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Blockchain-based Privacy-Preserving Group Data Auditing with Secure User Revocation

Yining Qi1,2,*, Yubo Luo3, Yongfeng Huang1,2, Xing Li1,2
1 Tsinghua University, Beijing, 100084, China
2 Beijing National Research Center for Information Science and Technology, Beijing, 100084, China
3 University of North Carolina at Chapel Hill, North Carolina, 27599, USA
* Corresponding Author: Yining Qi. Email:

Computer Systems Science and Engineering 2023, 45(1), 183-199. https://doi.org/10.32604/csse.2023.031030

Received 08 April 2022; Accepted 25 May 2022; Issue published 16 August 2022

Abstract

Progress in cloud computing makes group data sharing in outsourced storage a reality. People join in group and share data with each other, making team work more convenient. This new application scenario also faces data security threats, even more complex. When a user quit its group, remaining data block signatures must be re-signed to ensure security. Some researchers noticed this problem and proposed a few works to relieve computing overhead on user side. However, considering the privacy and security need of group auditing, there still lacks a comprehensive solution to implement secure group user revocation, supporting identity privacy preserving and collusion attack resistance. Aiming at this target, we construct a concrete scheme based on ring signature and smart contracts. We introduce linkable ring signature to build a kind of novel meta data for integrity proof enabling anonymous verification. And the new meta data supports secure revocation. Meanwhile, smart contracts are using for resisting possible collusion attack and malicious re-signing computation. Under the combined effectiveness of both signature method and blockchain smart contracts, our proposal supports reliable user revocation and signature re-signing, without revealing any user identity in the whole process. Security and performance analysis compared with previous works prove that the proposed scheme is feasible and efficient.

Keywords

Provable data possession; data integrity; blockchain; ring signature

Cite This Article

Y. Qi, Y. Luo, Y. Huang and X. Li, "Blockchain-based privacy-preserving group data auditing with secure user revocation," Computer Systems Science and Engineering, vol. 45, no.1, pp. 183–199, 2023.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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