5760 results about "Smart contract" patented technology

The present invention relates to a securities trading system that utilizes a distributed blockchain ledger to conduct security transactions. Users are provided with cryptographic wallets that enable the users to access a peer-to-peer network of computing nodes on which the distributed blockchain ledger is managed. The securities made available through the network may be stored directly on the blockchain ledger itself. Smart contracts may be utilized to transfer the securities among the users and to verify that all transactions are in compliance with applicable regulatory rules and other restrictions.

A system and methods for managing intellectual property using a blockchain are provided which may include one or more elements which forms a comprehensive foundation for an eco-system for innovation and intellectual property management. The elements may include: an intellectual property distributed ledger, an intellectual property digital policy server, non-binary trust models, automatic ontology induction, modifications to the blockchain “mining” and “proof of work” system, appstore for related applications, partial transparency transactionalized search engine, persistent and encapsulated software trust objects, licensing royalty smart contract with auditable payment tracking, micro-equity incentives, automated fraud detection intellectual property management dashboards, innovation workflow broker, innovation optimization tools, disruption mapping, and intelligent just-in-time learning. The system combines and integrates these functions to enable personal, intra-enterprise, inter-enterprise and extra-enterprise recordation, collaboration, searchability and its benefits, licensing and tracking of information regarding intellectual property over a networked distributed computing system.

The invention provides a method and system for privacy protection of block chain transaction. The method comprises: a transaction group is established between nodes of a block chain system, a user establishes an account at a node, and the node generates public and private key information of the account and then joining of a group is carried out; a transaction request node encrypts transaction information by using a broadcast encryption algorithm, carries out group signature processing on the encrypted transaction information, and then broadcasts the transaction information after broadcast encryption and group signature processing; a common non-account-recording node verifies the transaction information and then broadcasts the transaction information, an account-recording node decrypts thetransaction information and performs an intelligent contract to carry out account recording, broadcast encryption is carried out and then the information is recorded into a public account book, wherein the stored data are only allowed to be opened by the account-recording node, the transaction request node and an administration node. With the broadcast encryption algorithm and group signature technology, a privacy protection problem in the block chain system is solved and the traceability of the transaction is ensured.

Blockchain-based, smart contract platforms have great promise to remove trust and add transparency to distributed applications. However, this benefit often comes at the cost of greatly reduced privacy. Techniques for implementing a privacy-preserving smart contract is described. The system can keep accounts private while not losing functionality and with only a limited performance overhead. This is achieved by building a confidential and anonymous token on top of a cryptocurrency. Multiple complex applications can also be built using the smart contract system.

The invention discloses a smart contract protection system based on a trusted environment, including a client, block chain nodes, a data provider, a trusted environment, a non-trusted environment, a smart contract information processing module (A), a block chain node information transmission module (B) (such as a node interaction interface in the Ethereum), an input data transmission module (C), a smart contract execution module (D), a local contract information storage pool (E) and a block chain smart contract storage pool (F). The client is in communication connection with the block chain nodes. The data provider is in communication connection with the block chain nodes. The block chain nodes are in communication connection with one another. The technical problem that the copyright of smart contracts cannot be protected and the rights and interests of smart contract users are damaged due to the fact that the information of smart contracts may easily leak in the existing smart contract system and the technical problem that data may be stolen due to data leakage are solved.

A method for creating an asset-backed distributed ledger token representing a smart contract, the token being backed by a pledge of an illiquid form of a precursor or means of production of a commodity asset, comprising receiving a pledge of unrefined or pre-commodity asset, digitizing the unrefined commodity asset into fractional representations of the commodity asset using smart contracts on a distributed ledger network, and allowing account holders access to the perform transactions on the distributed ledger network to trade the fractional representations under the terms of the smart contract.

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 data sharing exchange system and method based on a block chain. The system comprises a data sharing exchange center, a front-end system and a block chain basic platform. Thedata sharing exchange center comprises a data sharing exchange control system, a data resource center and a client; The front-end system comprises a data acquisition system, a shared exchange module and a feedback module; The block chain basic platform comprises an alliance chain module and a data sharing exchange management module, the alliance chain module is responsible for intelligent contractand verifying credibility configuration of nodes, the intelligent contract generated in the data sharing exchange process is verified, and the data sharing exchange center communicates with the front-end systems in an alliance chain mode. According to the invention, the credit problem and the incentive problem of data sharing exchange in a multi-party participation environment are solved, the security and the reliability are ensured, the enthusiasm of a user for publishing and updating the sharing exchange data is promoted, and meanwhile, the guiding effect on user decision can be realized.

A method of issuing blockchain-based digital certificates comprising receiving from a user hashed user identification information and object information, recording to a digital certificate smart contract deployed at a digital certificate smart contract address on a blockchain network the hashed user identification information and object information and a timestamp of when the hashed user identification information and the object information were received, defined as a received timestamp, signing the digital certificate smart contract with an issuer signature, performing a user identity verification process to confirm a user identity, upon confirming the user identity, generating a combination certificate configured to be shared by the user to verify the user's ownership of an object associated with the object information, and sending the combination certificate to the user.

The invention relates to a Raft-algorithm-based block chain consensus mechanism. The mechanism comprises: consensus node information of a block chain is stored into the block chain and an initial state of a consensus node is set to be a follower state; on the basis of a Raft algorithm, a consensus node of an initial leader state is selected by combining the height of the block, wherein the consensus node of the leader state is used for recording a transaction event and generating a new block; and at the end of the term of the consensus node of the leader state, a consensus node of a leader state is selected again. Because the height of the synchronous block is considered for reference during the consensus node selection process of the leader state, the consensus efficiency can be improved and the transaction confirmation time can be shortened; and because the consensus node is selected again at the end of the term, the system fault tolerance can be improved. Moreover, on the basis of uniqueness of the consensus node selection of the leader state, each block has final consistency, thereby avoiding block chain furcation. Meanwhile, dynamic entrance and exit of a consensus node can be realized based on a management mechanism of the consensus node by an intelligent contract.

An Internet of Thing (IoT) device includes a camera coupled to a processor; and a wireless transceiver coupled to the processor. Blockchain smart contracts can be used with the device to facilitate secure operation.

The invention provides an intelligent contract implementation method. The intelligent contract implementation method includes the steps that an intelligent contract is established, the contract C is a triad group, C= (I, M<*>, {M1, M2, ..., Mm}), the contract comprises contract party information I and a set of contract state machines M* and contract state execution machines {M1, M2, ..., Mm}, wherein Ii represents information of the i contract party Pi, i=1 ...m, and m contract parties participate in the contract; states and events of all contract parties are input and stored in a database which is high in safety; the intelligent contract is executed, and the execution result of the contract is obtained. The invention further provides an intelligent contract system based on a block chain, and the system comprises a user interface, an intelligent contract device and a block chain management module.

System and method for executing cryptographically secure transactions in a network comprising a public ledger, comprising associating a first proposed transaction with a public keys smart contract and associating at least a second transaction including private data and public data in said network with a cryptographically secure transaction.

The invention discloses an electronic medical record storage and sharing model and method based on the blockchains and solves problems of patient's rights of access to personal medical data and insecure storage and sharing of sensitive medical data in the prior art. The model is characterized by comprising data creators, data owners, cloud storage, federated blockchains and data consumers, whereinthe blockchain is a control center. The method comprises steps that system initialization is performed; medical data are acquired, and data storage with intercepted signatures is employed; data publishing with the improved DPOS consensus mechanism is employed; data sharing based on smart contracts is performed. The method is advantaged in that security, reliability, privacy protection and securestorage are achieved, in combination with the cloud storage technology and the interceptable signature technology, in the federated blockchains, users can set sharing conditions through the smart contracts, safe and effective data sharing and access can be realized, and strong practicality is achieved.

The Point-to-Point Transaction Guidance Apparatuses, Methods and Systems (“SOCOACT”) transforms smart contract request, crypto currency deposit request, crypto collateral deposit request, crypto currency transfer request, crypto collateral transfer request inputs via SOCOACT components into transaction confirmation outputs. Also, SOCOACT transforms virtual wallet address inputs via SOCOACT (e.g., P2PTG) components into transaction confirmation outputs. In one embodiment, the SOCOACT includes a point-to-point payment guidance apparatus, comprising, a memory and processor disposed in communication with the memory, and configured to issue a plurality of processing instructions from the component collection stored in the memory, to: obtain a target wallet identifier registration at a beacon. The SOCOACT then may register the target wallet identifier with the beacon and obtain a unique wallet identifier from a migrant wallet source associated with a user at the beacon. The SOCOACT may then obtain a target transaction request at the beacon from the migrant wallet source and commit the target transaction request for the amount specified in the target transaction request to a distributed block chain database configured to propagate the target transaction request across a distributed block chain database network for payment targeted to the target wallet identifier registered at the beacon.

A single sign-on system using blockchain is disclosed. The single sign-on system may interconnect various organization systems over a peer-to-peer network, with each organization system having a blockchain node and an application programming interface (API). The blockchain node invokes and uses a smart contract to write registration credentials to the blockchain during a registration process. During a login process, the blockchain node invokes the smart contract to determine whether login credentials match stored login credentials in the blockchain. In response to matching login credentials, the API may generate a single sign-on token that can be used by a user device to access one or more organization systems connected over the network.

Provided is a process that includes: determining whether to execute a software asset based on trust records documenting provenance of the software asset published to a blockchain, wherein determining whether to trust the software asset comprises: accessing the trust record, verifying the trust record has not been tampered with subsequent to publishing, verify that a hash digest based on the software asset matches a hash digest associated with the trust record and published to the blockchain; verifying that trust assertions of the trust record are cryptographically signed by trusted entities specified by entity criteria, and verifying that the trust assertions satisfy execution criteria.

The invention discloses a construction equipment Internet of Things system and method based on the blockchain technology. The system comprises a plurality of Internet of Things nodes, a plurality of blockchain nodes, a plurality of intelligent terminals and a plurality of user terminals, the detection of various environmental information in the building and the monitoring of electrical equipment can be achieved, data are stored in the blockchain nodes in a distributed manner, a data transmission process is encrypted by using the asymmetric encryption technology, and data sharing is performed through a smart contract. According to the construction equipment Internet of Things system and method disclosed by the invention, the blockchain technology is combined with the Internet of Things technology, the consensus mechanism, distributed storage, asymmetric encryption and smart contract of the blockchain technology are applied to the Internet of Things, and many problems faced by the current Internet of Things are solved.

The invention discloses an electronic invoice management system and a method based on distributed accounting. The system comprises multiple verification nodes. Each verification node comprises an electronic invoice contract module and an agreement module, wherein the electronic invoice contract module comprises an electronic invoice service intelligent contract and is configured to be used for receiving a transaction command of the electronic invoice service intelligent contract and executing the transaction command according to a result of the agreement module so as to establish a block and form a block link, and the electronic invoice service intelligent contract is operation performed on an electronic invoice. The agreement module is configured to be used for communicating with other verification nodes when being triggered and making an agreement on a transaction command sequence between all verification nodes for the received transaction command according to an agreement algorithm. According to the invention, tamper-proofing is realized and the system and the method are cost-effective.

The Collateral Management with Blockchain and Smart Contracts Apparatuses, Methods and Systems (“CMBSC”) transforms borrow transaction request inputs via CMBSC components into borrow transaction init notification, borrow transaction sync notification outputs. A borrow transaction request associated with a borrow transaction is obtained. Transaction attributes associated with the borrow transaction are stored in a database. The transaction process optimizer component is notified regarding the borrow transaction. A blockchain sync notification associated with the borrow transaction is obtained from the transaction process optimizer component. The stored transaction attributes associated with the borrow transaction are filtered. A smart contract associated with the borrow transaction is generated. The generated smart contract is sent to a blockchain node of a blockchain network. A smart contract notification associated with the smart contract is received. A push notification regarding the smart contract notification is provided to a user interface component of a user's client.