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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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A compact public key encryption with equality test for lattice in cloud computing.

Junfei He1, Qing Ye1, Zhichao Yang2

  • 1Department of Information Security, Naval University of Engineering, Wuhan, China.

Scientific Reports
|July 28, 2025
PubMed
Summary

A new compact public key encryption with equality test (PKEET) scheme offers enhanced security for cloud computing. This post-quantum cryptography solution is more efficient, reducing storage and computation costs by approximately half.

Keywords:
Cloud computingEquality testLattice-based cryptographyLearning with errorsPublic key encryption

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Area of Science:

  • Computer Science
  • Cryptography
  • Cloud Computing Security

Background:

  • Cloud computing offers resource sharing and storage but faces security and privacy challenges.
  • Public key encryption with equality test (PKEET) allows ciphertext comparison without decryption, aiding encrypted data operations.
  • Post-quantum cryptography is crucial for securing cloud services against quantum computing threats, yet efficient implementation remains difficult.

Purpose of the Study:

  • To propose a compact and efficient public key encryption with equality test (PKEET) scheme.
  • To ensure the security of the proposed PKEET scheme in a post-quantum environment.
  • To evaluate the performance and applicability of the new PKEET scheme in cloud computing.

Main Methods:

  • Developed a novel PKEET scheme that embeds plaintext hash values into the test trapdoor.
  • Demonstrated the one-way security of the construction under the quantum security model.
  • Analyzed the scheme's resilience against chosen ciphertext attacks based on the learning with errors (LWE) assumption.

Main Results:

  • The proposed PKEET scheme requires approximately half the storage space of previous schemes.
  • Encryption and decryption stages show an almost 50% reduction in computing cost.
  • The scheme is proven secure under the quantum security model and withstands chosen ciphertext attacks.

Conclusions:

  • The new PKEET scheme is cost-effective, compact, and suitable for cloud computing.
  • It provides a practical solution for data security and privacy in the post-quantum era.
  • The scheme enhances the efficiency of secure data operations in cloud environments.