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Thévenin's theorem plays a pivotal role in electrical circuit analysis, offering a solution to the challenges posed by variable loads within a circuit. In practical applications, it is common to encounter circuits where certain elements remain fixed while others fluctuate, often referred to as the "load." A typical household electrical outlet serves as a prime example of a variable load, as it can be connected to a variety of appliances, each with its own unique electrical...
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Identity-Based Provable Data Possession with Designated Verifier from Lattices for Cloud Computing.

Mengdi Zhao1, Huiyan Chen1

  • 1Beijing Electronic Science and Technology Institute, Beijing 100070, China.

Entropy (Basel, Switzerland)
|July 29, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a new identity-based provable data possession (PDP) scheme using lattices. It offers enhanced security against quantum attacks and balances functionality, security, and efficiency for cloud storage verification.

Keywords:
designated verifierlatticeleveled identity-based fully homomorphic signatureprovable data possession

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Area of Science:

  • Cryptography
  • Cloud Computing Security
  • Lattice-based Cryptography

Background:

  • Provable Data Possession (PDP) verifies cloud data integrity without downloading.
  • Existing PDP schemes face privacy risks (public verification) or complexity (private verification).
  • Many current PDP schemes are vulnerable to quantum attacks due to classical assumptions.

Purpose of the Study:

  • To propose a novel identity-based PDP scheme with a designated verifier over lattices.
  • To enhance security, particularly against quantum adversaries.
  • To achieve a practical balance between functionality, security, and efficiency.

Main Methods:

  • Utilized a specially leveled identity-based fully homomorphic signature (IB-FHS) scheme.
  • Developed a scheme based on lattice problems: small-integer solution (SIS) and learning with errors (LWE).
  • Provided a formal security proof within the random oracle model.

Main Results:

  • The proposed scheme offers security guarantees under SIS and LWE assumptions.
  • Theoretical analysis indicates practical feasibility.
  • Experimental simulations show manageable computation times for core algorithms (TagGen, GenProof, CheckProof).

Conclusions:

  • The proposed lattice-based identity-based PDP scheme provides enhanced security and privacy.
  • It addresses limitations of existing PDP schemes, including quantum vulnerability.
  • The scheme achieves a favorable trade-off between advanced features, robust security, and operational efficiency.