30802 results about "Blockchain" patented technology

A computer system is provided that communicates with a distributed blockchain computing system that includes multiple computing nodes. The exchange stores an order book and a plurality of digital wallets associated with different clients. The computer system receives new data transaction requests that are added to the order book. A match is identified between data transaction requests and hashes associated with the digital wallets associated with the respective data transaction requests are generated. The counterparties receive the hashes of the other party along with information on the match and each party causes blockchain transactions to be added to the blockchain of the blockchain computing system. The computing system then monitors the blockchain to determine if both sides of the match has been added to the blockchain.

An electronic resource tracking and storage computer system is provided that communicates with a distributed blockchain computing system that includes multiple computing nodes. The system includes a storage system, a transceiver, and a processing system. The storage system includes an resource repository and transaction repository that stores submitted blockchain transactions. A new resource issuance request is received, and a new resource is added to the resource repository in response. A new blockchain transaction is generated and published to the blockchain. In correspondence with publishing to the blockchain, the transaction storage is updated with information that makes up the blockchain transaction and some information that was not included as part of the blockchain transaction. The transaction storage is updated when the blockchain is determined to have validated the previously submitted blockchain transaction.

The invention describes an identity management system (IDMS) based on the concept of peer-to-peer protocols and the public identities ledger. The system manages digital identities, which are digital objects that contain attributes used for the identification of persons and other entities in an IT system and for making identity claims. The identity objects are encoded and cryptographically encapsulated. Identity management protocols include the creation of identities, the validation of their binding to real-world entities, and their secure and reliable storage, protection, distribution, verification, updates, and use. The identities are included in a specially constructed global, distributed, append-only public identities ledger. They are forward- and backward-linked using the mechanism of digital signatures. The linking of objects and their chaining in the ledger is based on and reflect their mutual validation relationships. The identities of individual members are organized in the form of linked structures called the personal identities chains. Identities of groups of users that validated identities of other users in a group are organized in community identities chains. The ledger and its chains support accurate and reliable validation of identities by other members of the system and by application services providers without the assistance of third parties. The ledger designed in this invention may be either permissioned or unpermissioned. Permissioned ledgers have special entities, called BIX Security Policy Providers, which validate the binding of digital identities to real-world entities based on the rules of a given security policy. In unpermissioned ledgers, community members mutually validate their identities. The identity management system provides security, privacy, and anonymity for digital identities and satisfies the requirements for decentralized, anonymous identities management systems.

The present invention generally relates to blockchain technology. Specifically, this invention relates to creating a blockchain called a slidechain that allows for multiple valid branches or forks to propagate simultaneously with a customized set of protocol rules embedded in and applied to each fork chain that branches from another chain. The invention generally provides a computer-implemented method for accessing, developing and maintaining a decentralized database through a peer-to-peer network, to preserve the original state of data inputs while adapting to changing circumstances, user preferences, and emerging technological capabilities.

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

The present invention generally relates to blockchain technology. Specifically, this invention relates to adapting blockchain technology for the storage of voting data in an electronic voting system. The system includes a distributed network of voting machines in communication with each other. Each voting machine has a barcode scanner, a network communications device and a computer system running a voting client. Votes are received through the barcode scanner or a voter interface system and stored securely on a blockchain. The tally for various candidates in the election is updated and stored as each vote is received and counted. This creates an auditable trail of votes and the tally which can be used to detect, correct, and prevent fraud and error in the vote counting process.

The present invention relates to a digital asset transaction platform, comprising an asset entry device and a distributed accounting network. An asset is validated by the asset entry device. When compliance is achieved, asset project information is generated and is input to the asset transaction platform, wherein the asset project information includes a hash value of a digital asset certificate of the asset. The distributed accounting network comprises a plurality of accounting nodes, which are connected in a point-to-point manner and each store a transaction data information general ledger which is synchronized with each other and is based on a block chain database. The asset transaction platform supports mutual transaction of at least two different types of assets. The asset transaction platform provided by the invention adopts the block chain technology and the digital identity identification technology of assets and realizes de-centralization and trusted quick transaction of various assets.

A computer system that interfaces with a blockchain is provided. The computer system receives match data for a match between a first data transaction request that is associated with a first identifier and a second data transaction request that is associated with a second identifier. A first blockchain transaction is generated based on the match data and stored to a blockchain. At least one further blockchain transaction is generates that splits the match into two different transactions—one between the first identifier and an intermediary and the second between the intermediary. These are recorded to the blockchain via the further blockchain transactions.

An out-of-band Domain Name System (DNS) security technique uses a cryptographic blockchain for securing and validating DNS data in a chain of custody that exists outside the DNS namespace, allowing validated access to cached DNS information without requiring real-time access to root servers.

The invention discloses a blockchain-based evidence preservation method, which is applied to a network system with master nodes and slave nodes, including: each slave node performs identity verification to the master node, and assigns a pair of secret keys to the slave nodes that pass the identity verification. key, and write the registration information of the slave node into the blockchain; after the master node responds to the corresponding slave node with the evidence upload request received, the slave node signs the electronic evidence to be uploaded with the corresponding private key and sends To the master node; according to the registration information of each slave node in the blockchain, verify the legitimacy of the slave node and the authenticity of the signature of the corresponding electronic evidence, store the verified electronic evidence to the cloud storage server and generate the corresponding digital fingerprint, Write the generated digital fingerprint into the blockchain along with the corresponding timestamp. The evidence preservation method of the present invention has strong real-time performance, can save a lot of time, and does not require the participation of a third-party notary organization, thereby saving social resources.

The present invention relates to identity construction and verification on the Internet, and provides a block chain identity construction and verification method. The method comprises the following steps: a certificate authority constructs a user identity block chain according to an identity verification request submitted by a user; and the certificate authority performs user identity verification processing by means of the identity block chain. According to the method provided by the present invention, user identity information is written into the block chain, and multiple certificate authorities jointly complete confirmation and storage of the identity information by means of an agreement mechanism, and then the user can conveniently perform identity verification by using the block chain. The method is not only capable of improving efficiency of user identity verification, but also will not affect accuracy of the user identity information due to the problem of an individual certificate authority, thereby greatly improving security of an identity verification process.

A virtualized blockchain forest includes a plurality of individual blockchains. Each individual blockchain of the plurality includes a blockchain height, a genesis block, and at least one additional block. The virtualized blockchain forest further includes a plurality of participating processors that make up a consensus pool, and a blockchain forest height having a time-sequenced start-to-finish length of blocks among the collective plurality of individual blockchains. The virtualized blockchain forest is configured to aggregate different ones of the plurality of individual blockchains, and is further configured to terminate individual ones of plurality of individual blockchains.

A blockchain configured device-driven disintermediated distributed system for facilitating multi-faceted communication over a network. The system includes entities connected with a communications network. Each of the entities and associated devices and sensors and networks serve as a source of data records. The system includes a blockchain configured data bank accessible by each of the plurality of entities based on rules and preferences of the entities upon authorization by the blockchain configured data bank. The blockchain configured data bank includes a processing component for executing stored instructions to process the data records of the entities over the communications network. The system includes a blockchain configured component communicatively coupled to the blockchain configured data bank and adapted to be accessible by each of the plurality of entities. The system includes a validation device including a facial expression-based validation device and a geo-tagging-based validation device.

The invention discloses a block chain network, a branch node and a block chain network application method. The block chain network comprises a plurality of nodes used for separately storing blocks comprising recorded data and linking the blocks to form a block chain; the plurality of nodes comprise at least one branch node used for: when recorded data submitted by a specific user are received, sending the recorded data to other nodes in the block chain network, and returning a recorded data submission result to the specific user according to the number of effective confirmation results returned by other nodes for the recorded data; and the branch node is further used for: when a request of creating a new block of the specific user is received, sending the new block to the other nodes in the block chain network, and returning a result of creating the new block to the specific user according to verification results of the other nodes to the new block. By implementation of the block chain network disclosed by the invention, the implementation of the block chain technology on a mobile terminal of a user side is achieved, the application range of the block chain is expanded, and the resources of the mobile terminal of the user side can be saved.

A system and method for transaction bitcoin is described. Bitcoin can be sent to an email address. No miner's fee is paid by a host computer system. Hot wallet functionality is provided that transfers values of some Bitcoin addresses to a vault for purposes of security. A private key of a Bitcoin address of the vault is split and distributed to keep the vault secure. Instant exchange allows for merchants and customers to lock in a local currency price. A vault has multiple email addresses to authorize a transfer of bitcoin out of the vault. User can opt to have private keys stored in locations that are under their control. A tip button rewards content creators for their efforts. A bitcoin exchange allows for users to set prices that they are willing to sell or buy bitcoin and execute such trades.

A system, method, and computer readable storage medium for accessing a data file shared by all computing nodes participating in a system based on a blockchain protocol. The data file includes transactions and blocks. The transactions are data to be stored in the blockchain and the blocks are records that confirm when and in what sequence certain transaction became journaled as part of the blockchain. A request is received to include a plurality of transactions each with additional data as a new block on the blockchain. Criteria that includes a settable period of time or a settable number of transactions received is used to determine how many transactions go into a new block. A directed acyclic graph (DAG) is accessed that is constructed based on inter-dependencies among the transactions. The transactions for the new block are divided into a set of two or more independent tasks that can be executed in parallel based on the DAG. The independent tasks that can be managed independently are executed.

The invention discloses a blockchain data processing method, device and system. The blockchain data processing method comprises that a first node identifies whether received block information needs privacy protection processing; if the received block information needs privacy protection processing, a secret key of a plaintext encryption algorithm is generated, the block information is encrypted by means of the plaintext encryption algorithm employing the secret key, and encrypted block information is generated; the secret key is encrypted in a stipulated way, a secret key ciphertext is generated, the stipulated way comprises an algorithm through which a second node associated with the first node in the first node and the blockchain encrypts and decrypts the secret key ciphertext according to a preset mode; and data including the encrypted block information and the secret key ciphertext is stored a corresponding block of the blockchain as blockchain data. According to each embodiment of the invention, information data stored in the blockchain can be encrypted, so that only specific members can decrypt and check the information data, and the aim of carrying out privacy protection on special transaction information is achieved.

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

Embodiments of the present invention provide a system for utilizing one or more decentralized applications to allow entities to interface with a blockchain for the purposes of conducting a resource transfer. Typically, the blockchain is a permissioned blockchain which may be accessed only by the entities involved in the resource transfer. The decentralized applications may communicate with the legacy systems within each entity through an application programming interface (API) such that the data stored on the legacy systems may be governed by the blockchain. This ensures the authenticity of the data stored on the legacy systems while preventing the possibility of disparate versions of data being created over time.

In asynchronous public network, synchronous leaderless Byzantine consensus protocol operating with guaranteed safety and time-bound termination of individual protocol rounds is enabled with nodes having clustered architecture and highly available data transactions, and implemented with algorithm that defuses the effect of stop-faulty processes and bypasses the partitioned network links. Utilizing the time-bound consensus, a protocol and architecture for cross-chain transactions accomplish safe interoperability across blockchain networks. Multiple cross-chain transacting networks interconnected in a federation overcome the limitations of blockchain networks with monolithic ledgers in regard to transaction latency, scalability of throughput, volume of managed data, and openness for further interoperability.

The embodiment of the invention discloses an electronic-medical-record sharing system based on a block chain. The electronic-medical-record sharing system comprises an identity verification module, a processing module and a querying module, wherein the identity verification module is used for receiving a logging-in account input by a user, identifying the logging-in account and configuring corresponding operating authorization for the logging-in account; the processing module is used for being connected with a pre-established block-chain database, wherein the block-chain database comprises a plurality of nodes, and each node corresponds to a hospital database; the querying module is used for receiving a querying order input by the user, obtaining a corresponding electronic medical record from the block-chain database according to the querying order and showing the obtained electronic medical record to the user. The electronic-medical-record sharing system is established based on the block chain technology in the embodiment, all data can be only preserved in a hospital server generated through original data, only data hash values are stored on the block-chain database so that the aims that data cannot be tampered, is looked up in a classified mode and is retrospective in consulting can be achieved, and the electronic-medical-record sharing system has the advantage that the data security is improved.

An embodiment of a method of providing identity services includes: receiving identity data for an individual for which the identity provider has provided an identity; generating a transaction to store an identifier representing the identity data in a data structure on a blockchain of a distributed system; sending the transaction to at least one node of the distributed system; and generating an identity token incorporating the identifier representing the identity data. An embodiment of a method of verifying an identity includes: receiving data extracted from the identity token, wherein the extracted data includes an identifier representing the identity data; determining whether a data structure containing the extracted identifier representing the identity data is stored on a blockchain of a distributed system; and outputting an indication of a validity of an identity associated with the identity data based on the determination.

The invention discloses an asset transaction method and a system. The method comprises steps that an acquired first transaction request is signed by a consignment agency, the first transaction request after signature is sent to the block chain network established on the basis of the P2P network, the first transaction response data is constructed by an issuing mechanism on the basis of the first transaction request acquired from the block chain network, the first transaction response data is sent to the block chain network so that validity of the first transaction response data can be confirmed by a block chain node on the block chain network responsible for accounting, the first effective transaction response data is written in a block chain data block, the block chain data block is acquired by the consignment agency through the block chain network, and asset transaction with the issuing mechanism and the consignment agency is accomplished. Through the method, transaction steps between the issuing mechanism and the consignment agency can be reduced in a transaction process, risks of being tampered of the data can be reduced, asset transaction confirmation cost is reduced, and operation cost of the block chain network is further reduced.