Publication Type
Journal Article
Version
acceptedVersion
Publication Date
8-2016
Abstract
In this paper, we propose a revocable and decentralized attribute-based encryption (ABE) system that splits the task of decryption key generation across multiple attribute authorities (AAs) without requiring any central party such that it achieves attribute revocation by simply stopping updating of the corresponding private key. In our system, a party can easily behave as an AA by creating a public and private key pair without any global communication except the creation for the common system parameters, under which it can periodically issue/update private key components for users that reflect their attributes, and an AA can freely leave the system once its corresponding attribute is revoked without communication with other AAs. In addition, to revoke a user, those AAs that have issued private keys to this user easily cease the key updating process for the user without affecting other AAs' execution. For the construction of our system, the technical barrier is to make private keys collusion resistant. Since in our system each component of a user's private key at a time period may come from different AAs and there is no coordination between these AAs, traditional technique of binding together different components (issued by different AAs) of a private key by randomization cannot be employed. To overcome this, we tie the key components together and prevent collusion attacks between different users by embedding distinct identifiers and a commonly shared time attribute in these components.
Keywords
revocation, decentralization, ABE
Discipline
Information Security
Research Areas
Cybersecurity
Publication
Computer Journal
Volume
59
Issue
8
First Page
1220
Last Page
1235
ISSN
0010-4620
Identifier
10.1093/comjnl/bxw007
Publisher
Oxford University Press (OUP): Policy A - Oxford Open Option A
Citation
CUI, Hui and DENG, Robert H..
Revocable and decentralized attribute-based encryption. (2016). Computer Journal. 59, (8), 1220-1235.
Available at: https://ink.library.smu.edu.sg/sis_research/3344
Copyright Owner and License
Authors
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/10.1093/comjnl/bxw007