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.

A novel method and instruction set for storing and trading Non-Fungible Tokens (NFTs), on Bitcoin blockchain. As proof of NFT ownership, proposed methods allow a user to perform the following operations with an NFT: (1) store NFT token on Bitcoin blockchain; (2) securely associate NFT data unit with digital assets (photos, video, audio, digital documents, etc.); (3) grouping many NFT tokens together to a collection with a single unique identifier; (4) safely sell and buy an NFT using Bitcoin ecosystem. These actions and validation of the transactions are performed using Bitcoin transactions.

A computer-implemented method of generating a transaction associated with a blockchain, the transaction being for distributing amounts of an allocation of a digital asset, wherein the allocating party is associated with an allocating public key linked with the allocation, and wherein each recipient party is associated with a respective ownership public key. The method comprises obtaining a respective ownership public key of each of the one or more recipient parties. For each of the one or more recipient parties, a respective payment public key is generated based on (i) the ownership public key associated with that recipient user, and (ii) the allocating public key. The transaction comprises one or more output scripts, each output script configured to transfer a respective amount of the allocation to a respective payment address, the respective payment address being based on the respective payment public key.

In a first aspect, the present disclosure proposes methods, devices and systems for implementing a payment service for enabling transactions associated with a client to be written into, or stored in a distributed ledger, i.e. a blockchain. The payment service is implemented as an API to which one or more clients have access to processing digital asset payments pertaining to a respective client. In a first aspect includes obtaining mining fee quotes from a plurality of miners for a client and processing a request for submitting a transaction to the blockchain based on a selected fee quote. In a second aspect, the present disclosure proposes methods, devices and systems for requesting a transaction associated with a digital asset payment to be mined in a blockchain, based on a digital asset payment between a client (payer) and a customer (payee) of the client. The request being associated by a selected fee quote and/or service level associated with the selected fee quote among the received fee quotes in the above aspect. In a third aspect the method includes creating, processing and mining a blockchain transaction associated with a client by a miner, based on the miner satisfying the selected fee quote from the client, as mentioned in the above aspect.

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.

The present invention relates to a two level crux chain platform with a Proof of History (PoH) for increasing security, robustness and/or verifiability of a blockchain includes a first initial block with a node assigned to an address of a shard, a plurality of following blocks comprising a new address for each of the following blocks generated using previous address and previous block head by a ladder swapping protocol, a record stream with a plurality of stream value and each stream value is a current record value hashed with a previous stream value and a blockchain server for storing a plurality of modules.

A method comprises receiving an ad event data including data about a plurality of ad events, and including a user ID and an ad ID for each ad event in the ad event data set, where the ad event data set has been anonymized applying a one-way encryption key for each user ID in the ad event data set, and a two-way encryption key for the ad ID in the ad event data set. The attribution processor receives a customer data set including data about a plurality of customers, including a user ID and a customer value for each customer, where the customer data set has been anonymized using the one-way encryption key for each user ID in the data, and a private encryption key for the customer value. Without decrypting the received ad event data set and the received customer data set, the processor then matches ad events for each conversion by comparing the user IDs in the encrypted ad event data set to the user IDs in the encrypted customer data set to create a set of contributing ad events, assigns a share of the customer value to each relevant ad event, sums homomorphically the encrypted customer values for contributing events, and determines a recommendation for serving advertisements.

Disclosed is a system (100, 200) for authenticating a digital transaction by implementing a multi-party computation protocol. The system comprises a first set of first nodes (102) configured to generate a first data (104), wherein each of the first nodes, from the first set of first nodes, in a second set of first nodes (102A) is an independent party and a server arrangement (106) communicably coupled with the first set of first nodes. The server arrangement is configured to receive the first data from the first set of first nodes, generate a second data (108), verify whether a number of other of the first nodes (102B) not in the second set of first nodes is equal to or at most only one greater than a number of first nodes in the second set of first nodes and authenticate the digital transaction based on the verification, using the secret shares in the first data and the second data.

The present invention is a user-friendly patent ecosystem incorporating an analytics engine and Hyperledger. The present invention manages its blockchain-based Global Patent Registry (GPR) on Hyperledger. The present invention provides a GPR blockchain solution for chain of custody patent registration with a focus on backward-compatibility for the IP platform middleware of the present invention.