64 results about "Proof-of-stake" patented technology

The invention discloses a credit-based blockchain consensus method for large-scale e-commerce. According to the method, by applying a blockchain to the large-scale e-commerce application scene, the scalability needed by the large-scale e-commerce scene can be achieved, millions of nodes can be supported, the consensus requirement that the service speed of the e-commerce is ten millions per second can be met, energy consumption such as Bitcoins is not needed, and the problem that a blockchain adopting proof of stake (POS) is lack of security guarantee is solved. The method comprises the steps that 1, the structure of the blockchain is composed of an alliance chain environment in a firewall, a gateway environment in a non-military isolation area and a platform in the public Internet; 2, alliance chain members elect a few nodes with a high trust degree from a public environment to serve as first-stage consensus nodes; and 3, a first-stage consensus result is sent to a alliance chain, the alliance chain members perform secondary consensus through voting to ensure the accuracy of the consensus result from the public environment, and then the security requirement is met.

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.

A system, method, and computer program for a blockchain-supported programmable information management and data distribution system for decentralized application development that integrates scalability power with functional decentralized application development environment and high data storage capacity. The system may comprise a virtual machine that supports and unites on-chain logic capabilities and off-chain data management capabilities. On-chain logic capabilities may comprise application of rate-limiting capabilities, use of currency, and delegated asynchronous proof-of-stake functionality. Off-chain data management capabilities may comprise an artifact network, multi-party protocol, and analytic capabilities. Incorporation of smart contracts may be supported directly by the virtual machine.

The invention provides a de-centralization consensus method based on proof of time. The method comprises the following steps that within the time 0-t1, a plurality of users sign time certification data containing a current timestamp by utilizing private keys, and peer nodes where the users belong receive signatures; within the time t1-t2, each peer node selects the best signature in the signaturesreceived by the peer node, packages the signature into a signature data block and carries out broadcasting, after the peer node receives the broadcasted signature, the received signature is comparedwith the best known signature of the peer node, if the received signature is better, the best known signature is replaced and broadcasted, and lastly, all peer nodes select the unique best signature of the whole network; and within the time t2-T, the peer node where the best signature belongs packages a to-be-recorded block and carries out broadcasting, and other nodes pass the verification and accept the to-be-recorded block. According to the de-centralization consensus method and system based on the proof of time and the block chain system, the defects of Byzantium fault tolerance, proof ofwork, proof of stake, proof of delegation stake and other existing consensus methods and the block chains thereof are solved, and the effects of fairness, high efficiency, energy conservation and usability are achieved.

The invention discloses a method for creating a block chain, a device and a readable storage medium. The methods include: creating rights and interests proof mechanism of block chain; creating a hashtimestamp mechanism using random number policy; based on the formed hash timestamp, establishing a mechanism for preventing block chain bifurcation ; based on the above mechanism and random number strategy, creating each new block on the block chain to form a block chain. The adoption of that technical scheme, Competition among the parties entitled to create new blocks does not control random numbers, so that you cannot gain building-block-first privileges, improving the security and non-tampering of block chain transactions, rights and interests are proportional to the driving force of systemsecurity, based on hash-based timestamp, the person who has the right to keep account eliminates bifurcation with the maximum possibility is decided, punishment mechanism for the creators of historical blocks who do not obey the rules and do not participate in the maintenance of several blocks is established, a fair, stable and efficient block chain trading environment is created, the trust modelis optimized, and a good mechanism is provided to control the chain growth rate.

Methods and systems for secure storage and retrieval of information, such as private keys, useable to control access to a blockchain, include: receiving, in a cryptoasset custodial system, a request to authorize a staking operation associated with a blockchain, wherein the staking operation is associated with a private key of an asymmetric cryptographic key pair, the private key is usable to control ownership of a cryptoasset recorded in the blockchain, and the private key is securely held in the custodial system; performing, in response to the request, a portion of the proof-of-stake protocol in a hardware security module using logic designed for the protocol, wherein the logic in the hardware security module is configured to authorize the staking operation by digitally signing an associated staking transaction; and sending the digitally signed staking transaction to another computer to effect the staking operation on behalf of the user.

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 discloses a charging company network transaction settlement method and device. The method comprises the following steps: S1, monitoring, by each network node, transaction information ina blockchain network in real time; S2, performing node equity calculation according to an equity proof mechanism to obtain the network node with the largest equity; S3, collecting, by the network nodewith the largest equity, transaction request information of the network nodes within the current time period, organizing the transaction request information into a block, and publishing the block into the blockchain network through a broadcast manner; S4, verifying, by the other network nodes, the transaction request information of the block, executing S5 if the other network nodes achieve consensus by verification, and returning to S2 if the other network nodes do not achieve consensus by verification; and S5, successfully creating the block, recording the block, and using the block as a parent block for the calculation of the next block. The device is used for implementing the method. The charging company network transaction settlement method and device disclosed by the invention are beneficial to establishing a mutual trust system, supervising the entire transaction process, and building a mutual trust transaction platform.

The invention discloses an agricultural supply chain financial service platform based on a block chain. The agricultural supply chain financial service platform comprises the following core modules: adata layer, a network and consensus layer, an intelligent contract layer, an interface layer, a management layer and an application layer, the data layer performs digital digest and algorithm encryption on the data and stores the data in the form of a block chain; and the network and consensus layer is based on a P2P network and adopts a DPOS + Byzantine-Fault-Tolerant BFT consensus algorithm. According to the invention, through decentralization or multi-centralization, the data cannot be tampered; related orders, receipts and evidence storage information are easy to trace, and non-repudiation is ensured by a public and private key signature mechanism; the data uniqueness avoids the occurrence of one-debt multi-loan and one-debt multi-selling conditions, so that each participant of the supply chain finance establishes a credible channel, the financing pain point is solved, the efficiency of the whole supply chain finance is improved, and all related data is processed through an intelligent contract, is automatic, cannot be artificially intervened and counterfeited, and can be checked in real time.

A system and method for arbitrating a blockchain transaction enables a sender node and a receiver node to perform a transaction with a payment contract, and also record the transaction in the blockchain to protect the sender and receiver node from unfair practices; by preventing the receiver node from transferring received payments until a dispute resolution period that is preset by the sender node has expired. The transaction and payment contract are conducted with a payment condition-checking smart code that executes the transaction only when predetermined conditions have been met. The sender node and the receiver node can elect arbitrator nodes through a delegated proof of stake process. The arbitrator nodes verify the transaction, and review submitted arbitration applications. The arbitrator nodes create an arbitrator report that is also recorded in the blockchain. If dissatisfied with the arbitration, a subsequent arbitration, or an offline dispute resolution node can be requested.

The invention discloses a block chain consensus method based on reputation rights and interests proof. The method comprises the following steps: 1, generating blocks in a reputation rights and interests block chain; 2, removing bifurcations possibly existing in the reputation right and interest block chain; 3, updating the fund balance, the reputation value and the activity degree of the reputation right and interest user; and 4, dynamically updating the parameter coefficient in the comprehensive score. According to the method and the device, under the condition that the block is not easy to tamper, resources consumed when a user generates the block can be reduced, so that more users can generate the block to participate in consensus, and meanwhile, the possibility that honesty users are attacked by malicious users can be reduced.

The invention relates to a fog network unloading decision and resource allocation method based on a block chain technology, and belongs to the technical field of mobile communication. Firstly, an optimal unloading decision is made for different task requirements of mobile equipment, and network resources in the unloading process are optimally allocated, so that the task unloading efficiency is improved; secondly, in order to solve the network security problem, a block chain technology is introduced, transaction is processed through the elected main node to form a new block, and after node consensus verification operation, the new block is accessed to a block chain system. Aims at solving the problem of vote delineating of blockchain nodes, the voting can be influenced by malicious nodes through behaviors such as clustering and the like, a malicious node is elected to become a main node, an improved authorization profit certification consensus algorithm is adopted, a node with high credibility is elected to become a blockchain service node through an election mechanism based on credibility, and transaction information in a newly generated block is supervised and verified in real time in the consensus process.

The invention discloses an interest certificate creation method, an apparatus and a readable storage medium for a block chain. A method for creating a certificate of interest for a chunk chain includes purchasing a token by token, the token being bound to a particular identity of a purchaser, and determining by the purchaser at the time of purchase a chunk number to be mined for the token; a fairrandom number N, i.e. A bit string, is generated from the previous existing block and hashes with the token. The obtained hash value is propagated to each node through the network to determine the accounting right of the next block. The technical proposal of the disclosure adopts the idea that the rights and interests are directly proportional to the driving force of the system guarantee, and creates a fair, stable and efficient block chain transaction consensus mechanism.

The invention discloses a block chain transaction throughput improving method based on a fragmentation technology, belongs to the technical field of block chain networks, and aims to realize the effect of processing different transactions by different fragments by dividing a block chain into a plurality of subnets and dividing to-be-recorded transactions into different fragments through the fragmentation technology; finally, each fragment submits the respective Merkland to the leader node, so that the core node is integrated into a complete Merkland and packaged into a new block, the transaction throughput of the block chain is improved, and meanwhile, the Sybil attack and the double-bloom attack can be effectively resisted on the randomness and the rights and interests of the algorithm.

New consensus methods are provided to utilize a set of virtual machines to serve as both of the mining machines as well as delegates and is achieved by a hybrid mechanism of both of the proof of work and delegated proof of stake. The present disclosure firstly labels virtual machines with different computing power into different categories and vote to elect virtual machines from each category into delegate cluster. When the transaction requests come, the transaction requests are processed in different “rounds” in the time spectrum, and in each “round”, the virtual machines of different category are given equal time windows to perform the mining work. To prevent malicious delegates' attack, the present disclosure also implements a new method to randomize the serving order of each delegate for future “round” by hashing the signature key and mod with the total number of delegates.

The invention discloses a service platform based on a block chain. The service platform comprises the following core modules: a data layer, a network and consensus layer, an intelligent contract layer, an interface layer, a management layer and an application layer; wherein the data layer performs digital digest and algorithm encryption on the data of the service platform based on the block chain,and stores the data in the form of the block chain; the network and consensus layer is based on a P2P network, and achieves data consensus of each block chain node on the premise of decentralizationby adopting a DPOS + BFT consensus algorithm; and the intelligent contract layer comprises a system core contract and an upper-layer application custom contract, and supports loading and upgrading atany time. The service platform based on the block chain is designed into a data layer, a network and consensus layer, an intelligent contract layer, an interface layer, a management layer and an application layer from the architecture, all the modules are combined in a plug-in mode, and the service platform has the advantages of being high in availability, low in coupling and the like.

The invention discloses a software-defined opportunity network node identity verification method based on a block chain, comprising the following steps: firstly, grading each received message by a mobile node, and sending the generated message grading to a corresponding area authentication unit; then, aggregating the received message rating of the mobile node for the same message by a region authentication unit; generating a trust value offset of each message, forming a trust value offset block, selecting a target area authentication unit by adopting a consensus mechanism combining the workload proof and the rights and interests proof, and uploading the formed trust value offset block to a pre-generated public accessible trust block chain. A workload proving mechanism and a miner electionmechanism in a block chain are adopted, a solution for the node identity verification problem in the software-defined opportunity network is provided, the network security can be greatly optimized onthe premise that the original characteristics of the network structure are not changed, and a guarantee is provided for normal internal communication of the software-defined opportunity network.

The invention provides a quantum blockchain construction method based on entrusting profit certification extension, which comprises the following steps: voting by whole network nodes according to theproportion of owned blockchain profit, and electing k super nodes from the whole network nodes; preparing and distributing entangled quantum pairs between each node and each super node, and establishing a QKD channel; generating a security key by the node intending to publish the transaction and the corresponding k super nodes through a QKD channel; printing a verification label on the transactioninformation through the security key by adopting a verification algorithm and then broadcasting the transaction information by the node intending to publish the transaction; respectively receiving the transaction information and then verifying the transaction information by the super nodes; sorting the transaction information in the current time window to generate blocks by the super nodes; negotiating with each other by every two of the k super nodes, if a final block exists, performing broadcasting through the super nodes, and receiving the final block and then adding the final block into the last received block by the common nodes until all the super nodes complete a block output process.

The invention relates to a block chain construction method based on a directed acyclic graph and profit evidences, and relates to two logic main bodies of a client and a block chain node. The block chain nodes divide time into different generations, and a block chain node list of the generation is determined at the beginning of each generation according to node rights and interests and other information, and the client nodes generate application messages through a distributed application DAPP, and encapsulate the application messages into net transaction NTs and send the net transaction NTs tothe multiple block chain nodes through a network; then, the block chain node receives NT to package it into a block chain transaction BT; when the block chain node receives BT, a directed acyclic graph is formed and the weight proof of the unstable NT is updated; when the weight proof exceeds a weight threshold, the NT is stable, and the block chain node executes an application message containedin the stable NT through a contract and updates the state of an account to which the NT belongs. According to the invention, transactions can be confirmed in parallel, and the security and the efficiency are relatively good.

The invention provides a PBFT-based DPoS blockchain consensus algorithm, which defines concepts of credit rating, credit coefficients and the like, and introduces an agent node election model based on credit reward and punishment. Under the election model, network nodes greatly reduce the proportion of abnormal nodes becoming agents by voting against it. Meanwhile, due to credit stability and a time reset mechanism, common nodes need to participate in election voting as much as possible, and the election enthusiasm is effectively improved. In order to solve the problem that the DPoS consensus algorithm cannot process malicious nodes in time in a round of election period, an agent node set and an alternative agent node set are elected, the alternative agent node set is used for replacing nodes which fail in multiple times of block output in the agent node set in time, and therefore the malicious nodes are effectively processed. In another aspect, in order to solve the problem that the DPoS algorithm verification time delay is far greater than the block production time delay, so that the block output efficiency is influenced, the algorithm elects a verification node set, and then introduces the PBFT algorithm to quickly verify the block.

The invention relates to a block chain consensus node selection method and device, computer equipment and a storage medium. The method comprises the steps of broadcasting verification information of the node to other nodes in the block chain, and when a set number of first verification passing information is received, determining the node as a candidate node; and when the node is a candidate node, broadcasting verification information of the candidate node to a plurality of candidate nodes in the candidate node set, and when a set number of second verification passing information is received, determining that the candidate node is a main node. Compared with a traditional method for selecting nodes through proven of rights and interests or a practical Byzantine fault-tolerant algorithm, according to the scheme, multiple rounds of verification are carried out by utilizing verification information formed based on various node information and a verifiable random function, the randomness of node selection is improved, network attacks carried out through predicted nodes are prevented, and the effect of improving the node security is achieved.

The invention relates to the technical field of computer blockchains, and provides a blockchain consensus method based on improved proof of workload and proof of rights and interests. The method comprises the following steps: step 1, counting the computing power of computing nodes by computing power counting nodes in a block chain; step 2, uniformly grouping the computing power of all the computing nodes in the block chain by the computing power statistical node, and allocating a Token value to each computing group before the computing group is added into the block chain; step 3, sending a data storage request by a user, sorting all the calculation groups according to the Token values from large to small; selecting the first k computing groups to respectively package the data into blocks,selecting the computing group which finishes the operation of packaging the data into the blocks firstly as a main node, connecting the blocks into the block chain by the main node, broadcasting messages to other nodes by utilizing a protocol, and synchronizing the states of the block chain by other nodes. The system computing power can be saved, the computing period is shortened, and the problemthat nodes newly added into the network and nodes with few computing resources are not friendly is avoided.

The invention discloses a PeerTrust-based consensus node evaluation method for DPos, belongs to the technical field of delegation right and interest certification, and aims to solve the technical problems of how to improve credibility of nodes, reduce probability that malicious nodes are selected as consensus nodes and improve system security. The method comprises the following steps that: nodes call an intelligent contract to perform identity registration, obtain registration accounts based on an identity statement submitted by the nodes, and store the registration accounts verified to be valid into a global registered account list; trust values of the nodes are initialized, the nodes are taken as candidate nodes in voting, and other candidate nodes voting for the candidate nodes are taken as voting nodes; a final trust value of each candidate node is calculated based on the total node number, the total voting number and the trust value of each voting node; and for all candidate nodes, a part of candidate nodes with high trust values are selected as consensus nodes, and the consensus nodes participate in block generation and verification.

The embodiment of the invention provides a blockchain-based entrusting right proof consensus method and device. The method comprises the steps: electing candidate bookkeeping persons and current bookkeeping persons based on weights in nodes participating in bookkeeping; after the candidate bookkeeper and the current bookkeeper finish election, keeping an account by the current bookkeeper; after bookkeeping is finished, sending a message to notify other verification pools to verify the bookkeeping result, and executing a corresponding reward and punishment mechanism on the bookkeeping person in the current period according to the verification result; and performing sorting operation according to the weights of the candidate bookkeeping persons, and selecting the candidate bookkeeping person ranking the first as a new bookkeeping person. According to the embodiment of the invention, the current-period bookkeeper and the current-period candidate bookkeeper are elected based on the weights, so that the problem that the terminal nodes cannot vote in time can be avoided, and malicious nodes can be effectively eliminated by comparing the difference of the bookkeeping results of each bookkeeping terminal; and considering the rights and interests of each bookkeeping terminal during reward and punishment design of the bookkeeper in the current period, so that the enthusiasm of each bookkeeping terminal in the verification pool to participate in bookkeeping can be stimulated.

The invention discloses a safe and supervisible right proving method and system under a fragmented block chain. The method comprises the following steps: a new node requests to join a public chain, and a supervision server in a supervision alliance chain authorizes a block chain to register a certificate to authenticate the identity of the node; a user initiates a transaction, a supervision agent in a supervision alliance chain verifies the transaction, a consistency protocol based on PBFT is utilized to achieve a consistency sequence of effective transactions, and the transaction sequence is sent to a fragmented public chain network; the supervision agent and the public chain node conform to the transaction sequence and correctness by using a consistency protocol based on PBFT and a right proving mechanism based on hardware, and store the transaction content in the supervision alliance chain and the public chain; the hardware module executes final transaction confirmation by using a counter of the random number generator to realize transaction transfer; and malicious public chain nodes with no interest relationship are supervised by using transaction retrieval. According to the invention, node supervision under the distributed block chain system is realized, and safe and reliable right proof under the fragmented block chain is realized.

The invention discloses a consensus algorithm for delegation rights and interests certification with dynamic trust, relates to the technical field of block chains, and adopts the schemeto improve thereliability and privacy of consensus nodes on the basis of achieving distributed node consensus. The scheme includes: enabling a block chain network to define trust value attributes and evaluation value attributes for nodes ; initializing a trust value and an evaluation value of each node; calculating a local trust value for the related node based on the trust model and the historical transactionrecord in the previous election period, and further calculating a global trust value of each node; introducing an evaluation criterion comprehensively considering the voting number and the trust value, calculating an evaluation value for each node, selecting witness nodes, and generating a witness node list; and enabling the witness nodes in the witness node list to generate a block in turn, carrying out ring signature on the block message, enabling the other witness nodes to verify the ring signature and the validity and validity of the block, and determining whether the block reaches a consensus according to a verification result.

The embodiment of the invention discloses a delegated proof of stake (DPoS) consensus method and device, electronic equipment and a storage medium, which are applied to a block chain network. The block chain network comprises nodes in a normal state, a good state, an abnormal state or a malicious state. The method comprises the following steps: obtaining a first node in the block chain network and a new block generated by a new transaction in the block chain network; under the condition that the new block meets preset conditions, converting a first state of the first node into a second state, and obtaining an initial credit value of the first node in the second state, wherein the initial credit value represents the trust degree of the first node in the second state; obtaining a voting result of the new block, performing credit reward and punishment on other nodes according to the voting result and the initial credit value, and determining credit values of the other nodes; and determining a second node of which the credit value is smaller than a preset threshold value, and deleting the second node.