Patents by Inventor Tapas Pal

Tapas Pal 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).

  • COMPACT FUNCTIONAL ENCRYPTION FOR UNBOUNDED ATTRIBUTE-WEIGHTED SUMS
    Publication number: 20260189379
    Abstract: Techniques are disclosed relating to functional encryption schemes for attribute-weighted sum (AWS) functionality that support the uniform model of computation. In some embodiments, a device is configured for encrypting for a functional encryption scheme in the public key setting supporting multiple secret keys and multiple ciphertexts. In some embodiments the disclosed techniques may support both public and private attributes of arbitrary lengths.
    Type: Application
    Filed: November 6, 2023
    Publication date: July 2, 2026
    Applicant: NTT Research, Inc.
    Inventors: Pratish DATTA, Tapas PAL
  • Decentralized multi-authority attribute-based inner-product functional encryption
    Patent number: 12395321
    Abstract: A decentralized multi-authority attribute-based inner-product functional encryption FE (MA-ABIPFE) scheme in the prime-order bilinear groups under target-group-based assumptions is used for encryption. In some embodiments, any party can become an authority and there is no requirement for any global coordination other than the creation of an initial set of common reference parameters.
    Type: Grant
    Filed: March 30, 2023
    Date of Patent: August 19, 2025
    Assignee: NTT Research, Inc.
    Inventors: Pratish Datta, Monosij Maitra, Tapas Pal
  • COMPACT ADAPTIVELY SECURE FUNCTIONAL ENCRYPTION FOR ATTRIBUTE-WEIGHTED SUMS
    Publication number: 20240396729
    Abstract: Adaptively simulation secure functional encryption systems, methods, network devices, and machine-readable media for attribute-weighted sums are implemented. A secret key corresponds to some weight function ƒ, and decryption recovers a weighted sum. The schemes are built upon asymmetric bilinear groups of prime order and the security is derived under the standard (bilateral) k-Linear (k-Lin) assumption.
    Type: Application
    Filed: August 5, 2022
    Publication date: November 28, 2024
    Applicant: NTT RESEARCH, INC.
    Inventors: Pratish DATTA, Tapas PAL
  • Decentralized Multi-Authority Attribute-Based Inner-Product Functional Encryption
    Publication number: 20230353346
    Abstract: A decentralized multi-authority attribute-based inner-product functional encryption FE (MA-ABIPFE) scheme in the prime-order bilinear groups under target-group-based assumptions is used for encryption. In some embodiments, any party can become an authority and there is no requirement for any global coordination other than the creation of an initial set of common reference parameters.
    Type: Application
    Filed: March 30, 2023
    Publication date: November 2, 2023
    Applicant: NTT Research, Inc.
    Inventors: Pratish Datta, Monosij Maitra, Tapas Pal