Abstract: A computer-implemented method (600) and system (1) for verifying ownership of a computer software after installation and prior to execution using a distributed hash table (13) and a peer-to-peer distributed ledger (14). This may be the Bitcoin blockchain or an alternative implementation. The method includes determining (610) a second user public key associated with a second user (24) from a transaction record stored on the peer-to-peer distributed ledger (14). A second public key associated with the second user may be determined (620) from an entry on the distributed hash table (13). The method further includes comparing (630) the second user public key and the second public key, and verifying (640) the ownership of the computer software based on the comparing of the second user public key and the second public key.

Abstract: A method for electing a representative node device performed by a first node device in a blockchain system includes: broadcasting candidate addition transaction data in the blockchain system, the candidate addition transaction data carrying credential data, the credential data being received from a target server and indicating that a first node device meets a qualification requirement for a candidate node device; storing the candidate addition transaction data on a target blockchain of a blockchain system when a plurality of node devices in the blockchain system verify the candidate addition transaction data by consensus; and participating in an election of the representative node device according to the candidate addition transaction data stored on the target blockchain.

Abstract: A method for delivering encrypted data through a blockchain with limited transferability includes: receiving, by a receiver of a blockchain node, a transfer submission including at least a transfer token, a recipient address, and an encrypted data message; determining, by a processor of the blockchain node, a number of past transfers for the transfer token in a blockchain associated with a blockchain network that includes the blockchain node; validating, by the processor of the blockchain node, that the transfer token is eligible for an additional transfer based on at least the number of past transfers; generating, by the processor of the blockchain node, a blockchain data value including at least the encrypted data message, the transfer token, and the recipient address; and transmitting, by a transmitter of the blockchain node, the generated blockchain data value to one or more additional nodes included in the blockchain network.

Abstract: Systems, methods, and computer program products are provided herein for hyperspectral imaging based electronic authentication resource transfers. An example method includes receiving a resource transfer request associated with at least a first user and receiving hyperspectral image data associated with the first user. The method further includes extracting, via a hyperspectral imaging module, one or more account credentials of the first user from the hyperspectral image data. The method also includes effectuating the resource transfer associated with an account of the first user as defined by the one or more account credentials. The hyperspectral image data may be generated in response to an image capturing operation performed by the hyperspectral imaging module and may be indicative of a hyperspectral image supported by a resource transfer object.

Abstract: Integrated system enables implementors to integrate functionality into software systems to enable user identity and access management across customers/products. Management platform enables a pool of accounts/technical components representing users/machines to be authenticated against systems/products, authenticated accounts/technical components to perform functions within systems/products, representations of external software systems as products to be mapped to identities, accesses, organizations, and permissions, and representation of groups of accounts organized by a common aspect where the groups can request access to products licensed by the groups. Multi-factor authentication module enables various third-party technologies to lend MFA functionality to the management platform and the users. Product license purchase module enables an entity external to the implementor and represented by an organization to request and gain access to products in a formalized manner.

Abstract: Systems and methods build blockchains and verify assets for smart contracts. A system includes a memory, a blockchain, a set of nodes, a set of verifiers, a set of miners, and a consensus protocol. The memory can have a block data structure representing a transaction for an asset having an identifier and at least one verifiable characteristic. The consensus protocol can include rules for: receiving the stake at risk from the verifiers, providing the reputational score to the verifiers, verifying the verifiable characteristic of the asset by the verifiers, cryptographic verification by the miners, adding the new block to the blockchain by the miners, providing the reward to the miners, and distributing the copy of the blockchain to each node.

Abstract: An example method of reimbursing pharmacy-related transactions includes receiving first data describing a transaction between a patient and a pharmacy. The transaction includes dispensing of a medication. A reimbursement data packet is determined based on the first data. The reimbursement data packet includes second data describing a reimbursement claim to be submitted to a payer system for the transaction. The reimbursement data packet is transmitted from the computer system to a plurality of other computer systems. A response is received from each of the other computer systems. Each response indicates whether a respective one of the other computer systems determined that the reimbursement claim is valid. A determination is made that the reimbursement claim is valid based on the responses. An entry describing the transaction and reimbursement claim is added to a ledger, and the reimbursement claim is submitted for fulfillment.

Abstract: Disclosed embodiments are related to blockchain asset token management systems, and in particular, to Multiple Decentralized Tokenization with Personal Control (MDTPC). MDTPC allows users to determine how and when asset token evaluation is performed, and also allows users to determine which token management services they wish to use to manage and store their asset token and related data. In embodiments, multiple blockchain token management services are utilized in conjunction with individual digital wallets to share token data and validate ownership of tokens. A registry service is used to ensure visibility of tokens across multiple token management services, which increases the likelihood of identifying the rightful owner of asset tokens. Other embodiments may be described and/or claimed.

Abstract: Systems, methods, and computer-readable storage media to protect non-fungible tokens (NFTs) using a protection architecture. One method includes receiving an NFT, authenticating the NFT including authenticating or verifying the NFT using a key and authenticating the link of the NFT, and protecting the NFT including generating a public-private key pair, encapsulating the NFT within a control structure, updating an NFT account in an overlay ledger, generating and storing a cold storage object in a cold storage ledger, and broadcasting the NFT to a blockchain storage.

Abstract: A method includes receiving an agreement associated with a signing party by a computing system, receiving a biometric sample captured from the signing party by the computing system, generating a hash of the agreement by the computing system, and receiving a secret knowledge factor by the computing system. The method further includes generating an encryption key using the secret knowledge factor as an input to a password authenticated key exchange protocol by the computing system and generating a biometric-based electronic signature token by encrypting the biometric sample and the hash of the agreement with the encryption key by the computing system. The method further includes generating a smart contract based on the agreement by the computing system. The smart contract includes terms of the agreement and the biometric-based electronic signature token. The biometric-based electronic signature token providing biometric-based pre-authorization to be initiated by the smart contract.

Abstract: In response to detecting a request from a first device associated with a first user to utilize a digital wallet associated with a second user, a computer system determines if the first user is authorized to utilize the digital wallet associated with the second user. Further, in response to determining that the first user is authorized to utilize the digital wallet associated with the second user, the computer system allows the first device restricted access to the digital wallet.

Abstract: Embodiments of this application provide a blockchain-based data processing method, a device, and a medium. The method includes: sending a first channel closing message on a chain-off channel; receiving a second signature in a second state and a second channel closing message that are sent on the off-chain channel, where the second signature is obtained by signing the second channel closing message; and signing a third channel closing message to obtain a first signature in the second state, and sending the first signature. This application can ensure transaction security and improve a transaction processing capability.

Abstract: Methods and systems for omni-chain interoperability protocol in omni-chain network is disclosed. The method includes receiving by a first node, an event data from a first blockchain. The method includes attesting the event data based on a Threshold Signature Schemes (TSS) process. The method includes transmitting the attested event data to time nodes on a timechain. Upon receiving the attested event data, the time nodes validate the attested event data. The validated event data is available for a second node on a second blockchain to access. The second node is configured to access the validated event data from timechain, attest the validated event data along with other nodes on the second blockchain, and deploy a second smart contract on the second blockchain. The second smart contract completes a transmission of the validated event data as an ongoing transaction from the first blockchain to the second blockchain.

Abstract: A diamond asset comprising one or more diamonds and an encryption chip is used to asset-back a cryptographic token that can be used to conduct transactions. A user device executes an application programming interface configured to access a blockchain that stores a smart contract associated with the cryptographic token backed by the value of the one or more diamonds. When the user device receives an instruction to perform a transaction related to the cryptographic token, the user device causes the encryption chip to sign the smart contract. In response to determining that the smart contract was signed by the encryption chip, the user device causes the transaction to be performed.

Abstract: A method for optimizing blockchain storage size through use of relative values includes: receiving, by a blockchain node in a blockchain network that manages a blockchain, a plurality of blockchain data values, each including unspent transaction outputs, at least one destination address, and, for each destination address, an original currency amount; identifying a base value; modifying the original currency amount included in each blockchain data value to be a relative currency amount based on a difference between the identified base value and the original currency amount; generating a new block, the new block including a block header and the modified plurality of blockchain data values; and transmitting the generated new block to a plurality of additional nodes in the blockchain network.

Abstract: An electronic signature service of a provider network may specify a virtual electronic signing device (ESD) to be used by user accounts (e.g., retail sales businesses) to generate digital signatures for documents (e.g., sales receipts). The electronic signature service may establish an isolated virtual network (IVN) on behalf of the client (e.g., taxing authority or other entity), which is managed by the client via a client interface. The electronic signature service may instantiate, on behalf of a user account, an ESD compute instance based on the virtual ESD specification. In response to receiving a request for a digital signature of a document, the ESD compute instance generates a digital signature based on the document and sends the digital signature to the user account. The service may store the signature and associated document data, which can subsequently be used for auditing (e.g., tax auditing).

Abstract: This specification describes a system and method that enables bitcoin signed transactions to be accepted as a payment for goods and services instantly and off-line, without the need to wait for confirmation that the transaction is included in a valid block, or even for confirmation that a transaction has been received by the network. Building on the concept of a one-time signature implemented within bitcoin script, this method involves a payer providing the payee with a special compensation key at the point-of-sale which can be used to claim a time-locked deposit output when combined with a ‘revealed’ private key, if (and only if) a double-spend is perpetrated by the payee. The validity of this compensation key is guaranteed via a novel type of zero-knowledge-proof, which is highly efficient: the proof can be generated in ˜5 milliseconds and can be verified in ?30 milliseconds.

Abstract: A blockchain enabled electronic futures trading system and method provided which allows for optional computerized delivery of cryptocurrency. A trade determination system allows a buyer and seller computer system to trade a future on a cryptocurrency such as bitcoin. Additionally, the trade determination system communicates with a central clearing computer system that allows the seller to provide, using the block chain, an amount of bitcoin equal to or greater than the underlying future by transferring the bitcoin from a seller bitcoin wallet associated with the seller computer system to a central clearing bitcoin wallet associated with the central clearing computer system. Upon the expiration date of the future, the seller may optionally select to provide to the buyer the bitcoin that was previously transferred to the central clearing bitcoin wallet instead of fiat currency.

Abstract: A computer-implemented method comprising receiving a transaction request from a first computing device, the transaction request corresponding to a pending transaction between the first computing device and a second computing device and comprising a first set of transaction attributes; appending block instances to blockchains of the first and second computing devices, retrieving or receiving, from the second computing device, a second set of transaction attributes; when the first set of transaction attributes match, identifying a second blockchain associated with the pending transaction; automatically executing a protocol to compare the first set of transaction attributes with data stored onto a ledger of the identified second blockchain; and, in response to determining that the first set of transaction attributes complies with data of the ledger of the identified second blockchain, appending block instance to the blockchain comprising data corresponding to the transaction request to blockchains of the first a

Abstract: A computer-implemented method comprising receiving a first event request corresponding to a pending event between a first computing device and a second computing device, the first event request comprising a first set of event attributes corresponding to the pending event; transmitting, each of a plurality of first subsets of event attributes to a different set of nodes; receiving a second event request corresponding to the pending event between the first computing device and the second computing device; and transmitting each of the plurality of second subsets of event attributes to a different set of the plurality of sets of nodes, wherein each of the plurality of sets of nodes compares the first subset of event attributes that the set of nodes receives with the second subset of event attributes that the set of nodes receives; and a block instance corresponding to the pending event to a blockchain.