Journal's Facebook pageImproved Functional Proxy Re-encryption Schemes for Secure Cloud Data Sharing
- Key Laboratory of Information and Network Security, Engineering University of Chinese Armed Police Force
P. R. China - Guangxi Key Laboratory of Cryptography and Information Security, Guilin University of Electronic Technology
P. R. China
wangxazjd@163.com, xyyangwj@126.com, wugongcong@163.com, 1269124170@qq.com, 284722748@qq.com
Abstract
Recently Liang et al. propose an interesting privacy-preserving ciphertext multi-sharing control for big data storage mechanism, which is based on the cryptographic primitive of anonymous multi-hop identity based conditional proxy re-encryption scheme AMH-IBCPRE. They propose a concrete AMH-IBCPRE scheme and conclude their scheme can achieve IND-sCon-sID-CCA secure (indistinguishable secure under selectively conditional selectively identity chosen ciphertext attack). However, our research show their scheme can not be IND-sConsID-CCA secure for single-hop and multi-hop data sharing. Also in 2014, Liang et al. propose an interesting deterministic finite automata-based functional proxy reencryption scheme DFA-based FPRE for secure public cloud data sharing, they also conclude their scheme can achieve IND-CCA secure (indistinguishable secure under chosen ciphertext attack), we also show their scheme can not be IND-CCA secure either. For these two proposals, the main reason of insecurity is that part of the re-encryption key has the same structure as the valid ciphertext, thus the adversary can query on the decryption oracle with this part of the re-encryption key to get secret keys, which will break the CCA-security of their scheme.We give an improved AMH-IBCPRE scheme and an improved DFA-based FPRE scheme for cloud data sharing and show the new schemes can resist our attack and be CCA-secure.We also demonstrate our improved AMH-IBCPRE scheme’s efficiency compared with other related identity based proxy re-encryption schemes, the results show our scheme is almost the most efficient one.
Key words
Attack, multi-control for big data storage, secure cloud data sharing, proxy re-encryption, chosen ciphertext security
Digital Object Identifier (DOI)
https://doi.org/10.2298/CSIS171218024W
Publication information
Volume 15, Issue 3 (October 2018)
Year of Publication: 2018
ISSN: 2406-1018 (Online)
Publisher: ComSIS Consortium
Full text
Available in PDF
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How to cite
Wang, X. A., Yang, X., Li, C., Liu, Y., Ding, Y.: Improved Functional Proxy Re-encryption Schemes for Secure Cloud Data Sharing. Computer Science and Information Systems, Vol. 15, No. 3, 585–614. (2018), https://doi.org/10.2298/CSIS171218024W
