Publication Type
Journal Article
Version
publishedVersion
Publication Date
1-2018
Abstract
Functional encryption (FE) is a vast new paradigm for encryption scheme which allows tremendous flexibility in accessing encrypted data. In a FE scheme, a user can learn specific function of encrypted messages by restricted functional key and reveals nothing else about the messages. Besides the standard notion of data privacy in FE, it should protect the privacy of the function itself which is also crucial for practical applications. In this paper, we construct a secret key FE scheme for the inner product functionality using asymmetric bilinear pairing groups of prime order. Compared with the existing similar schemes, our construction reduces both necessary storage and computational complexity by a factor of 2 or more. It achieves simulation-based security, security strength which is higher than that of indistinguishability-based security, against adversaries who get hold of an unbounded number of ciphertext queries and adaptive secret key queries under the External Decisional Linear (XDLIN) assumption in the standard model. In addition, we implement the secret key inner product scheme and compare the performance with the similar schemes.
Discipline
Information Security
Research Areas
Cybersecurity
Publication
Security and Communication Networks
Volume
2018
Issue
1
First Page
1
Last Page
12
ISSN
1939-0114
Identifier
10.1155/2018/6561418
Publisher
Wiley
Citation
ZHAO, Qingsong; ZENG, Qingkai; and LIU, Ximeng.
Improved construction for inner product functional encryption. (2018). Security and Communication Networks. 2018, (1), 1-12.
Available at: https://ink.library.smu.edu.sg/sis_research/10108
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Additional URL
https://doi.org/10.1155/2018/6561418
