34 results about "Multisignature" patented technology

Systems and methods for computer-implemented commodity transactions using blockchain-based smart contracts. A server with memory executes application to authenticate buyer and seller, receive listing with commodity identifier, quantity, quality, delivery terms, price; generate smart contract specifying participant identifiers, wallet or banking info, order and contract IDs, milestone events, settlement terms; commit contract to blockchain; escrow funds associated with contract; obtain shipment, inspection, and delivery status via oracle; verify milestone satisfaction; release escrowed funds accordingly; record settlement on chain; and update database. Modules may include compliance to compute taxes and fees, identity to perform KYC / AML, and dispute resolver to execute predefined remedies. Optional multisignature escrow and fiat or crypto settlement are supported. Executions store hashes and ledger indices to provide tamper evident audit trails.

The invention relates to a block chain on-chain and off-chain linkage query method and system based on a decentralized oracle machine, and the method comprises the steps: obtaining to-be-stored multi-modal data, storing the multi-modal data in an off-chain manner, obtaining a data abstract through abstract calculation, and obtaining a label and a value of the label through information labeling; constructing a time index; storing the time index, the label and the value of the label in a storage contract deployed on a chain; the storage under the chain synchronizes the data abstract and the storage address to an oracle contract deployed on the chain, and the oracle contract is subscribed by a decentralized oracle network; the storage contract responds to the user query and is sent to the oracle contract, and the nodes in the decentralized oracle network generate integrity proof based on the subscribed user query; and the decentralized oracle machine network aggregates the digital signatures of the nodes to obtain multiple signatures reaching a threshold value, and sends the original data, the multiple signatures and the integrity proof corresponding to the user query to the user to realize the block chain up-chain and down-chain linkage query.

A request to perform an action related to a smart contract deployed on a blockchain may be received at a database system. The smart contract may be associated with a multi-signature authorization policy including one or more signature criteria for performing the action. A respective signature request message may be transmitted to a plurality of recipients. The signature request messages may identify the smart contract and the action. A plurality of signature response messages may be received. Two or more of the signature response messages may include a respective signature generated based on a respective private cryptographic key. An action execution message may be transmitted to execute the smart contract to perform the action. The action execution message may include the two or more signatures. The smart contract may be configured to perform the action when the two or more signatures comply with the multi-signature authorization policy.

The invention discloses a safe and efficient lattice-based multi-signature method, which introduces an ownership proving mechanism for verifying that a signer holds a legal key pair, and effectively prevents a malicious signer from controlling an aggregation public key to generate a forged signature by forging a public key. And signature participants are organized by adopting a homomorphic commitment mechanism and a tree structure, so that the interaction turns and the communication data volume required in the signature process can be effectively reduced. The tree structure localizes communication between participants, so that the overall bandwidth consumption can be reduced, the aggregation efficiency is improved, and good adaptability and expandability are shown in a large-scale distributed system. Compared with a traditional lattice-based multi-signature scheme, the method has the advantages that through structure optimization and process simplification, the communication data volume and the computing resource consumption can be remarkably reduced while the security is maintained, so that the scheme has higher feasibility and efficiency advantages in practical application.

Techniques are presented for a blockchain-implemented method and system of controlling use of or access to a parking space. The method comprises generating a blockchain transaction indicative of a condition on use of, or access to, the parking space, the blockchain transaction comprising a multi-signature script requiring a plurality of signatures for completion of the blockchain transaction; providing a first subset of the plurality of signatures to the blockchain transaction to generate a partially signed signature script to partially complete the blockchain transaction; and responsive to the condition on use of or access to the parking space being satisfied, providing a second subset of the plurality of signatures to the blockchain transaction to fully complete the blockchain transaction.

The invention discloses a light client communication method, system and device based on a consensus committee, and a storage medium, belongs to the technical field of block chains, and solves the technical problem that an existing light client protocol still has obvious limitations in the aspects of storage and communication overhead, security and consensus mechanism compatibility. The invention discloses a light client protocol compatible with various consensus mechanisms and having universality and security, the protocol designs a consensus committee dynamic election mechanism without a trusted third party based on chain quality attributes, and provides a concise and efficient proof generation normal form in combination with weighted multiple signatures. On the premise of not depending on a centralized relay, a light client protocol keeps communication and storage complexity lower than a sub-linear level, and security threats such as Eclipse attacks and the like are effectively defended.

The invention relates to a cross-fragmentation block chain transaction control method. The method comprises the steps of performing initial logic fragmentation based on multi-dimensional performance indexes and historical behavior data of nodes; behavior characteristic data generated by the nodes in the actual transaction process are collected, and node reputation values are calculated and updated through a sliding window weighted average and time decay model; each logic fragment operates as an independent consensus unit, and an improved PBFT consensus protocol is adopted to perform transaction sorting and block generation; if the transaction relates to cross-fragmentation, screening high-reputation nodes, executing three-layer authentication of subjective, objective and recommendation trust, and using a BLS multi-signature verification path; and after the transaction is completed, synchronizing the state of each fragment, executing excitation or punishment on the node according to the transaction participation condition, and updating the reputation value of the node. According to the method and the device, dynamic screening, multilayer verification and excitation control of the cross-fragment transaction nodes can be realized, so that the system expansibility is improved, and the security and the adaptive capability are enhanced at the same time.

The present disclosure generally relates to methods, systems, apparatuses, and non-transitory computer readable media for managing cryptocurrency. A cryptocurrency management system has a cryptocurrency management device (CMD), a mobile communication device (MCD), and a cryptocurrency management server (CMS) that are each configured to store a respective private key for use in generating a respective authenticating signature for a multi-signature address of a cryptocurrency network. Any two of the three authenticating signatures capable of being generated by the CMD, MCD, and CMS may be combined to generate a fully authenticated request for transferring cryptocurrency associated with the multi-signature address. The system provides the user with a flexible self-custody solution that permits him or her to transfer cryptocurrency without having to access the private key stored at the CMS. However, the CMS enables for recovery in the event of loss or unavailability of one or both of the CMD and / or the MCD.

A blockchain system has an identity-based blockchain account including a primary chain, a secondary chain, and at least one key book applying to the account, the at least one key book having a key page. The system includes: a hardware processor; and a memory device storing instructions. When the instructions are executed by the processor, they cause the processor to: record a multi-signature transaction originating from the account in the secondary chain; associate the transaction with the key page of the at least one key book, the key page including (i) a signature-authorization rule, and (ii) a plurality of keys corresponding to a plurality of transaction authorizers; record, in the secondary chain, an authorization of the transaction from a transaction authorizer of the plurality of transaction authorizers; and once a number of authorizations recorded on the secondary chain satisfies the signature-authorization rule, record the transaction on the primary chain for execution.

The invention relates to a method comprising a quantum-resistant lattice-based accountable subgroup multi-signature scheme.

The invention discloses a traceable multi-signature method supporting a distributed aggregator and lightweight setting, which is characterized in that a decentralized signature generation mechanism is realized by adopting a cryptographic method comprising bilinear pairing, a linear homomorphic time lock, a cryptographic hash function and a BLS signature; the method specifically comprises the steps of system initialization, key generation, authorization generation and aggregation, prompt generation, partial signature and verification, authorization verification, signature aggregation, authorization revocation, signature verification and the like. Compared with the prior art, the method has a decentralized key generation mechanism, a distributed aggregator mechanism and a signature accountability function, so that high communication overhead caused by the use of a distributed key generation protocol and a single-point fault possibly caused by excessive dependence on a single aggregator are avoided; and meanwhile, a strong association mechanism between the signer and the final multiple signatures is established, and the signer is responsible for the signature behavior of the signer, so that the problems of low efficiency and high centralization of aggregators caused by dependence on a DKG protocol are effectively solved.

The application relates to a multi-signature method, a multi-signature verification method and a device of a blockchain platform. The multi-signature method of the application acquires a signature address corresponding to a multi-signature transaction, thereby determining signature data of the multi-signature transaction, and then encrypts user signature data in the signature data by using a locally pre-stored private key to cover the user signature data, thereby realizing an encryption process of the multi-signature. After the encryption is completed, a signature user list, an updated signed user list and a signature threshold are used to perform an operation of a blockchain chaining process, thereby broadcasting the updated signature data to the blockchain. The application can effectively apply a multi-signature scheme to the blockchain.

The application belongs to the technical field of blockchains, and particularly relates to a resource allocation method, a resource allocation device, a computer readable medium and an electronic device. The resource allocation method comprises the following steps: sending a contract template for agreeing on a resource allocation rule to a transaction platform node in a blockchain network, so that the transaction platform node performs content filling and signature processing on the contract template to obtain a single-party signed smart contract carrying a digital signature of the transaction platform node; sending the single-party signed smart contract to a transaction subject node in the blockchain network, so that the transaction subject node performs content checking and signature processing on the single-party signed smart contract to obtain a multi-signature smart contract carrying a digital signature of the transaction platform and a digital signature of the transaction subject; performing signature checking on the multi-signature smart contract, and allocating resources to the transaction platform node and the transaction subject node according to the multi-signature smart contract that passes the checking. The method can improve the reliability and credibility of network transactions.

This application relates to the field of data security technology, specifically to a method and system for verifying the anti-counterfeiting of digital property rights certificates. The method includes: generating a digital property rights certificate based on user-submitted property rights information; constructing multiple sub-tasks for multiple contents requiring digital signatures and sending them to different participants; determining the signing order of participants performing parallel multi-signatures according to their historical signing times to generate an initial multi-signature; setting a key update mechanism to regenerate a new multi-signature; and randomly verifying the generated multi-signature multiple times to verify the validity of the digital property rights certificate. This application aims to improve the efficiency and reliability of anti-counterfeiting verification of digital property rights certificates.

A computer implemented method for generating a multisignature transaction for a blockchain comprising: receiving a first output and a non-signature portion of a first input, the first input comprising an outpoint to a first spendable transaction output encoding a multisignature requirement; electronically signing the first output and the non-signature portion of the first input, thereby generating a signature for satisfying the multisignature requirement when included with: (i) an associated sighash single flag, and (ii) at least one other signature; receiving a second output and a non-signature portion of a second input, the second input comprising an outpoint to a second spendable transaction output encoding a signature requirement requiring at least one signature; and electronically signing the second output and the non-signature portion of the second input, thereby generating a signature for at least partially satisfying the signature requirement when included in a signature portion with an associated sighash single flag.

The application relates to the field of blockchain security, in particular to a data storage method for blockchain broadcast multi-signature based on quantum attack resistance, which comprises the following steps: constructing a multi-signature system; a signature organizer node constructs an intelligent contract and initiates data signature; the signature organizer uploads to-be-signed data, a signer node and an aggregated public key of all signature nodes to a blockchain; the to-be-signed information is unevenly divided according to the credit weight of the signer node, and the divided data is distributed to corresponding signer nodes for signature according to the node performance and the credit weight; the signer node returns the signed data to the intelligent contract, the intelligent contract verifies the returned information, and if the verification is successful, the signature result is stored, otherwise, the signature fails; the application can perform more secure multi-to-multi transaction signature, prevent quantum computers from reverse cracking the signature result, and guarantee the security and availability of the blockchain system.

Systems and methods for authorizing a blockchain transaction. A verification network receives a transaction request for the blockchain transaction from a payer device including a first signature generated by a first private key associated with a payer. The verification network broadcasts a verification request to verification system(s) which assess pre-agreed threshold parameters. If the parameter(s) are satisfied, at least one verification system perfects the transaction by generating a second signature using a second private key, and broadcasts the transaction to the blockchain network. If the parameter(s) are not satisfied, verification offer(s) from among the verification system(s) including the second signature(s) are used to prompt the payer device to confirm the blockchain transaction by selecting at least one of the offer(s). The verification network receives selected offer(s) from the payer device and broadcasts the transaction to the blockchain network, in accordance with the selected offer(s) and the transaction request.

Systems and procedures for quantifying, tracking, and settling differentiated energy attribute (DEA) tokens using a private blockchain network across the entire lifecycle of differentiated energy products derived from raw materials and synthesized products. Differentiated energy attributes are verified by a verification authority according to issuance standards as primary and derivative differentiated energy attribute tokens (DEATs) associated with differentiated energy from raw materials or a synthesized product. DEATs are published on a modified multi-signature wallet of the differentiated energy producer or synthesized product producer, governed by the terms and conditions of one or more smart contracts.DEATs can be settled in a bilateral transaction between a buyer and a seller via a transaction smart contract.

The invention provides a blockchain-based platform for secure management and sharing of research data. It integrates modules for smart contract execution, decentralized data marketplaces, dynamic consent management, cross-chain interoperability, and advanced security features, including post-quantum cryptography and multi-signature authentication. The platform ensures data integrity, transparency, and compliance with evolving privacy regulations by automating research agreements, incentivizing participation through tokenomics, and enabling seamless multi-party collaborations. A decentralized reputation scoring system and comprehensive version control enhance accountability and traceability of research activities. Additionally, the platform supports data anonymization and dynamic consent updates, safeguarding participant privacy while fostering collaborative research. By leveraging AI-driven analysis and decentralized governance through a DAO model, the invention optimizes research processes, facilitates efficient data exchange, and promotes ethical standards in research environments, offering a robust and innovative solution to the challenges of modern research data management.

The application discloses a cross-domain federated learning method based on a block chain, which uses a multi-signature technology to solve the effectiveness detection of a training model of each node in a federated learning process, uses two signature nodes 1 and 2 used for signature to respectively complete a learning digital signature and an expected digital signature. The signature node 2 is used for the learning digital signature of the node completing the training model, and the learning digital signature indicates that the node has completed learning. When the node completing the training model outputs a model, the output training model of the node is compared with an expected training model range, if the expected training model range is met, the signature node 2 performs the expected digital signature on the node, and the expected digital signature indicates that the output training model of the node meets the expected training model range; if the expected training model range is not met, the expected digital signature is not performed on the node.

The present disclosure generally relates to methods, systems, apparatuses, and non-transitory computer readable media for managing cryptocurrency. A cryptocurrency management system has a cryptocurrency management device (CMD), a mobile communication device (MCD), and a cryptocurrency management server (CMS) that are each configured to store a respective private key for use in generating a respective authenticating signature for a multi-signature address of a cryptocurrency network. Any two of the three authenticating signatures capable of being generated by the CMD, MCD, and CMS may be combined to generate a fully authenticated request for transferring cryptocurrency associated with the multi-signature address. The system provides the user with a flexible self-custody solution that permits him or her to transfer cryptocurrency without having to access the private key stored at the CMS. However, the CMS enables for recovery in the event of loss or unavailability of one or both of the CMD and / or the MCD.

The application discloses a kind of group-oriented multi-signature method, system, electronic device and storage medium, method includes: initialization θ group Gr i ; Private key is generated for each group member and administrator, and the public key of group is calculated and published;When signing, each group selects a member to participate in signature, whether the signature of this member is established is verified, if not established, stop this signature;If established, administrator sends R i , administrator public key mpk i To smart contract;After R i , administrator public key mpk i , smart contract is received, (R1, mpk1), …, (R θ , mpk θ ) are sent to each group administrator, and current time stamp t is recorded, T is calculated and sent to each group administrator;According to the signature public key of all group administrators, v i =H1 (L, mpk i ), L is mpk1, …, mpk θ List is constructed, and s i Is calculated;Group administrator sends the s i Calculated to smart contract;After receiving all s1, …, s θ , smart contract sends s1, …, s θ To each group administrator;The administrator of group Gr i Calculates s=s1+…+s θ (mod α), (s, p i，j , R' i，j , s' i，j ) is saved, and the final signature σ=(R, s) is output.

The invention discloses a transaction detection rule updating method and device and a computer storage medium, and relates to the field of block chains. The method comprises the steps that under the condition that it is detected that an oracle machine obtains an updating instruction about a transaction detection rule, or under the condition that it is detected that a block chain node corresponding to a supervision mechanism initiates a multi-signature proposal, rule updating information is generated, the oracle machine is used for connecting external data with the block chain node, and the block chain node is used for connecting the external data with the block chain node; the multi-signature proposal is a modification proposal about the transaction detection rule; calling an intelligent contract deployed in a block chain, the transaction detection rule being built in the intelligent contract; and updating the transaction detection rule built in the smart contract according to the generated rule updating information. The technical problems of compliance risk and low system efficiency caused by untimely rule updating and lack of flexibility in execution in a traditional transaction detection system are solved.

The invention relates to the technical field of data security, in particular to a property right digital certificate anti-counterfeiting verification method and system, and the method comprises the steps: generating a property right digital certificate according to the property right information submitted by a user, constructing a plurality of subtasks for a plurality of contents needing digital signature, and respectively transmitting the subtasks to different participants; determining a signature sequence when the participants perform parallel multiple signatures according to historical signature time of the participants so as to generate initial multiple signatures, and setting a key updating mechanism to regenerate new multiple digital signatures; and randomly verifying the generated multiple digital signatures for multiple times to check the validity of the property right digital certificate. The invention aims to improve the efficiency and reliability of anti-counterfeiting verification of the property right digital certificate.

Embodiments of the present application disclose a transaction processing method, device, equipment and medium, which can be applied to the field of blockchain technology. The method comprises: if the network connection state between a business terminal and a resource management server is a connection state, determining a first resource client as a resource client for participating in transaction signature based on a first business transaction signature policy in a target transaction signature policy; determining a first to-be-signed business transaction associated with a target contract address through the first resource client, performing transaction signature on the first to-be-signed business transaction through a first key fragment, and obtaining a first signature fragment; notifying N signature management devices to generate N remote signature management information associated with the first to-be-signed business transaction based on a multi-signature policy; and sending the first signature fragment and the first to-be-signed business transaction to the resource management server based on a threshold signature policy. The embodiments of the present application guarantee the security of digital resources on a target business contract.

A method is provided comprising generating a blockchain transaction (Tx) indicative of a condition on use of the resource, the blockchain transaction comprising a multi-signature script requiring a plurality of signatures for completion of the blockchain transaction; providing a first subset of the plurality of signatures to the blockchain transaction to generate a partially signed signature script to partially complete the blockchain transaction; and responsive to the condition on the use of the resource being satisfied, providing a second subset of the plurality of signatures to the blockchain transaction to fully complete the blockchain transaction. The condition on the use of the resource may be the use of a discrete amount of the resource and the second subset of the plurality of signatures is provided responsive to the discrete amount of the resource being used.

An information processing device capable of encrypting information using a legitimate private key corresponding to a public key stored in a storage device contributes to the easy management of information regarding the opening and closing of storage devices in a storage device by receiving opening and closing information from an electronic tag equipped with an electronic tag, encrypting the information, and storing it in the storage device. [Solution] The information processing method involves the first information processing device 200a receiving digital signature unique information from the electronic tag 100, and storing encrypted multisig unique information in the storage device 400 in association with the unique information. The second information processing device 200b receives the first encrypted information from the electronic tag 100, and when the multisig unique information corresponding to the decrypted information is stored in the storage device 400, it transmits the second encrypted information to the electronic tag 100. When it receives predetermined digital signature information from the electronic tag 100, it generates predetermined multisig information and stores it in the storage device 400.

The invention discloses a multi-signature verification method and device for a digital currency wallet, and relates to the technical field of risk management, and the method comprises the steps: initializing user information, generating a public key for each user in a user queue, and configuring a signature utility value according to the function level and the work attribute of each user; a multi-signature script is generated by using the public key, and a multi-signature address is generated according to the multi-signature script and used for receiving funds of the digital currency wallet; and generating a multi-signature verification strategy, and verifying the real-time transaction of the digital currency wallet according to the updated multi-signature verification strategy when detecting that the user queue changes. The technical problem that in the prior art, due to attribute change of a user, the safety and the flexibility of transaction verification through fixed multiple signatures are insufficient is solved, and the technical effects that the signature strategy is intelligently replaced according to the real condition of personnel flow, and the safety and the flexibility of multi-signature verification are improved are achieved.

The application provides a vulnerability protection method, device, equipment, medium and product. It belongs to the technical field of network security. The method comprises the following steps: obtaining a vulnerability detection report; uploading the vulnerability detection report to a block chain network, wherein the block chain network is deployed with a smart contract; obtaining at least one vulnerability repair task, wherein the vulnerability repair task comprises a difficulty level of vulnerability repair; determining a task execution end of the at least one vulnerability repair task according to the difficulty level, and issuing the corresponding vulnerability repair task to the task execution end; obtaining a vulnerability repair result returned by the task execution end; performing security detection on the vulnerability repair result according to a multi-signature mechanism of the block chain network and a preset rule of the smart contract; and determining that the vulnerability repair is completed in the case that the vulnerability repair result passes the security detection. The technical problems of low security of vulnerability information and low stability of the system caused by vulnerability repair in the related art are solved.

The invention relates to the technical field of information security, and discloses an electronic seal anti-counterfeiting identification method and system based on quantum random numbers. The method comprises the following steps: a quantum random number generator samples a quantum physical process to generate a true random number sequence and extracts a quantum random seed; analyzing the threat degree according to the signature historical mode, and distributing quantum random seeds according to the threat level to randomly select block chain signature nodes; the nodes are paired and bound according to a quantum association mode, and multiple signatures are randomly scheduled to execute time sequence elimination predictability; extracting a block chain state and binding the block chain state with a quantum random seed to generate a quantum anti-counterfeiting feature code; and during verification, the anti-counterfeiting feature code is extracted to execute quantum randomness verification, signature time sequence verification and block chain state verification to judge authenticity. According to the method, the problem of security vulnerabilities caused by predictability of the signature sequence in a block chain multi-signature electronic seal system is solved, and the security and reliability of anti-counterfeiting identification of the electronic seal are improved.