Highly Efficient Proxy Re-encryption Schemes for User-End Encrypted Cloud Data Sharing

2016 ◽  
Author(s):  
Xing Hu ◽  
Chunming Tang ◽  
Duncan S. Wong
Keyword(s):  
Data Sharing ◽  
Cloud Data ◽  
Highly Efficient ◽  
Encryption Schemes

scholarly journals Improved functional proxy re-encryption schemes for secure cloud data sharing

2018 ◽  
Vol 15 (3) ◽  
pp. 585-614 ◽  
Author(s):  
Xu Wang ◽  
Xiaoyuan Yang ◽  
Cong Li ◽  
Yudong Liu ◽  
Yong Ding
Keyword(s):  
Data Sharing ◽  
Data Storage ◽  
Finite Automata ◽  
Cloud Data ◽  
Storage Mechanism ◽  
Cryptographic Primitive ◽  
Encryption Schemes ◽  
Secret Keys ◽  
Identity Based ◽  
Chosen Ciphertext Attack

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.

Efficient and provably-secure certificateless proxy re-encryption scheme for secure cloud data sharing

2014 ◽  
Vol 19 (4) ◽  
pp. 398-405 ◽  
Author(s):  
Liang-liang Wang ◽  
Ke-fei Chen ◽  
Xian-ping Mao ◽  
Yong-tao Wang
Keyword(s):  
Data Sharing ◽  
Encryption Scheme ◽  
Cloud Data ◽  
Provably Secure
Sign in / Sign up

Export Citation Format

Share Document