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A Key-Policy Attribute-Based Proxy Re-Encryption Without Random Oracles.
- Source :
-
Computer Journal . Jul2016, Vol. 59 Issue 7, p970-982. 13p. - Publication Year :
- 2016
-
Abstract
- A conditional proxy re-encryption (CPRE) scheme enables the proxy to convert a ciphertext from Alice to Bob, if the ciphertext satisfies one condition set by Alice. To improve the issue of more fine-grained on the condition set, Fang, Wang, Ge and Ren proposed a new primitive named Interactive conditional PRE with fine grain policy (ICPRE-FG) in 2011, and left an open problem on how to construct CCA-secure ICPRE-FG without random oracles. In this paper, we answer this open problem affirmatively by presenting a new construction of CCA-secure key-policy attribute-based PRE (KP-ABPRE) without random oracles. In this paper, we enhance the security model of Fang's ICPRE-FG scheme by allowing the adversary to make some extra queries, which do not help them win the game trivially. Finally, we present a CCA-secure KP-ABPRE without random oracles under the 3-weak decisional bilinear Diffie-Hellman inversion(3-wDBDHI) assumption. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00104620
- Volume :
- 59
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Computer Journal
- Publication Type :
- Academic Journal
- Accession number :
- 117091684
- Full Text :
- https://doi.org/10.1093/comjnl/bxv100