Publication Type
Conference Proceeding Article
Publication Date
9-2009
Abstract
Recently, a variant of proxy re-encryption, named conditional proxy re-encryption (C-PRE), has been introduced. Compared with traditional proxy re-encryption, C-PRE enables the delegator to implement fine-grained delegation of decryption rights, and thus is more useful in many applications. In this paper, based on a careful observation on the existing definitions and security notions for C-PRE, we re-formalize more rigorous definition and security notions for C-PRE. We further propose a more efficient C-PRE scheme, and prove its chosen-ciphertext security under the decisional bilinear Diffie-Hellman (DBDH) assumption in the random oracle model. In addition, we point out that a recent C-PRE scheme fails to achieve the chosen-ciphertext security.
Keywords
Conditional proxy re-encryption, chosen-ciphertext security, random oracle
Discipline
Information Security
Research Areas
Cybersecurity
Publication
Information Security: 12th International Conference, ISC 2009, Pisa, Italy, September 7-9, 2009: Proceedings
Volume
5735
First Page
151
Last Page
166
ISBN
9783642044731
Identifier
10.1007/978-3-642-04474-8_13
Publisher
Springer Verlag
City or Country
Berlin
Citation
WENG, Jian; YANG, Yanjiang; TANG, Qiang; and DENG, Robert H..
Efficient Conditional Proxy Re-Encryption with Chosen-Ciphertext Security. (2009). Information Security: 12th International Conference, ISC 2009, Pisa, Italy, September 7-9, 2009: Proceedings. 5735, 151-166.
Available at: https://ink.library.smu.edu.sg/sis_research/476
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Additional URL
http://doi.org/10.1007/978-3-642-04474-8_13