Patents by Inventor Biser Dimitrov

Biser Dimitrov 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).

  • Systems and methods for enforcing cryptographically secure actions in public, non-permissioned blockchains using bifurcated self-executing programs comprising shared digital signature requirements
    Patent number: 12615160
    Abstract: Systems and methods for a bifurcated self-executing program that wraps a first self-executing program (e.g., a first smart contract) on a blockchain within a second self-executing program (e.g., a second smart contract), in which the second self-executing program enforces the digital signature requirement. The bifurcated self-executing program comprises a single compiled self-executing program that combines the first self-executing program and the second self-executing program.
    Type: Grant
    Filed: August 29, 2024
    Date of Patent: April 28, 2026
    Assignee: Citibank, N.A.
    Inventors: Shishir Singh, Jonathan Miles Collin Rosenoer, Andres Wolberg-Stok, Biser Dimitrov
  • Controlling access to cryptographic resources using double encryption
    Patent number: 12506619
    Abstract: A system for controlling access to cryptographic resources is disclosed. The system may receive a request to transfer cryptographic resources between users, including a user identifier and a first cryptographic signature. The system may verify the signature and retrieve an encrypted private key from a key vault using the user identifier. A command to sign the request may be transmitted over a private network to a signature device, which may generate a second cryptographic signature using the decrypted private key. The system may receive the second signature, generate a blockchain operation based on the request and signature, and transmit the operation to a blockchain node for commitment. The system may also handle new account generation, storing encrypted keys in jurisdiction-specific databases, and validating blockchain operations against request parameters.
    Type: Grant
    Filed: July 31, 2025
    Date of Patent: December 23, 2025
    Assignee: Citibank, N.A.
    Inventors: Biser Dimitrov, Boaz Bechar
  • Controlling access to cryptographic resources using offline storage
    Patent number: 12506605
    Abstract: A system for controlling access to cryptographic resources is disclosed. The system may receive a request to transfer cryptographic resources between users, including a user identifier and a first cryptographic signature. The system may verify the signature and retrieve an encrypted private key from a key vault using the user identifier. A command to sign the request may be transmitted over a private network to a signature device, which may generate a second cryptographic signature using the decrypted private key. The system may receive the second signature, generate a blockchain operation based on the request and signature, and transmit the operation to a blockchain node for commitment. The system may also handle new account generation, storing encrypted keys in jurisdiction-specific databases, and validating blockchain operations against request parameters.
    Type: Grant
    Filed: July 31, 2025
    Date of Patent: December 23, 2025
    Assignee: Citibank, N.A.
    Inventors: Biser Dimitrov, Boaz Bechar
  • SYSTEMS AND METHODS FOR ENFORCING CRYPTOGRAPHICALLY SECURE ACTIONS IN PUBLIC, NON-PERMISSIONED BLOCKCHAINS USING BIFURCATED SELF-EXECUTING PROGRAMS COMPRISING SHARED DIGITAL SIGNATURE REQUIREMENTS
    Publication number: 20240430102
    Abstract: Systems and methods for a bifurcated self-executing program that wraps a first self-executing program (e.g., a first smart contract) on a blockchain within a second self-executing program (e.g., a second smart contract), in which the second self-executing program enforces the digital signature requirement. The bifurcated self-executing program comprises a single compiled self-executing program that combines the first self-executing program and the second self-executing program.
    Type: Application
    Filed: August 29, 2024
    Publication date: December 26, 2024
    Applicant: Citibank, N.A.
    Inventors: Shishir Singh, Jonathan Miles Collin Rosenoer, Andres Wolberg-Stok, Biser Dimitrov
  • Systems and methods for enforcing cryptographically secure actions in public, non-permissioned blockchains using bifurcated self-executing programs comprising shared digital signature requirements
    Patent number: 12113914
    Abstract: Systems and methods for a bifurcated self-executing program that wraps a first self-executing program (e.g., a first smart contract) on a blockchain within a second self-executing program (e.g., a second smart contract), in which the second self-executing program enforces the digital signature requirement. The bifurcated self-executing program comprises a single compiled self-executing program that combines the first self-executing program and the second self-executing program.
    Type: Grant
    Filed: September 12, 2023
    Date of Patent: October 8, 2024
    Assignee: Citibank, N.A.
    Inventors: Shishir Singh, Jonathan Miles Collin Rosenoer, Andres Wolberg-Stok, Biser Dimitrov
  • SYSTEMS AND METHODS FOR ENFORCING CRYPTOGRAPHICALLY SECURE ACTIONS IN PUBLIC, NON-PERMISSIONED BLOCKCHAINS USING BIFURCATED SELF-EXECUTING PROGRAMS COMPRISING SHARED DIGITAL SIGNATURE REQUIREMENTS
    Publication number: 20240187256
    Abstract: Systems and methods for a bifurcated self-executing program that wraps a first self-executing program (e.g., a first smart contract) on a blockchain within a second self-executing program (e.g., a second smart contract), in which the second self-executing program enforces the digital signature requirement. The bifurcated self-executing program comprises a single compiled self-executing program that combines the first self-executing program and the second self-executing program.
    Type: Application
    Filed: September 12, 2023
    Publication date: June 6, 2024
    Applicant: Citibank, N.A.
    Inventors: Shishir SINGH, Jonathan Miles Collin ROSENOER, Andres WOLBERG-STOK, Biser DIMITROV
  • Systems and methods for conducting cryptographically secure actions in public, non-permissioned blockchains using bifurcated self-executing programs
    Patent number: 11956377
    Abstract: Systems and methods for a bifurcated self-executing program that wraps a first self-executing program (e.g., a first smart contract) on a blockchain within a second self-executing program (e.g., a second smart contract), in which the second self-executing program enforces the requirement for particular security credentials/certificates. The bifurcated self-executing program comprises a single compiled self-executing program that combines the first self-executing program and the second self-executing program.
    Type: Grant
    Filed: April 3, 2023
    Date of Patent: April 9, 2024
    Assignee: Citibank, N.A.
    Inventors: Shishir Singh, Jonathan Miles Collin Rosenoer, Andres Wolberg-Stok, Biser Dimitrov
  • Systems and methods for enforcing cryptographically secure actions in public, non-permissioned blockchains using bifurcated self-executing programs comprising shared digital signature requirements
    Patent number: 11770263
    Abstract: Systems and methods for a bifurcated self-executing program that wraps a first self-executing program (e.g., a first smart contract) on a blockchain within a second self-executing program (e.g., a second smart contract), in which the second self-executing program enforces the digital signature requirement. The bifurcated self-executing program comprises a single compiled self-executing program that combines the first self-executing program and the second self-executing program.
    Type: Grant
    Filed: March 24, 2023
    Date of Patent: September 26, 2023
    Assignee: Citibank, N.A.
    Inventors: Shishir Singh, Jonathan Miles Collin Rosenoer, Andres Wolberg-Stok, Biser Dimitrov
  • Systems and methods for conducting cryptographically secure actions in public, non-permissioned blockchains using bifurcated self-executing programs
    Patent number: 11658833
    Abstract: Systems and methods for a bifurcated self-executing program that wraps a first self-executing program (e.g., a first smart contract) on a blockchain within a second self-executing program (e.g., a second smart contract), in which the second self-executing program enforces the requirement for particular security credentials/certificates. The bifurcated self-executing program comprises a single compiled self-executing program that combines the first self-executing program and the second self-executing program.
    Type: Grant
    Filed: December 6, 2022
    Date of Patent: May 23, 2023
    Assignee: Citibank, N.A.
    Inventors: Shishir Singh, Jonathan Miles Collin Rosenoer, Andres Wolberg-Stok, Biser Dimitrov