images, performing binaryzation processing on road images in the area of interest by using a symmetrical local threshold dividing method so as to extract lane line feature information, and finally performing parallel recognition respectively on a left lane line and a right lane line by adopting a decorrelation random sample consensus algorithm (RANSAC) method based on extracted lane line feature point distribution law. Compared with a traditional RANSAC method, the method for detecting lane lines of complex road conditions greatly improves instantaneity, remarkably strengths robustness and can fast and effectively detect lane lines in terms of complex road conditions caused by illumination changing, shadow shielding, lane line damaging, splotch covering and the like.

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 relates to an intelligent contract gateway based on a block chain CPOW consensus algorithm. The gateway comprises a protocol layer, an expansion layer and an application layer, wherein the protocol layer comprises a network layer and a storage layer, the network layer comprises a p2p network and a CPOW consensus algorithm, and the storage layer stores data information onto a block chain; the expansion layer provides a basic transaction type defined by an agreement mode compatible with an Ethernet virtual machine based on a Bitcoin agreement and a programmable traction script of an original system; and the application layer comprises various services related to the intelligent contract gateway, and helps a user rapidly to get start the block chain services. The intelligent contract gateway provided by the invention provides strong support based on the block chain to third-party developers, is compatible with more applications, and thus the block chain can be more fast applied to a client; the CPOW consensus algorithm provided by the invention solves 51% attack problems, and greatly enhances transaction performance, and thus the application building cost and speed of the intelligent contract gateway based on the block chain CPOW consensus algorithm are greatly improved.

Provided is a process that includes: calling an alert program configured to execute on a decentralized computing platform and access records on a blockchain, wherein: the decentralized computing platform is configured to execute multiple instances of the program to produce multiple instances of candidate results, the decentralized computing platform is configured to determine an output of the alert program in response to the call with a first consensus algorithm, the alert program is configured to verify a cryptographic signature of the call and determine whether an alerting entity is authorized to issue the alert, and the alert program is configured to publish the information about the software asset to alert recipients or to the blockchain upon verifying the cryptographic signature and determining that the alerting entity is authorized to issue the alert.

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 aims at providing a block chain consortium block chain-based bank clearing method. The method comprises the following steps of: constructing a consortium block chain and a consensus algorithm; initiating a deal by a deal initiator; processing deal information by a deal receiver; after carrying out consensus on the deal by each node, carrying out a bookkeeping operation on each node of a block chain by the deal, and writing the deal information on the block chain; and calculating an offset balance amount between a charge-off amount and an entry amount by a participator, if the offset balance amount is a negative number, transferring the offset balance amount, and if the offset balance amount is a positive number, carrying out on-account processing and waiting for the remission of the offset balance amount. According to the method, de-centralized interbank payment and clearing are realized among mutual-trust bank unions, and reconciliation is not required during the settlement, so that the resources are saved and the dissension probability is greatly decreased.

The invention discloses an interconnected chain system structure comprising a data verification method of a parallel link accessing an interconnected link, a data receiving and sending method of the parallel link accessing the interconnected link, an interconnected link, a parallel link, a data verification node and a data receiving and sending node. The method comprises the following steps: the data verification node receives an access request of accessing the parallel link to the interconnected link sent by the data receiving and sending node of the parallel link; the data verification nodegenerates identification information comprising at least one first consensus algorithm in response to the access request, stores the identification information, and broadcasts the identification information in the interconnected link; and the data verification node feeds back access success information comprising the identification information to the data receiving and sending node after confirming that at least one data verification node in the interconnected link receives the identification information. By adoption of the method disclose by the embodiment of the invention, the information can be synchronized, the safety of the interconnected link is improved, and the nodes on different block chains can freely and dynamically log in and log out from the interconnected link network, so that the interconnected link architecture can be freely expanded.

A system and method to perform a system-wide file system image without time smear in a distributed object-based data storage system. A realm manager is elected as an image master using the Distributed Consensus Algorithm to execute image-taking. All pending write capabilities are invalidated prior to taking the system-wide file system image so as to quiesce the realm and prepare the storage system for the system-wide image. Once the system is quiesced, the image master instructs each storage manager in the system to clone each live object group contained therein without explicitly cloning any objects contained in such object group. In one embodiment, a file manager copies an object in the system before a write operation is performed on that object after the image is taken. Neither the cloning operation nor the copying operation update any directory objects in the system. At run time, a client application may use a mapping scheme to access objects contained in the system-wide image.

The invention discloses a block chain technology based data exchange method. The method uses the block chain technology into the field of data exchange and constructs a distributed type autonomous data exchange system based on the block chain technology. The free data exchange among multiple nodes in a network is realized through the design of a consensus algorithm for multiple nodes. At the same time, the invention applies the ellipse asymmetric encryption algorithm in the block chain technology, which can greatly guarantee the security in the data transmission process and can effectively prevent the data from being leaked and illegally tampered. The present invention makes full use of the block chain technology to decentralize the data organization characteristic, changes the point-to-point and the traditional data exchange way based on the multi-point data communication of a specific central platform, and greatly improves the data exchange efficiency and reduces the costs for data transfer and data exchange.

The invention relates to the technical field of electronic voting, and discloses an encrypted electronic voting system and method based on an alliance block chain technology, and the system comprises a member authority control management module, a voting intelligent contract module, and a distributed account book storage module. The voters and the voting initiators register the entity identities of the voters and the voting initiators through the member authority control management module to join the alliance chain network. The voting intelligent contract module is used for achieving specific encrypted voting process automation and comprises a voting party contract, a voting publisher contract and a voting result statistics and contract publishing module. The distributed account book storage module is maintained by nodes in a block chain network, adopts a Raft consensus algorithm for accounting, is public and transparent for the voting party and the voting initiator, and can carry out traceability verification on the voting result. The electronic voting system solves the problem that an existing electronic voting system is suspected by the public in voting secrecy, voting anonymity and voting result correctness and fairness, and is used for various elections and voting activities.

The invention discloses a multi-Agent transaction information protection method based on a block chain technology. According to the method, a transaction execution platform which only has credible andsafe transaction information protection execution environment is established by utilizing a block chain. A transaction process between the buyer and the seller is realized by using the transaction execution platform. Besides, a BFT-Raft consensus algorithm based on Byzantine fault tolerance is adopted, and the method has the advantages that due to the establishment of a multi-Agent e-commerce system, the transaction cost and the user time can be remarkably reduced, and illegal authorization acquisition, use and leakage of transaction information are effectively prevented. The BFT-Raft consensus algorithm ensures that the log is not tampered by applying a digital signature technology and incremental hash in a log replication link. Through a Committed proving mechanism, it is ensured that aselected Leader node must have all log items reaching consensus, the BFT-Raft consensus algorithm can solve the consensus problem in a Byzantine fault-tolerant environment, the number of nodes participating in verification and accounting is greatly reduced, and second-level consensus verification can be achieved.

The invention discloses a visual capture method and device based on a depth image and a readable storage medium. The method comprises steps that a point cloud image is acquired through a depth cameraKinect, the acquired point cloud image is segmented through an RANSAN random sampling consensus algorithm and an Euclidean clustering algorithm, and an identification-needing target object is acquiredthrough segmentation; 3D global characteristics and color characteristics of the object are respectively extracted and are fused to form a new global characteristic; off-line training of a multi-class support vector machine classifier SVM is carried out through utilizing the new global characteristic of the object, category of the target object is identified through utilizing the trained multi-class support vector machine classifier SVM according to the new global characteristic; then the category and the grasping position of the target object are determined; and lastly, according to the category of the target object and the grasping position of the target object, a manipulator and a gripper are controlled for grasping the target object to the specified position. The method is advantagedin that the target object can be accurately identified and grasped.

The invention discloses a supply chain finance application method based on block chain alliance chain technology Hyperledger. The whole structure of the invention is reasonable, the business data of the buyer and the seller are directly linked, the authenticity of the transaction data in the supply chain is ensured, the distrust of the data inconsistency among the parties is reduced, the complicated process and operation of the data repeated confirmation are avoided, the transparency of the transaction and the transparency of the data are ensured, and the basic guarantee is provided for effective supervision. In the supply chain financial business, the transaction data are mostly transformed into effective assets. After the whole transaction process is linked, the problem of repeated pledges of the buyer and seller enterprises to multiple parties is effectively eliminated, and the transaction safety and transparency are guaranteed. The whole process business data and related transaction data recorded by block chain super book are trustworthy, reliable and unalterable shared and distributed book system, which is guaranteed by time stamp, hash algorithm, encryption algorithm, P2P network technology, consensus algorithm and other technologies, but can not be tampered with.

The invention discloses an electronic government affair system construction method based on block chain technology. According to the method, a distributed decentralized data architecture which is developed along with digital encrypted currency and is called as a block chain and a data operation mode are applied on the field of electronic government affair. The block chain is obtained through linking many blocks with same structures. The blocks are utilized for finishing packaging of government affair data with time stamps, a distributed networking propagation mechanism and a consensus algorithm task of distributed nodes. Government affair standard management level and handling efficiency can be greatly improved. Furthermore, according to the method, a D-H asymmetric encryption algorithm is applied in the block chain; and a public key password and a private key password which are different from each other are used for performing encryption and decryption. Safety of a government affair information database can be remarkably improved. The whole model architecture and the operation mechanism of the block chain ensure wide application space of the block chain in the field of electronic government affair.

The invention discloses a transaction method based on a blockchain-based electricity market, comprising the following steps: information acquisition step: acquiring electricity transaction information and obtaining user information according to the electricity transaction information; assigning node step: searching transaction nodes from the system according to user information and Randomly select a trading node and assign it to the user; broadcasting step: send the power transaction information to all other trading nodes in the system by broadcasting; judging step: receive the results returned by all other trading nodes and make the decision according to the consensus algorithm Determine whether the transaction is successful, if so, store the power transaction information on the corresponding blockchain; result sending step: return the corresponding transaction result to the corresponding transaction node of the user, thereby notifying the user whether the transaction is successful. The invention also discloses an electronic device, a readable storage medium and a transaction device. Through the invention, the transaction in the electric power market has the characteristics of good security, high stability, simple operation and the like.