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Related Experiment Video

Updated: Nov 9, 2025

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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Obfuscating encrypted threshold signature algorithm and its applications in cloud computing.

Yahong Li1,2, Jianzhou Wei3, Bin Wu4

  • 1School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China.

Plos One
|April 16, 2021
PubMed
Summary

This study introduces secure cloud data privacy using program obfuscation for encrypted threshold signatures. It protects user data by outsourcing signing rights without revealing sensitive information.

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Last Updated: Nov 9, 2025

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Area of Science:

  • Computer Science
  • Cryptography
  • Cloud Security

Background:

  • Cloud computing poses risks to user data privacy due to unencrypted data transmission to untrusted providers.
  • Sensitive user data is vulnerable to leaks by cloud service providers.
  • Program obfuscation offers potential solutions for enhancing cloud security.

Purpose of the Study:

  • To construct an encrypted threshold signature functionality for secure outsourcing of signing rights in cloud environments.
  • To ensure that sensitive user information is not revealed during the outsourcing process.
  • To leverage program obfuscation for enhanced data privacy in cloud computing.

Main Methods:

  • Developed an encrypted threshold signature scheme utilizing program obfuscation.
  • Proved the obfuscator's security properties, including average-case virtual black box (VBB) and existential unforgeability.
  • Demonstrated security under the decisional linear (DLIN) and computational Diffie-Hellman (CDH) assumptions in the standard model.

Main Results:

  • Successfully constructed a secure encrypted threshold signature functionality.
  • The scheme securely outsources threshold signing rights to the cloud server.
  • The obfuscator meets rigorous security standards (VBB, DLIN, CDH).

Conclusions:

  • The proposed scheme effectively safeguards user data privacy in cloud computing.
  • Program obfuscation is a viable technique for enhancing security in outsourced computations.
  • The practical implementation using Java pairing-based cryptography library demonstrates feasibility.