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Related Experiment Video

Updated: Sep 29, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Traceable Scheme of Public Key Encryption with Equality Test.

Huijun Zhu1,2,3, Qingji Xue1,3, Tianfeng Li1,3

  • 1School of Digital Media and Art Design, Nanyang Institute of Technology, Nanyang 473004, China.

Entropy (Basel, Switzerland)
|March 25, 2022
PubMed
Summary

This study introduces ciphertext traceability to public key encryption with equality test (PKEwET) schemes. The new PKEwET scheme supports equality tests and traceability, enhancing security for cloud computing and blockchain applications.

Keywords:
blockchaincloud serverequality testpublic key encryption

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Area of Science:

  • Cryptography
  • Information Security
  • Computer Science

Background:

  • Public key encryption supporting equality test (PKEwET) schemes are vital for cloud computing, blockchain, and IoT.
  • Existing PKEwET schemes lack ciphertext traceability, limiting their application scope.
  • Prior enhancements added authorization but not traceability.

Purpose of the Study:

  • To introduce ciphertext traceability into PKEwET schemes.
  • To develop a PKEwET scheme with both equality testing and traceability functionalities.
  • To analyze the security and performance of the proposed scheme.

Main Methods:

  • Integration of ciphertext traceability into the PKEwET framework.
  • Security analysis using a game-based approach between an adversary and a simulator.
  • Performance evaluation of the developed scheme.

Main Results:

  • A novel PKEwET scheme with integrated ciphertext traceability is presented.
  • The scheme supports both equality tests and traceability for ciphertexts.
  • Security analysis demonstrates OW-CCA security with a trapdoor and IND-CCA security without a trapdoor.

Conclusions:

  • The proposed PKEwET scheme enhances security and functionality for data privacy.
  • Traceability in PKEwET schemes offers improved accountability in distributed systems.
  • The scheme provides a desirable balance of security, functionality, and performance.