The search functionality is under construction.
The search functionality is under construction.

Verifiable Credential Proof Generation and Verification Model for Decentralized SSI-Based Credit Scoring Data

Kang Woo CHO, Byeong-Gyu JEONG, Sang Uk SHIN

  • Full Text Views

    0

  • Cite this

Summary :

The continuous development of the mobile computing environment has led to the emergence of fintech to enable convenient financial transactions in this environment. Previously proposed financial identity services mostly adopted centralized servers that are prone to single-point-of-failure problems and performance bottlenecks. Blockchain-based self-sovereign identity (SSI), which emerged to address this problem, is a technology that solves centralized problems and allows decentralized identification. However, the verifiable credential (VC), a unit of SSI data transactions, guarantees unlimited right to erasure for self-sovereignty. This does not suit the specificity of the financial transaction network, which requires the restriction of the right to erasure for credit evaluation. This paper proposes a model for VC generation and revocation verification for credit scoring data. The proposed model includes double zero knowledge - succinct non-interactive argument of knowledge (zk-SNARK) proof in the VC generation process between the holder and the issuer. In addition, cross-revocation verification takes place between the holder and the verifier. As a result, the proposed model builds a trust platform among the holder, issuer, and verifier while maintaining the decentralized SSI attributes and focusing on the VC life cycle. The model also improves the way in which credit evaluation data are processed as VCs by granting opt-in and the special right to erasure.

Publication
IEICE TRANSACTIONS on Information Vol.E104-D No.11 pp.1857-1868
Publication Date
2021/11/01
Publicized
2021/07/27
Online ISSN
1745-1361
DOI
10.1587/transinf.2021NGP0006
Type of Manuscript
Special Section PAPER (Special Section on Next-generation Security Applications and Practice)
Category

Authors

Kang Woo CHO
  Pukyong National University
Byeong-Gyu JEONG
  Pukyong National University
Sang Uk SHIN
  Pukyong National University

Keyword