One embodiment of the present disclosure provides a system and associated processes for sharing cardholder data (CHD) between a merchant that utilizes tokenization and a second merchant that may or may not utilize tokenization. In one embodiment, the merchant, or an employee of the merchant, can use the system and associated processes to reacquire CHD from a tokenization provider system. In one embodiment, the merchant identifies to the tokenization provider system a desire to share CHD, which is associated with a token, with a second merchant. The merchant and/or the tokenization provider system can then invite the second merchant to register with the tokenization provider system. Once registered with the tokenization provider system, the second merchant can access any CHD that the merchant associated with the second merchant.

Transaction ID information corresponding to proof certificate-verifying transaction information is transmitted to a block chain retention server if a request for proof certificate information is sensed, when the proof certificate-verifying transaction information generated by using the proof certificate information, to be provided to a customer, is recorded in a block chain retention server and the transaction ID information is managed. The proof certificate-verifying transaction information corresponding to the transaction ID information is acquired from the block chain retention server. A proof certificate index hash value used for comparison, acquired from the proof certificate information to be provided to a customer and corresponding to a request, is compared with a proof certificate-verifying index hash value acquired from the proof certificate verifying-transaction information. Verification information generated with reference to the comparison result of the proof certificate index hash value used for comparison and the proof certificate-verifying index hash value are provided.

Disclosed are various embodiments for issuing virtual cards to client devices. Also disclosed are embodiments for provisioning a transaction terminal to process transactions with virtual cards. A zero-knowledge proof algorithm can be utilized to validate the transactions. A virtual card can be based upon a public key of a client device that is managed by a hardware security module.

In an aspect, the present disclosure proposes methods, devices and systems for processing blockchain transactions associated with a client. A payment service is implemented as a gateway or an API endpoint to which one or more clients have access to. A request to submit a transaction received from a given client is associated with a call-back identifier. The call-back identifier is such that it enables direct communication between the given client and another entity, such as a miner or another counterparty. The payment processer submits the transaction to a miner, this submission associated with the call-back identifier. Then, once a corresponding blockchain transaction has been created by a miner, a call-back notification pertaining to it can be provided for the client directly from the miner using the call-back identifier.

A system for decentralized private blockchains network is provided. In some implementations, the system performs operations comprising receiving, at a client system, data having a sensitivity level, the operations further comprise splitting, at the client system, the data based on the sensitivity level, the splitting comprising splitting the data into data portions. The operations further comprise storing, at a decentralized storage system, the decentralized storage system comprising a plurality of private blockchains, each of the data portions in a separate private blockchain of the plurality of private blockchains. The operations further comprise storing, at a multi-decentralized private blockchains network (MDDV), pointers to locations of the data portions within the decentralized storage system. Related systems, methods, and articles of manufacture are also described.

For privacy-preserving attribution, the exposure and/or attribution to physical media (e.g., a surface or object) is determined on-board the mobile device. The exposure and/or attribution may be communicated remotely from the mobile device without passing specific locations and/or identifiers of the operator. The attribution information may be used by others without having access to private information, which never leaves the mobile device.

A banking device in accordance with the present disclosure includes processing circuitry that is configured to receive user authentication information from a mobile device of a user interacting with the mobile device. The user authentication information may include a token indicating that the user of the mobile device is authenticated. The processing circuitry is further configured to contact, in response to reception of the user authentication information a banking server to initiate a banking transaction; and initiate the banking transaction.

A method for mediating an atomic swap includes: receiving a swap request from a first computing device including a first address associated with a first blockchain and a network identifier associated with a second blockchain; identifying a second computing device using the network identifier and a second address associated with the second blockchain; generating a proof value and a hashlock using the proof value; transmitting (i) the hashlock and second address to the first computing device, and (ii) the hashlock and first address to the second computing device; verifying a first blockchain transaction on the first blockchain for transfer to the first address, and a second blockchain transaction on the second blockchain for transfer to the second address; and transmitting the proof value to blockchains node associated with the first and second blockchains.

A method is provided for operating an ultra-wide band (UWB) device, the method including transmitting, to a gate, a first message including a device identity (ID) for identifying the UWB device and a transaction ID for identifying a transaction of the UWB device, receiving, from the gate, a second message including a gate authentication cryptogram generated based on the device ID and the transaction ID, verifying the gate based on the gate authentication cryptogram, encrypting payment information for the transaction in response to the gate being verified, and transmitting, to the gate, a third message including the encrypted payment information.

Systems and methods for creating and managing decentralized autonomous organizations (DAOs) using distributed ledgers are provided. An investor can submit a proposal for disbursement of funds from the DAO for the creation of digital objects. The DAO can be associated with a set of voting share tokens that can be provided to the investors according to their contributions to the DAO. When investors use their tokens to vote on the proposal, a smart contract deployed to a distributed ledger for the DAO can review the votes and the corresponding tokens to determine if the proposal is approved. If so, funds from the DAO can be provided to content creators for the creation of digital objects that can be published to a digital object marketplace. Financial distributions resulting from the sale of these digital objects can be automatically provided to investors according to their respective voting share tokens.