Mastercard International Incorporated

Mastercard International Incorported

Steven Charles Davis

Rakesh Yadav

Sébastien Le Callonnec

Sarala Buradagunta

Dmytro Kryvoshei

Simon R Dix

Jason Jay Lacoss-Arnold

Donghao Huang

Srinath Ravinathan

Robert Collins

Eduardo Andrade

Rob Byrne

Hancong Guan

Deborah Eleanor Barta

Ashish Raghavendra Tetali

Mohammed Sadiq Ahmad

Leandro Nunes Da Silva Carvalho

David James Fleming

Rajasekaran Dhamodharan

Garry Lyons

Joan Lee Rohlfing

Paul Taylor

A method for atomic exchange of assets on multiple blockchains using transient key pairs includes: generating, by a first computing device, a proposal message, the proposal message including at least a first transaction value, a first network identifier corresponding to a first blockchain, a second transaction value, a second network identifier corresponding to a second blockchain, and a swap public key of a swap cryptographic key pair; generating, by the first computing device, a first digital signature for the proposal message; encrypting, by the first computing device, the first digital signature using the swap public key and a first private key of a first cryptographic key pair; appending, by the first computing device, the encrypted first digital signature to the generated proposal message; and transmitting, by the first computing device, the generated proposal message with appended encrypted first digital signature to a second computing device.

Method and system for the atomic exchange of blockchain assets using transient key pairs

A method for automatic configuration of a communication network includes: generating a request message, the request message including a communication address associated; transmitting the generated request message as a broadcast message to a plurality of computing devices using a predefined user datagram protocol (UDP) port, the message being broadcast with a predetermined time to live; receiving agreement messages from computing devices transmitted by the respective computing device using the predefined UDP port, each agreement message including a communication address associated with the respective computing device and a specified transmission control protocol (TCP) port; identifying at least one of the one or more agreement messages for establishment of communication; and establishing a communication connection to the computing device associated with each identified agreement message using the specific TCP port.

Method and system for node discovery and self-healing of blockchain networks

A method for conveying auditable information regarding provenance of a product that is cryptographically accurate while retaining complete anonymity of product and participant on a blockchain includes: receiving a product identifier; generating a digital token by applying a hashing algorithm to the product identifier; generating an entry value by applying the hashing algorithm to a combination of an event identifier and the digital token; generating a digital signature by digitally signing a data package using a private key of a cryptographic key pair, where the data package includes at least a blockchain address, the event identifier, and the digital token; and transmitting the blockchain address, the digital signature, and the entry value to a node in a blockchain network.

Method and system for generalized provenance solution for blockchain supply chain applications

A method for generating a universal distributed data storage includes: receiving a plurality of data values; generating a key for each of the plurality of data values, wherein the respective key is generated via application of a hashing algorithm to the associated data value; storing, in a database, each of the plurality of data values and the associated generated key as a plurality of key-value pairs; receiving a plurality of additional key-value pairs, wherein each value of the plurality of additional key-value pairs is not included in the plurality of data values; and storing, in the database, each of the plurality of additional key-value pairs, wherein each key included in the plurality of additional key-value pairs is generated via application of the hashing algorithm to the associated value and is not included in the keys generated for each of the plurality of data values.

Method and system for distributed data storage with eternal integrity guarantees

A system for communicating between blockchains on heterogeneous blockchain networks. The system can include a sending blockchain configured to transmit a first message via a sending blockchain protocol, wherein the sending blockchain forms a part of a sending blockchain network. The system can include a sending adapter node configured to receive the first message from the sending blockchain, and translate the first message from the sending blockchain protocol to an adapter protocol. The system can include a receiving adapter node configured to receive the first message from the sending adapter node, and translate the first message from the adapter protocol to a receiving blockchain protocol. The system can include a receiving blockchain configured to receive the first message from the receiving adapter node, and validate the first message, wherein the receiving blockchain forms a part of a receiving blockchain network.

Method and system for communication between blockchains on heterogeneous blockchain networks

A method for assisting wallet providers in regulatory compliance for blockchain transactions includes: receiving, by a receiver of a processing server, a new blockchain transaction from a first computing device, the new blockchain including at least a destination address associated with a blockchain wallet as a recipient for the new blockchain transaction; generating, by a processor of the processing server, a reference identifier for the new blockchain transaction; identifying, by the processor of the processing server, a profile for the blockchain wallet based on the destination address; transmitting, by a transmitter of the processing server, the reference identifier to the first computing device; and transmitting, by the transmitter of the processing server, a notification message to a second computing device, the notification message including at least the reference identifier and data associated with the blockchain wallet.

Method and system for regulation of blockchain transactions

A method for providing consent for provisioning data in an opaque blockchain, includes: receiving, by a receiver of a processing server, a consent request for data associated with the processing server stored on a blockchain, the consent request including at least two digital signatures, where a first digital signature is generated by a regulating entity and a second digital signature is generated by a moderating entity in the blockchain network; validating, by a processing device of the processing server, the first digital signature and the second digital signature; digitally signing, by the processing device of the processing server, the received consent request using a private key of a first cryptographic key pair; and transmitting, by a transmitter of the processing server, the digitally signed consent request to the regulating entity.

Method and system for consent to time-bound queries in a blockchain

A method for processing votes in a public blockchain includes: generating an election reference and candidate references; generating an asymmetric cryptographic key pair comprised of a master private key and master public key; generating a registration block for addition to a blockchain including the election reference, candidate references, and master public key; transmitting the registration block to nodes associated with the blockchain; receiving a plurality of voting messages, each including a vote and the election reference, where the vote includes a voter reference and at least one candidate reference; generating one or more voting blocks for addition to the blockchain including the received votes; and transmitting each generated voting block to nodes associated with the blockchain.

Method and system for public elections on a moderated blockchain

A method for verification of a data value via a Merkle root includes: storing, in a memory of a processing server, a Merkle root; receiving at least a data value, a nonce, and a plurality of hash path values; generating a combined value by combining the data value and the nonce; generating a first hash value via application of a hashing algorithm to the combined value; generating a subsequent hash value via application of the hashing algorithm to a combination of the first hash value and a first of the plurality of hash path values; repeating generation of the subsequent hash value using a combination of the next hash path value of the plurality of hash path values and the most recent subsequent hash value; and verifying the data value based on a comparison of the Merkle root and the last generated subsequent hash value.

Method and system for verification of identity attribute information

A system for enabling communication between blockchains on heterogeneous blockchain networks. The system can include a sending blockchain network comprised of a sending blockchain that includes a plurality of blocks, each block including a block header and one or more transaction values associated with an identification request transmitted by the sending blockchain. The system can include a directory service node configured to receive the identification request from the sending blockchain, and identify a receiving blockchain, which forms part of a receiving blockchain network. The system can include an identity service node configured to receive a trust request from the directory service node to determine whether a valid trust certificate is available for the receiving blockchain, and enable communication between the sending blockchain and the receiving blockchain, when the valid trust certificate is determined to be available.

Method and system for enabling communication between blockchains on heterogeneous blockchain networks

Exemplary systems and methods for the addition of a block to a permissioned blockchain using efficient consensus are disclosed. The methods and systems may include receiving transaction messages having transaction values from consensus nodes and generating a Merkle root for the transaction messages using transaction references and a proposed block header having the Merkle root and a hash of the header of the most recently added block in a blockchain. The proposed block header may be hashed and transmitted with a proposal message having a digital signature to auditing nodes. A response message accepting the digital signature may be received and an accept message may be transmitted to the auditing nodes and a confirmation message may be transmitted to the consensus-nodes. A new block may be written to the blockchain having the transaction values from the transaction messages and a header including the proposed block header and digital signature.

Method and system for an efficient consensus mechanism for permissioned blockchains using audit guarantees

A method for linking blockchain transactions to privately verified identities includes: storing account profiles, each profile including data related to a transaction account including an account identifier and account data; receiving a transaction message, the message including a first data element configured to store a personal account number, a second data element configured to store a merchant identifier, and a third data element configured to store a blockchain network identifier; identifying a first account profile that includes the personal account number; identifying a second account profile that includes the merchant identifier; receiving a transaction notification, the notification indicating a transaction processed using a blockchain network associated with the blockchain network identifier and including a transaction identifier and an address identifier associated with the first or second account profile; and storing a linkage between the transaction identifier and the address identifier, the personal account number, and/or the merchant identifier.

Method and system for linking blockchain transactions to private verified identities

A method for performing authentication of a client device using a hash chain includes: receiving a first data request from a client device, the first data request including at least a user identifier and a first hash value; transmitting a first data response message to the client device; receiving a second data request from the client device, the second data request including at least the user identifier and a second hash value; generating a validating hash value by applying a hashing algorithm to the second hash value; validating the first hash value as being equal to the generated validating hash value; and transmitting a second data response message to the client device upon successful validation of the first hash value, wherein the second data response message includes one or more data values associated with the user identifier.

Method and system for HTTP session management using hash chains

A system for communicating between blockchains on heterogeneous blockchain networks. The system can include a sending blockchain configured to transmit a first message via a sending blockchain protocol, wherein the sending blockchain forms a part of a sending blockchain network. The system can include a sending adapter node configured to receive the first message from the sending blockchain and translate the first message from the sending blockchain protocol to an adapter protocol. The system can include a receiving adapter node configured to receive the first message from the sending adapter node and translate the first message from the adapter protocol to a receiving blockchain protocol. The system can include a receiving blockchain configured to receive the first message from the receiving adapter node, and validate the first message, wherein the receiving blockchain forms a part of a receiving blockchain network.

A method for moderation in a permissioned blockchain using a hash-oriented scheme includes: storing a blockchain including a most recent block; receiving transaction data values; receiving a first reference value and a second reference value; generating a first hash value by hashing the first reference value; generating a block proof including the first hash value, a second hash value, a third reference value, and a block value; verifying a block header of the most recent block using the block proof; receiving a new block value; generating a new block header including the first reference value, the second reference value, a fourth reference value, and the new block value; generating a new block for the blockchain including the new block header and the transaction data values; and transmitting the new block to one or more additional nodes associated with the blockchain.

Growing community of inventors

Saint Peters, MO, United States of America

Steven Charles Davis