Title
Adaptable ciphertext-policy attribute-based encryption
Publication Type
Conference Proceeding Article
Publication Date
11-2013
Abstract
In this paper, we introduce a new cryptographic primitive, called adaptable ciphertext-policy attribute-based encryption (CP-ABE). Adaptable CP-ABE extends the traditional CP-ABE by allowing a semi-trusted proxy to modify a ciphertext under one access policy into ciphertexts of the same plaintext under any other access policies; the proxy, however, learns nothing about the underlying plaintext. With such “adaptability” possessed by the proxy, adaptable CP-ABE has many real world applications, such as handling policy changes in CP-ABE encryption of cloud data and outsourcing of CP-ABE encryption. Specifically, we first specify a formal model of adaptable CP-ABE; then, based on the CP-ABE scheme by Waters, we propose a concrete adaptable CP-ABE scheme and further prove its security under our security model.
Keywords
Ciphertext, Policy attribute. Based encryption, Adaptability, Policy change
Discipline
Information Security
Research Areas
Information Security and Trust
Publication
Pairing-Based Cryptography - Pairing 2013: 6th International Conference, Beijing, China, November 22-24: Revised Selected Papers
Volume
8365
First Page
199
Last Page
214
ISBN
9783319048734
Identifier
10.1007/978-3-319-04873-4_12
Publisher
Springer Verlag
City or Country
Beijing, China
Citation
LAI, Junzuo; DENG, Robert H.; YANG, Yanjiang; and Weng, Jian.
Adaptable ciphertext-policy attribute-based encryption. (2013). Pairing-Based Cryptography - Pairing 2013: 6th International Conference, Beijing, China, November 22-24: Revised Selected Papers. 8365, 199-214. Research Collection School Of Information Systems.
Available at: http://ink.library.smu.edu.sg/sis_research/1950
Additional URL
http://dx.doi.org/10.1007/978-3-319-04873-4_12