ISSN 1000-1239 CN 11-1777/TP

Journal of Computer Research and Development ›› 2016, Vol. 53 ›› Issue (10): 2334-2342.doi: 10.7544/issn1000-1239.2016.20160429

Special Issue: 2016网络空间共享安全研究进展专题

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Privacy-Preserving Public Auditing for Dynamic Group Based on Hierarchical Tree

Huang Longxia, Zhang Gongxuan, Fu Anmin   

  1. (School of Computer Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094)
  • Online:2016-10-01

Abstract: As the rapid development of cloud storage, it is important to protect the security of shared data in cloud. Therefore, it is necessary to protect users’ privacy and verify the integrity of data efficiently during the data sharing. As the existing schemes consider little about the management and secure distribution of key, based on hierarchy tree and proxy re-signature, a privacy-preserving public auditing scheme which supports dynamic group in cloud storage is supposed. The proposed scheme firstly uses logical hierarchy key tree to establish and distribute keys, and a key server is utilized to store keys. The revocation of user is independent from users’ obtaining new group secret key as each user only stores the leaf node key. When a user revokes, the valid user can obtain the new group secret key with their original keys. Therefore, the scheme is more efficient for dynamic group. The security analysis and performance analysis show that the scheme is secure and efficient.

Key words: privacy preserving, dynamic group, public auditing, hierarchical tree, re-signature

CLC Number: