Patents by Inventor Steven C. Davis

Steven C. Davis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230022769
    Abstract: 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.
    Type: Application
    Filed: October 5, 2022
    Publication date: January 26, 2023
    Inventor: Steven C. DAVIS
  • Publication number: 20230006882
    Abstract: 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.
    Type: Application
    Filed: September 12, 2022
    Publication date: January 5, 2023
    Inventor: Steven C. DAVIS
  • Patent number: 11516001
    Abstract: 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.
    Type: Grant
    Filed: February 16, 2021
    Date of Patent: November 29, 2022
    Assignee: MASTERCARD INTERNATIONAL INCORPORATED
    Inventors: Steven C. Davis, Rob Byrne, Robert Collins, Leandro Nunes Da Silva Carvalho, Deborah Eleanor Barta
  • Publication number: 20220366407
    Abstract: The present disclosure provides a description of systems and methods for verifying product authenticity at a point of sale through transaction messages. A point of sale may collect product identifiers from products that a consumer is interested in purchase as part of a traditional checkout process. Product identifiers can be included in special data elements in a transaction message that is submitted to a merchant's acquiring bank through for the payment transaction. As part of the processing of the transaction by the acquirer, the acquirer can consult a processor to check the authenticity of the products being purchased by examining a provenance blockchain for the product identifiers included in the transaction message. If the products are determined to be authentic, the transaction can proceed as normal. If the products are not authentic, then the acquirer can deny the transaction and stop the consumer from purchasing a counterfeit or fraudulent good.
    Type: Application
    Filed: May 13, 2021
    Publication date: November 17, 2022
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventors: Robert COLLINS, Steven C. DAVIS, Rob BYRNE, Peter J. GROARKE
  • Publication number: 20220360430
    Abstract: A method for maintaining a consistent blockchain ledger for storing commitments across multiple separate blockchains includes: storing a blockchain comprised of a plurality of blocks, each block including at least a block header and one or more blockchain data values; receiving a base commitment from a first node, where the first node is included in a first blockchain network; generating a first new block including at least a first block header and the received base commitment; storing the first new block in the blockchain; receiving a state commitment from an additional node included in each of at least two additional blockchain networks; generating an additional new block including at least an additional block header and each received state commitment; and storing the additional new block in the blockchain.
    Type: Application
    Filed: July 27, 2022
    Publication date: November 10, 2022
    Inventors: Steven C. DAVIS, Rakesh YADAV
  • Patent number: 11477084
    Abstract: 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.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: October 18, 2022
    Assignee: MASTERCARD INTERNATIONAL INCORPORATED
    Inventor: Steven C. Davis
  • Patent number: 11444787
    Abstract: A method for propagating configuration data using a blockchain includes: storing a blockchain comprised of a plurality of blocks, each being comprised of a block header having a timestamp and one or more configuration transactions; receiving one or more configuration data items; generating a new configuration transaction for each configuration data item; hashing a most recent block identified based on the timestamp included in the respective block header to generate a previous block hash value; hashing a combination of the new configuration transactions and/or data associated therewith to generate a current block hash value; generating a new block header, the new block header including a current timestamp, the previous block hash value, the current block hash value, and a digital signature; generating a new block comprised of the new block header and each new configuration transaction; and updating the blockchain by appending the new block.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: September 13, 2022
    Assignee: MASTERCARD INTERNATIONAL INCORPORATED
    Inventors: Simon R. Dix, Steven C. Davis
  • Publication number: 20220286275
    Abstract: 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.
    Type: Application
    Filed: March 4, 2021
    Publication date: September 8, 2022
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventor: Steven C. DAVIS
  • Patent number: 11431473
    Abstract: A method for maintaining a consistent blockchain ledger for storing commitments across multiple separate blockchains includes: storing a blockchain comprised of a plurality of blocks, each block including at least a block header and one or more blockchain data values; receiving a base commitment from a first node, where the first node is included in a first blockchain network; generating a first new block including at least a first block header and the received base commitment; storing the first new block in the blockchain; receiving a state commitment from an additional node included in each of at least two additional blockchain networks; generating an additional new block including at least an additional block header and each received state commitment; and storing the additional new block in the blockchain.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: August 30, 2022
    Assignee: MASTERCARD INTERNATIONAL INCORPORATED
    Inventors: Steven C. Davis, Rakesh Yadav
  • Publication number: 20220138172
    Abstract: 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.
    Type: Application
    Filed: January 19, 2022
    Publication date: May 5, 2022
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventor: Steven C. DAVIS
  • Publication number: 20220141018
    Abstract: A method for addition of a block to a permissioned blockchain using efficient consensus includes: storing a blockchain; receiving transaction messages having transaction values from consensus nodes; generating a Merkle root for the transactions messages using transaction references; generating a proposed block header having the Merkle root and a hash of the header of the most recently added block in the blockchain; hashing the proposed block header; transmitting a proposal message having a digital signature and the hashed proposed block header to auditing nodes; receiving a response message accepting the digital signature from a majority of auditing nodes; transmitting an accept message to the auditing nodes; transmitting a confirmation message to the consensus nodes including the hashed proposed block header and digital signature; and writing a new block to the blockchain having the transaction values from the transaction messages and a header including the proposed block header and digital signature.
    Type: Application
    Filed: January 20, 2022
    Publication date: May 5, 2022
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventor: Steven C. DAVIS
  • Publication number: 20220067711
    Abstract: 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.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 3, 2022
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventors: Donghao Huang, Hancong Guan, Srinath Ravinathan, Mohammed Sadiq Ahmad, Rajasekaran Dhamodharan, Steven C. Davis, Rakesh Yadav, Sébastien Le Callonnec, David James Fleming
  • Publication number: 20220019503
    Abstract: A method for recovery of missing or extra data using a bloom filter includes: storing a plurality of transaction messages, each including a transaction value; generating a bloom filter of the transaction messages, the bloom filter being generated using a number of hash rounds and with a size at least double the number of transaction messages; generating a recover message including the number of transaction messages, the number of hash rounds, the size, and the generated bloom filter; transmitting the recover message to a consensus node; receiving a response message from the consensus node, the response message including at least one additional transaction message; and inserting the at least one additional transaction message into the plurality of transaction messages.
    Type: Application
    Filed: September 30, 2021
    Publication date: January 20, 2022
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventor: Steven C. DAVIS
  • Publication number: 20210406881
    Abstract: 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.
    Type: Application
    Filed: September 14, 2021
    Publication date: December 30, 2021
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventors: Rakesh YADAV, Steven C. DAVIS
  • Publication number: 20210336768
    Abstract: A method for generation of blocks for a partitioned blockchain includes: storing blocks comprising a partitioned blockchain, wherein each block includes a header and transaction entries; receiving transaction data entries for each of a plurality of subnets; generating a hash value of the header included in the most recently added block; generating a new block header, the new block header including the generated hash value, a timestamp, and a sequence of pairs including a pair for each of the plurality of subnets, each pair including a subnet identifier associated with the respective subnet and a merkle root of each of the transaction data entries received for the respective subnet; generating a new block, the new block including the generated new block header and the transaction data entries for each of the plurality of subnets; and transmitting the new block to a plurality of nodes associated with the partitioned blockchain.
    Type: Application
    Filed: July 2, 2021
    Publication date: October 28, 2021
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventor: Steven C. DAVIS
  • Publication number: 20210295330
    Abstract: A method and system for representing scalar digital assets using hash chains may include a processor which may receive a data request for one or more units of a scalar digital asset from a computing device. The processor may identify the scalar digital asset requested by the computing device and the one or more units of the scalar digital asset. The processor may verify the computing device has access to the scalar digital asset. The processor may generate a hash chain of the one or more units of the scalar digital asset and transmit a data response message containing the hash chain of the one or more units of the scalar digital asset to the computing device.
    Type: Application
    Filed: March 17, 2021
    Publication date: September 23, 2021
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventor: Steven C. DAVIS
  • Publication number: 20210281427
    Abstract: 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.
    Type: Application
    Filed: May 11, 2021
    Publication date: September 9, 2021
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventors: Steven C. DAVIS, Paul TAYLOR, Eduardo ANDRADE
  • Publication number: 20210182869
    Abstract: 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.
    Type: Application
    Filed: February 16, 2021
    Publication date: June 17, 2021
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventors: Steven C. DAVIS, Rob BYRNE, Robert COLLINS, Leandro NUNES DA SILVA CARVALHO, Deborah Eleanor BARTA
  • Publication number: 20210182861
    Abstract: 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 pers
    Type: Application
    Filed: March 2, 2021
    Publication date: June 17, 2021
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventor: Steven C. DAVIS
  • Publication number: 20210174346
    Abstract: 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.
    Type: Application
    Filed: December 6, 2019
    Publication date: June 10, 2021
    Applicant: MASTERCARD INTERNATIONAL INCORPORATED
    Inventors: Sarala BURADAGUNTA, Rakesh YADAV, Dmytro KRYVOSHEI, Steven C. DAVIS, Sébastien LE CALLONNEC