A method for securing an interblockchain transaction includes receiving, from a first user application, a registration request including a first permissioned blockchain public key and a first permissionless blockchain public key. The method also includes performing, by the processing circuitry, receiving, from a second user application, a second registration request including a second permissioned blockchain public key and a second permissionless blockchain public key. The permissioned blockchain public keys are valid on the permissioned blockchain and the permissionless blockchain public keys are valid on the permissionless public blockchain. In addition, the method includes receiving, from the first user application, a transaction identification, the transaction identification identifying a first transfer transaction executed on the permissionless public blockchain. The transaction identification identifies the first and second permissionless blockchain public keys.

In one embodiment, a receipt server includes an acquisition unit and an output unit. The acquisition unit acquires receipt data on a commercial transaction, identified by transaction identification information included in settlement sales data reported from a settlement terminal to a settling agent that assists settlement of the commercial transaction, from a receipt storage unit that stores receipt data generated by the settlement terminal at a time of settlement of the commercial transaction. The output unit outputs information, relating to a purchased commercial product included in the receipt data acquired by the acquisition unit to a settlement server of the settling agent.

A method for securing a cryptocurrency transaction on a permissioned blockchain, which involves cryptocurrencies of a permissionless public blockchain, includes receiving a join request including a transaction identification. The transaction identification identifies an enroll transaction involving a public smart contract deployed on the permissionless public blockchain, the enroll transaction identifying a permissioned blockchain public key being valid on the permissioned blockchain and transferring a cryptocurrency balance to the public smart contract. The method further includes verifying that the enroll transaction was properly executed, crediting an account corresponding to the permissioned blockchain public key with the cryptocurrency balance, and receiving a send request identifying a second cryptocurrency balance and a second permissioned blockchain public key being valid on the permissioned blockchain. The method also includes transferring the second cryptocurrency balance from the permissioned blockchain public key to the second permissioned blockchain public key.

A secure cryptocurrency transactional system for actuating transactions involving electronic gaming machines and cryptocurrency wallets.

Provided are a payment method and system through generation of a one-time payment-only number of a real card linked with an application, wherein in order to make payment safely by generating a one-time payment-only number every payment without leaving card information of a user in a provider's payment terminal or by using the generated one-time payment-only number, when a real card is linked with an application installed on a user terminal and the payment terminal recognizes the real card, a user signature input window, and transaction information about payment performed with a one-time payment-only number generated by a card company server are displayed on a screen of the application of the user terminal, and payment is performed when a signature of the user is input to the signature input window.

System and method are described for creating and validating identities across multiple blockchains. According to an embodiment, a system uses decentralized resources to receive an enrollment request comprising entity information to create a multi-chain identity of an entity and create an account with a global identifier for the entity and one or more decentralized identities (DIDs), each associated with a cryptographic blockchain of a set of supported cryptographic blockchains. The system maintains a mapping of the global identifier and the one or more DIDs created, share the global identifier and the one or more decentralized identities in a digital wallet associated with the entity. In an embodiment, the digital wallet is implemented as an application to be run on a computing device associated with the entity. The digital wallet stores the global identifier, the one or more decentralized identities, and corresponding cryptographic keypairs associated with each of the one or more DIDs.

A system and method to conduct secure electronic financial transactions are provided. The method includes receiving a request, from a user, to perform a transaction with a merchant; generating a virtual check comprising a checking account number, a bank routing number, and a date; displaying the virtual check on at least one of a display of an electronic device of a user or the merchant; receiving input from the user corresponding to at least one of a plurality of check fields; receiving a virtual signature from the user; encrypting the virtual signature; storing the encrypted virtual signature in a database; decrypting and embedding, in the image of the virtual check, the virtual signature received from the user; populating the virtual check based on the received input and depositing the virtual check.

To conduct a payment transaction at a merchant's point of sale using a mobile device, the mobile device initiates an authenticated communication session with a payment agent. The payment agent is an entity responsible for facilitating a payment transaction between the merchant and purchaser via their respective financial institutions. During the authenticated communication session, response to an input indicating the user of the mobile device wishes to make a payment, the mobile device generates a unique payment key that is based on at least one unique data of the mobile device. The mobile device transmits the payment key to the payment agent, and then transfers a copy of the payment key to the point of sale system. The merchant's payment system that transmits the payment key to the payment agent in a transaction request. The payment agent then verifies that the received payment key is the same as they received from the mobile device, and that the authenticated communication session is still valid, and then approves the transaction.

A system, method, device, and platform for performing a gaming utilizing blockchain. A player profile is created in response to information received from a player. Gaming information is received from the player associated with the one or more games. Selections are assigned to the player for the one or more games utilizing player profile and the gaming information. Winners and a host with each of the one or more games of the one or more games are compensated once the one or more games are completed. The player profile, the gaming information, the selections, and the winners are documented utilizing the blockchain.

There are provided systems and methods for a carbon neutral blockchain protocol for resolving carbon offsetter payments for cryptocurrency transactions. A service provider, such as an online transaction processor, may provide a green wallet and network protocol that provides carbon offsetting fees and payments to carbon offsetters in order to account for carbon emissions and usage when processing cryptocurrency transactions on a blockchain network protocol. A green wallet may be provided, which allows registration of carbon offsetters and use of green addresses to cause cryptocurrency to be processed in a green transaction. A user's digital wallet may sign an initial cryptocurrency transaction and provide the fee to the green wallet. The green wallet may then resolve the cryptocurrency transaction by further signing the transaction and transmitting the fee to a digital wallet of the carbon offsetter over another cryptocurrency processing network.