Abstract: Linking a consumption history of media to a consumer, including: creating a profile of the consumer using a blockchain-based media ledger; enabling the consumer to subscribe to advertisement networks; recording at least one of consumptions of the media and transactions by the consumer as a media consumption history on a content catalog of a digital right management (DRM); and ingesting the media consumption history into the blockchain-based media ledger from the content catalog of the DRM. Keywords include blockchain, advertising, cryptographic tokens, and DRM.

Abstract: A method for accelerating execution of application in a trusted execution environment includes generating a tag based on computer instructions associated with a function of an application and input data, for representation of a computation to be performed by the application; determining whether the tag correspond to an entry in a database having one or more entries of tag and one or more corresponding computation result; and retrieving a corresponding computation result from the database without performing the computation if a corresponding entry of the tag is found in the database.

Abstract: To order to enable to improve accuracy of sensing information after being shared and to improve efficiency of control based on the sensing information when there is a possibility of loss of sensing information from another device, the information sharing device acquires a sensing result of an own device, transmits integrated information obtained by integrating information related to the sensing result of the own device and the another device stored in an integrated information storage means, receives the integrated information of the another device that is communicable, and causes the integrated information storage means to store the integrated information that is new obtained by integrating the integrated information stored in the integrated information storage means of the own device, the sensing result of the own device, and the integrated information of the another device.

Abstract: A variable-step authentication system and a method for operating for performing variable-step authentication for communications in a controlled environment is disclosed. The variable-step authentication system may include a communication device and a server. The variable-step method includes steps for determining an authentication process that involves a number of authentication steps. The number of authentication steps is variable and dependent on a trust level associated with each participant in the communication.

Abstract: A blockchain node receives transaction data and formatted information corresponding to the transaction data. The blockchain node determines, based on a transaction type corresponding to the transaction data and a predetermined relationship between the transaction type and a processing policy, a processing policy corresponding to the transaction data, where the processing policy includes a data attribute used for conversion and a conversion rule corresponding to the data attribute. The blockchain node converts the formatted information into an attribute value based on the conversion rule. A data attribute corresponding to the attribute value is determined. The blockchain node verifies received transaction data based on the attribute value of the data attribute and the attribute value of the data attribute.

Abstract: A method of creating, redeeming and transferring tokens associated with tokens on a peer-to-peer distributed ledger. The method includes including metadata associated with the token in a redeem script, wherein the redeem script is associated with a transaction of cryptocurrency on the peer-to-peer distributed ledger. One aspect of the invention provides a method of issuing and/or transferring a token, comprising the steps of generating a blockchain transaction (Tx) having an output (TxO) related to a quantity of cryptocurrency such as Bitcoin, and a hash of a redeem script. The redeem script comprises metadata which in turn comprises a token. The token is a representation of, or a reference to, a tokenised entity. The redeem script also comprises at least one (preferably two or more) public cryptographic keys. The metadata is provided in the redeem script at a location which is designated in the underlying blockchain protocol as a location for a cryptographic key.

Abstract: A device with key attestation features comprises an operating system stored in its memory, the operating system comprising a secure environment including a trusted application, and two or more device certificates, each associated with a device key pair, stored in the memory of the device. The trusted application is configured to handle key pair generation requests and key pair attestation requests to read an indication of a preferred device certificate. An attestation certificate that is generated in response to the key pair attestation request is then signed using one of the two or more device certificates with its associated device key pair based on the indication of a preferred device certificate.

Abstract: Systems and method for verifying an identity of a user during interaction with a resource provider are disclosed. Embodiments enable using an authorization request message to inquire about an identity attribute (e.g. age) of a user during an interaction between the user and a resource provider. An authorizing entity (e.g. issuer) or a processing entity provides an answer to the inquiry within an authorization response message. The answer to the inquiry may establish whether the consumer meets a threshold (e.g. minimum age requirement).

Abstract: An improved decentralized, blockchain-driven network for artificial intelligence (AI)-enabled skills exchange between Intelligent Personal Assistants (IPAs) in a network is disclosed that is configured to perform computational tasks or services (also referred to herein as “skills”) in an optimally-efficient fashion. In some embodiments, this may comprise a first IPA paying an agreed cost to a second IPA to perform a particular skill in a more optimally-efficient fashion. In some embodiments, a skills registry is published, comprising benchmark analyses and costs for the skills offered by the various nodes on the skills exchange network. In other embodiments, a transaction ledger is maintained that provides a record of all transactions performed across the network in a tamper-proof and auditable fashion, e.g., via the use of blockchain technology. Over time, the AI-enabled nodes in the system may learn to scale, replicate, and transact with each other in an optimized—and fully autonomous—fashion.

Abstract: In a method of validating a customer in an electronic transaction, an electronic interface of a vendor requests a first set of personal information to validate a customer. The first set of personal information is requested as a portion of a transaction between the electronic interface and a customer device used by the customer. Responsive to the customer's authorization, the electronic interface receives from the customer device an encrypted token which includes a second set of personal information which identifies the customer and encompasses at least a portion of the first set of personal information. The encrypted token is provided to the customer device from a third-party via an application on the customer device and is configured with the second set of personal information prior to the transaction. The electronic interface completes the transaction using the second set of personal information decrypted from the encrypted token to validate the customer.

Abstract: An example operation may include one or more of receiving a unique identifier and a security value from an object, retrieving a previously stored security value of the object from a database based on the received unique identifier, determining that the object is verified based on the received security value and the previously stored security value, and modifying the previously stored security value to generate a modified security value and transmitting the modified security value to the database.

Abstract: Provided is a system and method for verifying a blockchain using an external audit chain. The system may include an engine which facilitates communication between two or more independent blockchains. In one example, the method may include reading block data of a source data block that is stored among a hash-linked chain of data blocks on a blockchain, verifying a hash of the source block based on the block data that is read, generating a token based on the hash verification of the source block and storing the generated token in a verification block among the hash-linked chain of blocks on the blockchain to create a verification point on the blockchain, and storing a copy of the generated token in a block among a hash-linked chain of blocks on an audit blockchain that is independent from the blockchain.

Abstract: A system, method, and computer program product for authenticating a user for a transaction; generate an electronic wallet key pair including an electronic wallet public key and a corresponding electronic wallet secret key, the electronic wallet key pair associated with an electronic wallet transaction processing system; receive a payment gateway public key corresponding to a payment gateway secret key, the payment gateway public key and the payment gateway secret key associated with a payment gateway system; generate a public re-encryption key based on the payment gateway public key; communicate, to the payment gateway system, the public re-encryption key; receive or determine encrypted transaction data associated with a transaction, the encrypted transaction data including an account identifier encrypted with the electronic wallet public key; re-encrypt the encrypted transaction data with the public re-encryption key; and communicate, to the payment gateway system, the re-encrypted transaction data.

Abstract: An example operation may include one or more of sending, by a node A, a signed transaction TrA to a node B to update a token TKNA on a ledger of a blockchain A, submitting, by the node A, the TrA signed by the node B to the blockchain A, receiving from the node B a signed transaction TrB to create a token TKNB on a ledger of a blockchain B, sending the TrB signed by the node A to the node B to be submitted to the blockchain B, and activating, by the node A, the TrA to update the TKNA by submission of a secret value (x) signed by a private key of the node A to the blockchain A and by submission of a secret value (x) to the blockchain B to activate TKNB.

Abstract: A parent cryptographic key associated with a blockchain object is obtained. A number of parties (N) to share control over the blockchain object is obtained. N child cryptographic keys are generated based on the parent cryptographic key by applying a predetermined algorithm to the parent cryptographic key, wherein N is an integer greater than or equal to 2, and wherein the N child cryptographic keys are collectively configured to enable reconstruction of the parent cryptographic key.

Abstract: An information display method, a storage medium, and an electronic device are provided. The method includes: obtaining, by a terminal, resource transfer information used for transferring a resource; splitting, by the terminal, the resource transfer information into multiple pieces of resource transfer sub information; and displaying, by the terminal, a dynamic screen for indicating the resource transfer sub information. A quantity of pieces of the resource transfer sub information indicated on the dynamic screen at one moment is less than a total quantity of the multiple pieces of resource transfer sub information.

Abstract: Transaction cards, systems and methods for performing fraud detection at POS devices based on analysis of feature sets are disclosed. In one embodiment, an exemplary transaction card may comprise one or more sensors configured to collect pre-card-use sensor data regarding a user of the card, circuitry that assembles such data into feature sets and performs fraud detection, and data storage. According to some aspects, the fraud detection may include comparing user specific sensor data, collected for a current transaction, to a user-specific risk profile validation model to determine a risk score for the current transaction, and transmitting the risk score to a card transacting device when a card is presented during a transaction. In some implementations, the risk score may enable the card transacting device to evaluate a risk associated with accepting the transaction card to complete the attempted transaction.

Abstract: The invention presents a solution in which blockchain Transactions are created to implement the functionality of a logic gate. The invention may be implemented on the Bitcoin platform or an alternative blockchain platform. The transaction includes a locking script which comprises instructions selected so as to implement the functionality of a logic gate such as OR, AND, XOR, NOT and so on. In some examples, the instructions may be provided in a hashed form. When the script is executed (because a second transaction is attempting to spend the output associated with the locking script) the inputs will be processed by the conditional instructions to provide an output of TRUE or FALSE. The second transaction is transmitted to the blockchain network for validation and, if determined to be valid, it will be written to the blockchain. Validation of the second transaction can be interpreted as a TRUE output. Thus, the locking script of the first transaction provides the functionality of the desired logic gate.

Abstract: A configuration capable of recording MMT format data on a medium as BDAV format data and performing copy control according to the original copy control information is achieved. The MMT format data, for which copy control information is set, is input and recorded on an information recording medium as BDAV format data. As record data, (a) a stream file including a packet string in which the MMT format data is stored, and (b) copy control information corresponding to the stream file, in which the copy control information corresponding to the MMT format data is reflected, are generated and recorded as an additional header of a packet included in the stream file or as another file.

Abstract: This specification describes techniques for managing assets in a blockchain. One example method includes receiving, from a target user recorded in a distributed database of a blockchain network, a user input including a request to transfer a plurality of asset objects including digital assets corresponding to physical assets associated with the target user, in response to receiving the request, combining the plurality of asset objects in a target object, the target object including an address field used to maintain address information of the plurality of asset objects, deleting address information corresponding to the plurality of asset objects from the target object, and adding the address information to asset receiving objects corresponding to the plurality of asset objects.

Abstract: Method of certification including receiving user data at a device of a certifying entity. The method includes generating a salt that is unique. The method includes hashing the data combined with the salt to create a generated hashed data. The method includes generating a certification record based on signing the generated hashed data using a private key of the certifying entity to create a signed certification of the data. The method includes hashing the certification record. The method includes transmitting the hashed certification record to a blockchain for storing. The method includes receiving a certification tx-ID of the hashed certification record. The method includes generating a certification data block including the certification record and the certification tx-ID. The method includes storing the certification data block to a side chain.

Abstract: A method for securing communication may include: (1) receiving, at the authorization platform and from a hybrid browser component of a computer application, an encrypted payload comprising an authentication code, a bundle identifier, and an application unique identifier; (2) registering, by the authorization platform, a username for a user; (3) receiving, at the authentication framework and from the computer application, the username and the encrypted payload; (4) receiving, at the authentication framework, user login credentials from the user; (5) validating, by the authentication framework, the user login credentials; (6) passing, by the authentication framework to the authorization platform, the encrypted payload; (6) comparing, by the authorization platform the encrypted payload received from the computer application to the encrypted payload received from the authentication framework; and (8) accepting, by the authentication framework, the encrypted payload and tying the process to the computer applicatio

Abstract: Embodiments leverage the PCI-DSS validation of a backend transaction processing system to avoid the payment application having to meet the PCI compliance reporting requirements of the PCI-DSS. When the payment application needs to collect Sensitive Data for a transaction, the payment application makes a request to the payment library, which in turn requests from the backend system a secure web page including fields for the user to enter the specific Sensitive Data to be collected and typically also including a public encryption key generated specifically for the secure web page. The payment library causes the secure web page to be rendered, thereby allowing the user to enter the required information. Upon completion of such data entry, the data entered via the secure web page is pushed back through the payment library to the backend system for processing. The backend system can decrypt the encrypted data using the private key associated with the public/private encryption key pair.

Abstract: Logic to register a personal point of sale (POS) device. Logic may communicate with the registration processor to establish a secure communication channel. Logic may access a basic input output system to obtain platform information. Logic may transmit the platform information to the registration processor to identify a certification associated with the device. Logic may communicate with a payment instrument via a card reader. Logic may transmit an encrypted message from the card reader to the registration processor to bind the payment instrument to the device. Logic may receive a communication from the device comprising platform information. Logic may perform a security protocol to establish a secure communication channel with the device. Logic may determine an existence of the certification for the device in the database based upon the platform information. And logic may register the platform in response to locating the certification of the platform.

Abstract: There is provided a method including generating an initial token being associated with a given context, and sending the initial token to a destination device. The method also includes receiving a scanned token generated by a mobile device scanning an output of the destination device. The output may be generated based on the initial token. In addition, the method includes authenticating the scanned token by comparing the scanned token to the initial token. Furthermore, the method includes generating a productivity indicator based on the scanned token, and outputting the productivity indicator.

Abstract: This specification discloses a method and a system. The method includes: obtaining a Merkle root of one or more proposals initiated by one or more nodes associated with a blockchain; signing the Merkle root of the one or more proposals to obtain a digital signature of the one or more proposals; transmitting the digital signature of the one or more proposals to one or more nodes associated with the blockchain; receiving one or more digital signatures of the one or more proposals from one or more nodes associated with the blockchain respectively; determining that a quantity of the received one or more digital signatures is at least 2 f+1, wherein f is a maximum quantity of abnormal nodes permitted by the blockchain; and generating a proof of consensus for the one or more proposals based on the received one or more digital signatures.

Abstract: A wearable device receives ticket information for an event and information indicating a quantity of funds allocated from an account, associated with a user of a user device, to the wearable device, and stores the ticket information and the information indicating the quantity of funds. The wearable device utilizes a wireless component to pair the wearable device and the user device, and provides, to the user device and via the wireless component, the ticket information and information indicating access privileges for the event. The wearable device generates a token for a PoS device for a charge incurred at the event during an offline transaction with the PoS device, and provides, via a NFC component, the token to the PoS device. The wearable device provides, to the user device and via the wireless component, information indicating that that the token was provided to the PoS device.

Abstract: A computer-implemented method includes: obtaining, by a blockchain node, an invoking request for a first smart contract based on receiving a data structure update transaction, where the transaction comprises an input parameter indicating an updated data structure. The updated data structure that is based on a computer programming language is obtained. The first smart contract is run, comprising: parsing the updated data structure and converting the updated data structure characterized by the computer programming language into updated metadata characterized by a definition description language. A second smart contract comprising pre-update metadata and data is invoked using the updated metadata as input parameters. The second smart contract is run, comprising: replacing the pre-update metadata with the updated metadata, parsing the updated metadata in the second smart contract, and updating a pre-update data structure of the data in the second smart contract based on a parsing result.

Abstract: A data storage method comprises receiving, from a first blockchain node associated with a blockchain, a query for encrypted data stored in the blockchain, wherein the encrypted data is shared by a second blockchain node; determining, through one or more smart contracts, whether the first blockchain node has a permission to decrypt the encrypted data; if the first blockchain node has the permission: sending the encrypted data to an encryption device to decrypt the encrypted data and return data obtained from the decryption to the first blockchain node; determining, through the smart contracts, a reward value to be added to an account of the second blockchain node; and sending a node identifier of the second blockchain node and the reward value to blockchain nodes of the blockchain, enabling each of the blockchain nodes to store the node identifier and the reward value in the blockchain.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for blockchain-based reconciliation are provided. One of the methods includes: creating, by a first blockchain node associated with a blockchain, an account-processing record based on an account-processing operation; generating, by the first blockchain node, a digital signature on the account-processing record by encrypting a digest of the account-processing record using a private key associated with the first blockchain node; and uploading, by the first blockchain node, the account-processing record and the generated digital signature to the blockchain, wherein the account-processing record is stored in the blockchain upon one or more second blockchain nodes confirming the account-processing record based on the digital signature.

Abstract: Virtual currency ledger secured physical currency transmissions include receiving a physical currency transfer request from a physical currency receiver device of a physical currency receiver, and identifying a physical currency deliverer device of a physical currency deliverer. A physical currency delivery confirmation code is then associated with a recipient identified in the physical currency transfer request, and a virtual currency address controlled by the physical currency deliverer and included in a virtual currency public ledger is identified to the physical currency receiver device. A reimbursement request code is then received from the physical currency deliverer device and verified using the physical currency delivery confirmation code.

Abstract: A computing system that includes processor(s), memory(s) and a network interface that communicates with a customer device and a trusted third party. The at least one network interface is configured to receive, from the customer device, identity data for a customer and a request to restore a customer wallet. The at least one processor is configured to verify the identity data for the customer received from the customer device. When the at least one processor verifies the identity data for the customer received from the customer device, the at least one network interface is configured to communicate a request for a first key associated with the customer wallet to a key repository for the trusted third party. The at least one processor is configured to restore the customer wallet using the first key associated with the customer wallet and a second key associated with the customer wallet.

Abstract: The embodiments described herein comprise hardware and software improvements in blockchain-asset exchange technology, whereby one or more servers automatically, based on a set of predetermined rules, executes a mechanism allowing blockchain-asset exchange customers to place standing-limit or market orders for blockchain-based digital assets (e.g., cryptocurrencies) with a counter-party, but without counter-party risk. The counter-party will not receive the payment until the customer's exchange order has executed, and the customer has taken possession and ownership of the desired asset. The customer cannot reverse payment or otherwise rescind the payment from the counter-party once the customer receives the desired asset.

Abstract: A method for secure usage of a gift card via blockchain includes: storing a blockchain including a specific data value related to a gift card that includes a gift card number and a first recipient address; receiving a transfer request including the gift card number, a first digital signature, and a device identifier; verifying the first recipient address based on the first digital signature; generating a new data value comprising the gift card number, the device identifier, and a second recipient address; transmitting the generated new data value to a node associated with the blockchain; receiving a redemption request from a second computing system including the gift card number, a second digital signature, and a submitted device identifier; verifying the second recipient address and submit device identifier based on the second digital signature and the device identifier, respectively; and transmitting a result of the verification to the second computing system.

Abstract: In one arrangement, a method for using symmetric keys between two entities comprising a device and a host include initiating, by the device, a transaction involving original data, wherein the original data needs to be verified by the host. The method further includes deriving, by the device, a first key based on a previously generated key and a first number, wherein the first key is unique to the transaction, and the first number is randomly generated. The method further includes sending, by the device, the first key to the host for verification.

Abstract: A method and system are provided to support a decentralized distributed ledger in which transactions are recorded by parties to the transactions without the use of a blockchain. A distributed ledger system provides a protocol framework that supports the development of protocol flows. A protocol flow is computer code that controls the performance of a transaction by the party or parties to the transaction. Protocol flows can be developed for different types of transactions. The distributed ledger system allows transactions to be proposed, accepted, and notarized by a notary and stored without the use of a blockchain ledger. The distributed ledger system can avoid the expense of the computational and storage resources needed to redundantly verify a transaction and store evidence on the many nodes of a blockchain distributed ledger.

Abstract: A system and method for determining transaction compliance in an off-chain environment to offload computationally-intensive compliance processes for cryptographical transactions. Systems and methods for providing consistency across multiple blockchains by not relying on the limitations of any given protocol to guarantee a cost of executing a transaction be kept to a minimum and keep an on-chain overhead minimal.

Abstract: Methods, systems, and computer-readable storage media for federated data management between partner systems is provided. A hash structure is generated for a first data object and includes a first root hash value. The hash structure maps properties of the first data object with corresponding visibility levels for the first data object. The first root hash value is notarized to store the first root hash value in a blockchain network. A request is received to share data for the first data object from a first partner system to a second partner system. The first partner system determines the data to be shared with the second partner system based on a visibility criteria defined in relation to the first data object and the second partner system. The data and a hash proof for the data for verification of authenticity of the data is shared with the second partner system.

Abstract: A mobile device, such as a cellular phone, can retrieve log data from a secured terminal, such as an automated teller machine. The mobile device can download data including a log from a secured terminal through a connection established therebetween, such as through a wired port on the secured terminal. The mobile device can determine a data representation of a geographic location of the secured terminal determined from at least one of a positioning service and a positioning device, such as from a global positioning system module of the mobile device. The mobile device can automatically upload data including the log and the geographic location to at least one server via a network, such as a wireless 3G network. The at least one server can select the closest secured terminal to the first geographic location, based on a database of known, stored locations of secured terminals.

Abstract: A system comprises a non-transitory machine readable storage medium storing instructions and a database identifying a plurality of assets and a state of each asset. The instructions configure a processor for receiving updates to a distributed electronic ledger managed by plural peer processors. Each update includes an event or change affecting one of the assets. The peer processors verify portions of the ledger describing each event or change. At least one of the updates has not yet been recorded in the ledger at a time of the receiving. The processor computes a state of each asset, based on the updates, receives a request for a state of one of the assets; and responds to the request, reflecting each event and change affecting that asset. The response is performed without waiting for the peer processors to verify an update that has not yet been recorded in the ledger.

Abstract: A system comprises a non-transitory machine readable storage medium storing instructions and a database identifying a plurality of assets and a state of each asset. The instructions configure a processor for receiving updates to a distributed electronic ledger managed by plural peer processors. Each update includes an event or change affecting one of the assets. The peer processors verify portions of the ledger describing each event or change. At least one of the updates has not yet been recorded in the ledger at a time of the receiving. The processor computes a state of each asset, based on the updates, receives a request for a state of one of the assets; and responds to the request, reflecting each event and change affecting that asset. The response is performed without waiting for the peer processors to verify an update that has not yet been recorded in the ledger.

Abstract: Disclosed are techniques for performing positioning operations. In an aspect, a user equipment (UE) transmits, to a positioning entity, a request for positioning assistance data message, the request for positioning assistance data message identifying a serving cell of the UE and one or more neighboring cells of the UE with which the UE is attempting to perform a positioning procedure, and receives, from the positioning entity, a positioning assistance data message in response to the request.

Abstract: The present disclosure relates to off-line generation, storage, and usage of digital assets, such as cryptocurrency. In particular, methods and systems are disclosed for a system for cold payment of digital assets. In one example, a method for usage of digital assets, such as cryptocurrency, includes receiving at least one public key corresponding to at least one off-line cryptographic key pair, receiving a digital asset, determining a set of amounts for the digital asset corresponding to a user selection, assigning an amount of the digital asset to the at least one public key determined by the set of amounts, and transmitting a payment amount to a payee address corresponding to the user selection.

Abstract: A digital electronic device, which performs authentication using a blockchain, includes: a physical node that is connected to a physical blockchain network and a virtual blockchain network constructed in the digital electronic device, and has attribute information including pubic key information, private key information, a unique identifier (ID), and a password available for encryption of a block including transaction data through the blockchain networks; at least one virtual node that is connected to the virtual blockchain network and has attribute information including pubic key information, private key information, a unique identifier (ID), and a password available for encryption of a block including transaction data through the virtual blockchain network; and a short range communication interface module configured to be able to directly communicate with a user communication device without passing through a gateway.

Abstract: Various examples are directed to systems and methods for secure purchasing using a mobile wallet. A first mobile wallet may receive secure purchasing data related to an product from a server system associated with a merchant. The secure purchasing data (e.g., stored on a QR code) may include product information and merchant information allowing the mobile wallet to obtain a public key of the merchant. The mobile wallet may determine whether the purchase of the product requires processing by a second mobile wallet based on transaction rules and at least some of the purchasing data. Based on the determination, the first mobile wallet may either send payment data for purchasing the product to the server system of the merchant, without requesting processing by the second mobile wallet or send a request for processing to the second mobile wallet so that the second mobile wallet can approve or purchase the product.

Abstract: The present disclosure provides a distributed computer system, which includes a plurality of computing devices. Each computing device includes a memory, a portion of a Blockchain, a transceiver, and a processor. The memory stores a plurality of data transaction requests. Each data transaction request corresponds to a block in the Blockchain and includes a cryptographic hash of a previous block, a timestamp, and transaction data. The transceiver receives a data transaction request from a subset of the plurality of computing devices. The processor determines whether the received data transaction request corresponds to at least one block in the portion of the Blockchain. The processor updates an internal record of the Blockchain, based on determining that the data transaction request corresponds to at least one block in the portion of the Blockchain. The processor then verifies the updated internal record of the Blockchain with a computing device in the subset.

Abstract: A method for offline transmission of blockchain details includes: storing, in a computing device, a first private key and a currency amount; receiving a first destination address associated with a blockchain network and a transaction amount; generating a second private key; generating a second destination address associated with the blockchain network using the second private key; generating a blockchain transaction including at least the first destination address, the transaction amount, the second destination address, and a remainder amount based on at least the currency amount and the transaction amount; signing the generated blockchain transaction using the first private key; executing a query to replace the first private key with the second private key, wherein replacement of the first private key includes deletion of the first private key from the computing device; and transmitting the generated blockchain transaction.

Abstract: This disclosure relates to transaction systems and particularly to transaction systems of a peer-to-peer nature for digital assets. The asset transfer system may store user, user accounts, and transaction information in associated logic tables within a memory of a server hosting the asset transfer system. Through the use of, but limited to, curl functions, the asset transfer system may communicate with remote servers housing user wallets and user wallet information to perform transactions of digital assets between users. Before verification and proof of work can be established to complete the transfer of digital assets, the asset transfer system may report to the users of a transaction the details of the transaction. Users of the asset transfer system need not know encrypted or random keys to perform such digital asset transactions and may transfer digital assets only by identification of a username stored within the asset transfer system.

Abstract: A zero-knowledge proof purchase system and process using blockchain is disclosed. The system may comprise a customer device, a merchant system, an issuer system, and a blockchain network having a zero-knowledge proof (ZKP) smart contract. The system may implement a zero-knowledge proof algorithm having a key generator function, a proof function, and a validate function. Each function may be configured to perform various tasks in the system to support and enable zero-knowledge proof purchases.

Abstract: A system is configured to perform operations that include receiving a purchase request to use a consumer digital wallet account of a user to pay for an item sold by a merchant, the consumer digital wallet account being included as a payment method in a merchant digital wallet account provided by the merchant to the user. The operations further include generating a single-use payment token based on a non-transactable token. Additionally, the operations include transmitting, to an existing card payment network, a card transaction message that includes the single-use payment token, the single-use payment token causing the existing card payment network to route the card transaction message back to the system. The operations also include causing payment to be remitted from the user to the merchant using a payment method included in the consumer digital wallet account.