917 results about "Digital currency" patented technology

Embodiments of the present invention are directed to methods and systems for managing a cryptocurrency payment network comprising one or more issuer nodes and one or more distributor nodes. Issuer nodes may be granted different rights from distributor nodes with respect to the issuance and distribution of digital currency within the cryptocurrency payment network. A management system server computer may generate unique node verification key pairs for each node in the cryptocurrency payment network, where the node verification key pairs may be used to identify and authenticate issuer nodes and distributor nodes.

The invention discloses a user public key address binding, searching and verifying method and system based on the crypto currency open account book technology. The user public key address binding, searching and verifying method is characterized by comprising the following steps that (1) verification public key addresses are published to users in a crypto currency network; (2) an account name registration request of one user is received, and the public key address of the user is received; (3) crypto currency is sent to the public key address of the crypto currency of the registered user through a private key address corresponding to the verification public key address and used as a verification transaction, and it is set that additional information or script content of the verification transaction contains the account number of the user, wherein the amount of the crypto currency is greater than or equal to zero; (4) query requests from other users in the crypto currency network are received, and the public key address of the registered user is fed back according to the query requests. The user public key address binding, searching and verifying method and system can substantially improve the availability, convenience, safety and reliability of crypto currency transactions, and protect the users against economic losses caused by the situation that the public key addresses are tampered with and used illegally.

A method, system and program product comprise accessing a system having a digital currency infrastructure. At least three user addresses are created. Rules for filtering acceptable transactions on the system are prepared in form of recursion base and recursion steps. Items are initiated on the system according to the defined rules. The assets transaction data is transferred to the system wherein the system links asset data and the parties to the transaction according to the said rules.

A portable communication device is used in a digital money system so as to pay for purchase by digital money by using the portable communication device. A remote communication interface interfaces radio-frequency communication with a remote communication terminal. A short-distance communication interface interfaces wireless communication with a communication terminal located in the vicinity of the portable communication device. Data or instruction information is input to the portable communication terminal by an inputting unit such as a key panel. The data is stored in a memory and is displayed on a display unit such as an LCD. An enciphering and deciphering circuit enciphers or deciphers the data to be transmitted or received so as to maintain security.

In an example, a network device is configured to generate a first public-private key pair. The network device is configured to receive, over an electronic network, public keys of two or more second public-private key pairs. The network device is configured to generate a digital currency address using the public keys of the two or more second public-private key pairs and a public key of the first public-private key pair.

A platform for buyers and sellers of digital currency is disclosed. The platform comprises different modules which can be used alone or in combination. When used together, they provide for a fully automated experience for a user, from account sign-up through to funds settlement. Using the platform, a buyer or seller can participate in virtually instantaneous transactions of digital currency. The platform can be expanded to buy and sell other commodities in addition to digital currency. The platform can permit users to fund or settle accounts using commodities such as gold rather than a globally traded currency.

A method of conducting an offline virtual currency transaction is disclosed. The method may include steps of generating one or more virtual wallets; depositing certain amount of virtual currency in said virtual wallets; a payer transmitting at least a portion of said virtual currency to a payee through an offline platform; and payee confirming reception of the virtual currency. In one embodiment, the step of transmitting at least a portion of said virtual currency to another user through an offline platform may include a step of scanning a QR (Quick Response) code to transmit the virtual currency. In another embodiment, the virtual currency can also be transmitted through infrared. In a further embodiment, the step of confirming reception of the virtual currency may include a step of said payee deleting private key.

An integrated circuit may be provided with cryptocurrency mining capabilities. The integrated circuit may include control circuitry and a number of processing cores that complete a Secure Hash Algorithm 256 (SHA-256) function in parallel. Logic circuitry may be shared between multiple processing cores. Each processing core may perform sequential rounds of cryptographic hashing operations based on a hash input and message word inputs. The control circuitry may control the processing cores to complete the SHA-256 function over different search spaces. The shared logic circuitry may perform a subset of the sequential rounds for multiple processing cores. If desired, the shared logic circuitry may generate message word inputs for some of the sequential rounds across multiple processing cores. By sharing logic circuitry across cores, chip area consumption and power efficiency may be improved relative to scenarios where the cores are formed using only dedicated logic.

Cryptographic hashing circuitry such as mining circuitry used to mine digital currency may be formed on an integrated circuit. The hashing circuitry may include sequential rounds of register and logic circuitry that perform operations of a cryptographic protocol. A final hash output from the hashing circuitry may be checked using a difficulty comparison circuit to determine whether the hash output satisfies predetermined difficulty criteria. The difficulty comparison circuit may be configured as a hardwired comparison circuit having logic gates for checking only a subset of bits in the hash output. The comparison circuit may be adapted to change the number of bits that is checked based on a target number of bits for comparison set by the Bitcoin protocol. Candidate solutions found using the hardwired comparison circuit may then be fed to a host controller that checks the entire hash output to determine whether the candidate solution is valid.

The invention discloses an association and retrieval method and system used for public key addresses and user accounts of crypto-currency. The method includes the following steps that: 1, verified public key addresses are published for users in a crypto-currency network; 2, account registration requests of the users are received, and the public key addresses of the users are received, and corresponding relationships between the user accounts and the public key addresses are established; 3, private key addresses corresponding to the verified public key addresses are utilized to transmit crypto-currency of which the amount is larger than 0 to any other public key addresses, so that the crypto-currency can be adopted as verified transactions, and additional information or script content for setting the verified transactions contains check data; and 4, query requests of other users in the crypto-currency network are received, and the public key addresses of registered users are fed back according to the query requests. With the association and retrieval method and system of the invention adopted, the usability, convenience, safety and reliability of crypto-currency transactions can be greatly improved, and economic losses which are caused by situations in which the public key address of the users are tampered and posed by other people can be avoided.

The invention discloses a method and system for using digital currencies based on a block chain as well as a terminal. The method comprises the following steps: a digital currency client sends a request for applying a digital certificate to a block chain, and receives the corresponding customer information returned by the block chain after identity and request verification; a digital certificate application is sent to a security chip through a trusted execution environment according to the customer information; the security chip generates a key pair and a digital currency wallet address according to the customer information, and outputs the digital currency wallet address to the digital currency client through the trusted execution environment; the digital currency client sends the digital currency wallet address to the block chain to ensure that the block chain acquires the digital certificate from the authentication center according to the digital currency wallet address; and the digital currency client receives the digital certificate sent by the block chain, and sends a digital certificate installation request to the security chip through the trusted execution environment to ensure that the security chip is provided with the digital certificate. Thereby, the security of the block chain digital currency wallet can be increased through the security chip and the trusted execution environment.

Methods and systems for using blockchain digital currency are provided herein. The methods and systems comprise a blockchain digital currency that is created and utilized on a permission-based network of financial institutions. The blockchain digital currency is created by a central authority and minted into circulation by banks within the network, and is backed by reserves of real world currency of any country. The digital currency can be used for any type of financial transaction, and the system provides security, trust, traceability and a detailed audit trail for all transactions.

The invention discloses a multi-center block chain transaction privacy protection system and method. The system comprises an alliance control module, an amount verification module, a range verification module, an encryption module, a decryption module and a block chain system transaction module, wherein the alliance control module is used for generating alliance parameters by multiple participants; the amount verification module is used for verifying that input and output of an encrypted ciphertext amount in a transaction are equal; the range verification module is used for verifying that theencrypted ciphertext amount in the transaction is in a specific interval and is constantly positive; the encryption module and the decryption module are used for carrying out homomorphic encryption and decryption on the amount in transmission and reception processes; and the block chain system transaction module is used for complete bitcoin-like digital currency transaction systems, and has a complete transaction process which comprises transmission, reception, broadcasting and block confirmation. The system is capable of enhancing general structures through block chain transaction privacies under a multi-center supervision mode, so as to realize privacy protection for trapdoor parameters under joint control of multiple parties and transaction metadata in transaction process, and effectively strengthen the safety of plaintext amounts in multi-center block chain system transaction process.

The invention discloses a method for conducting digital currency transactions through block chain technology. The method is as follows: individual and enterprise users conduct digital currency transactions through decentralized block chain technology, and generate electronic account book information and various transaction vouchers after the transaction , all data records are stored on the nodes of the blockchain, and companies, legal agencies or public security organs retrieve information from any node to track and investigate the flow of funds, and store the information permanently.

The invention relates to a picture copyright protection method and a picture copyright protection system based on a blockchain technology. The picture copyright protection method includes that (1), a picture maker uploads a picture file to a server via an uploading client side; (2), the server calculates the Hash value of the picture file as a unique identification of the picture file, initiates a transaction to a digital currency network based on the blockchain technology, adds the Hash value as additional information to the transaction, and saves related information to a database; (3), a picture user downloads the picture file from the server via a downloading client side, initiates a transaction, adds the Hash value of the downloaded picture file as additional information to the transaction, and saves related information to the database. By the picture copyright protection method and the picture copyright protection system, copyrights of picture makers can be declared and protected when original pictures are released on the internet.

The invention discloses a digital currency-based electronic transaction method and system, and belongs to the field of digital currency. The method comprises the steps of receiving a payment request package comprising an e-commerce certificate, signature information, a transaction amount and an e-commerce public key address from an e-commerce server by a digital currency wallet, verifying the signature information by using the e-commerce certificate, obtaining corresponding transaction data, a transaction identifier and a digital currency private key when the verification is passed, performing signature on the transaction data and the e-commerce public key address by using the digital currency private key, organizing the transaction information according to a signature result, the transaction identifier and the corresponding digital currency public key, broadcasting the transaction information to a digital currency network, and sending a payment package organized according to the transaction information to the e-commerce server; and verifying the signature result in the payment package by the e-commerce server, and when the verification is passed, determining transaction completion or transaction closing according to whether verification passing information of the transaction information is found in the digital currency network or not. According to the method and the system provided by the invention, the electronic transaction efficiency is improved.

A secure method of maintaining and accessing files (for example, multimedia files) is provided. Each file is divided into fragments or slices and each slice is encrypted and stored on a separate node. Each node is also required to maintain an instance of a public block-chain (or distributed ledger) which holds conventional block-chain transaction information for managing payment for access to the files. Preferably, each node is also paid in digital currency both as a conventional block-chain miner for maintaining the public block-chain and also for maintaining the slices.

A system and method for the secure online storage of digital currency or crypto-currency assets, and the secure use of stored online digital currency assets for financial payment transactions and credit lending transactions in either digital currency or fiat currency. The present invention includes various methods for the encryption and secure online storage of a digital currency wallet using spliced/paired design architecture, and various methods for the integration of secure digital currency online wallets with online banking platforms, debit card devices, credit card devices, credit lending networks, merchant payment processors and credit card associations. The present invention also relates to the use of spliced/paired design architecture for non-financial applications that improve the online storage security of other types of data files and document files that are not related to digital currency or financial transactions.

A digital currency management method and a digital currency node apparatus for a digital currency network based on a block-chain are provided. The method includes: determining whether a transaction is generated, performing a proof-of-work mechanism if the transaction is generated. The method also includes: not performing the proof-of-work mechanism if no transaction is generated. In addition, the proof-of-work mechanism includes: obtaining a pre-block and calculating a pre-hash value of the pre-block; and finding a current verification value according to the pre-hash value. Accordingly, a newly generated transaction could be processed immediately and the waste of computing resource in the digital currency network could be reduced.

A method, system and program product comprise accessing a system having a digital currency infrastructure. At least one user address is created. Genetic and health related user data is prepared. The user data is transferred to the system wherein the system links the user data and the user address.

The invention provides a method for independently generating and storing an encrypted digital currency private key. The method includes the step of private key generation, wherein an intelligent device is adopted and the private key is generated from the intelligent device; the step of private key storage, wherein the private key is stored in the intelligent device and completely closed in the intelligent device and cannot be read from the outside; the step of private key use, wherein the intelligent device is provided with a communication interface in communication with an intelligent terminal having access to the Internet, and open information interaction is conducted on the intelligent device and the intelligent terminal through the communication interface. The private key is stripped out of a wallet and is separately sealed in the intelligent device, the intelligent device only displays a public key and electronic signature information to the outside, the possibility that the private key is stolen by any non-owner intention is eliminated, all paths to obtain the private key are cut off, and the currency right of a user is fully protected.

The invention discloses an asset cross-chain transaction method between block chains. Cross-chain asset exchange is realized through an asset two-way lock and a cross-chain contract verification transaction; The invention provides a decentralized point-to-point cross-chain transaction scheme. Transfer between the digital currency and the digital currency is realized between the public chain and the digital currency, transfer between the digital currency or the physical asset and the digital currency is realized between the alliance chain and the public chain, and exchange and transfer betweenthe physical asset and the physical asset are realized between the alliance chain and the alliance chain. Therefore, the cross-chain transaction method is suitable for various common block chain typesand realizes conversion and transaction of various assets.

The invention relates to digital currency wallet software and particularly relates to a lottery issuing method based on block chains. The lottery issue method based on block chains comprises steps: a lottery issuing user generates a lottery contact containing a lottery wallet address through using a generation module of a block chain digital wallet program; the lottery contract is written in the block chain as transaction data; the lottery contract is issued through operating the block chain digital wallet program; and a cashing module of the digital wallet program is utilized to perform cashing after placing a bet on the issued lottery contract. The lottery issuing method is based on the block chain technology. Any user having the block chain wallet can issue his own lottery; a lottery drawing result is operated based on an unknown block; any link involved in the lottery cannot be cheated; a source of a lottery drawing program is opened which is easy for users to supervise; and even a lottery issuer cannot predict or set the lottery drawing result. The lottery issuing method overcomes problems of traditional lottery centralization, lack of transparency and uncertainty.