Publication Type
Conference Proceeding Article
Version
publishedVersion
Publication Date
6-2011
Abstract
In ciphertext-policy attributed-based encryption (CP-ABE), each ciphertext is labeled by the encryptor with an access structure (also called ciphertext policy) and each private key is associated with a set of attributes. A user should be able to decrypt a ciphertext if and only if his private key attributes satisfy the access structure.The traditional security property of CP-ABE is plaintext privacy, which ciphertexts reveal no information about the underlying plaintext. At ACNS’08, Nishide, Yoneyama and Ohta introduced the notion of ciphertext-policy hiding CP-ABE. In addition to protecting the privacy of plaintexts, ciphertext-policy hiding CP-ABE also protects the description of the access structures associated with ciphertexts. They observed that ciphertext-policy hiding CP-ABE can be constructed from attribute-hiding inner-product predicate encryption (PE), and presented two constructions of ciphertext-policy hiding CP-ABE supporting restricted access structures, which can be expressed as AND gates on multi-valued attributes with wildcards. However, their schemes were only proven selectively secure.In this paper, we first describe the construction of ciphertext-policy hiding CP-ABE from attribute-hiding inner-product PE formally. Then, we propose a concrete construction of ciphertext-policy hiding CP-ABE supporting the same access structure as that of Nishide, Yoneyama and Ohta, but our scheme is proven fully secure.
Keywords
Ciphertext Policy Attribute-Based Encryption, Predicate Encryption, Dual System Encryption
Discipline
Information Security
Research Areas
Cybersecurity
Publication
Information Security Practice and Experience: 7th International Conference, ISPEC 2011, Guangzhou, China, May 30 - June 1: Proceedings
Volume
6672
First Page
24
Last Page
39
ISBN
9783642210310
Identifier
10.1007/978-3-642-21031-0_3
Publisher
Springer Verlag
City or Country
Heidelberg
Citation
LAI, Junzuo; DENG, Robert H.; and LI, Yingjiu.
Fully Secure Cipertext-Policy Hiding CP-ABE. (2011). Information Security Practice and Experience: 7th International Conference, ISPEC 2011, Guangzhou, China, May 30 - June 1: Proceedings. 6672, 24-39.
Available at: https://ink.library.smu.edu.sg/sis_research/1416
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Additional URL
http://dx.doi.org/10.1007/978-3-642-21031-0_3
Comments
Lecture Notes in Computer Science, 2011, Volume 6672/2011, 24-39