Privacy-aware PKI model with strong forward security

Fengyin Li, Zhongxing Liu, Tao Li, Hongwei Ju, Hua Wang, Huiyu Zhou*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


With the development of network technology, privacy protection and users anonymity become a new research hotspot. The existing blockchain privacy-aware public key infrastructure (PKI) model can ensure the privacy of users in the authentication process to a certain extent, but there are still problems of the storage and leakage of users' keys. This paper first proposes a strong forward-secure ring signature scheme based on RSA, which ensures the anonymity of the signing users and the forward-backward security of the keys. Then, by introducing the ring signature technology into the privacy-aware PKI model, this paper proposes a privacy-aware PKI model with strong forward security based on block chains, which not only ensures the users' identity privacy, but also solves the problem of the storage and leakage of the users' keys, greatly improving the success rate and security of the users' identity authentication. Finally, this paper applies the proposed PKI model to anonymous transactions, designs a privacy-aware anonymous transaction model with strong forward security, realizing anonymous transactions without relying on trusted third parties, and implementing users' privacy protection.

Original languageEnglish
JournalInternational Journal of Intelligent Systems
Early online date30 Aug 2020
Publication statusEarly online date - 30 Aug 2020
Externally publishedYes

Bibliographical note

Funding Information:
This study was partly funded by EU Horizon 2020 DOMINOES Project (grant number: 771066) and CERNET Innovation Project (NGII20181201).

Publisher Copyright:
© 2020 Wiley Periodicals LLC

Copyright 2020 Elsevier B.V., All rights reserved.


  • anonymous transactions
  • blockchain
  • PKI
  • ring signature
  • RSA

ASJC Scopus subject areas

  • Software
  • Theoretical Computer Science
  • Human-Computer Interaction
  • Artificial Intelligence


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