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Design and Implementation of a Privacy-Preserving System Based on Zero-Knowledge Proofs and Blockchain Mechanism

  • Journal of Internet of Things and Convergence
  • Abbr : JKIOTS
  • 2025, 11(6), 15
  • Publisher : The Korea Internet of Things Society
  • Research Area : Engineering > Computer Science > Internet Information Processing
  • Received : October 21, 2025
  • Accepted : December 16, 2025
  • Published : December 31, 2025

Lee, Hyung Woo 1

1한신대학교

Accredited

ABSTRACT

The rapid progress of digital transformation has expanded the scope and application of personal privacy data across diverse industry sectors, creating a growing demand for secure mechanisms for data storage, management, and verification. Traditional centralized personal privacy information authentication models remain vulnerable to data breaches, unauthorized tracking, and excessive reliance on service providers as trusted entities. To overcome these limitations, this study proposes a privacy-preserving personal data protection system that integrates Zero-Knowledge Proofs(ZKP) with blockchain technology. The proposed approach enables users to prove specific attributes without exposing sensitive personal information while ensuring integrity, trace resistance, and decentralized trust through blockchain. The system incorporates a ZKP-based authentication protocol, a blockchain structure for public-key storage, an on-chain/off-chain hybrid data management model, and a username-based public-key retrieval mechanism. A prototype implementation demonstrates effective data minimization, improved integrity assurance, and enhanced anonymity. The results indicate that the proposed framework can be extended to various domains, including decentralized identity (DID) systems and public-sector digital services.

Citation status

* References for papers published after 2024 are currently being built.