Paper Info
Title
Server-aided revocable attribute-based encryption for cloud computing services.
Abstract
Attribute-based encryption (ABE) has been regarded as a promising solution in cloud computing services to enable scalable access control without compromising the security. Despite of the advantages, efficient user revocation has been a challenge in ABE. One suggestion for user revocation is using the binary tree in the key generation phase of an ABE scheme, which enables a trusted key generation center to periodically distribute the key update information to all nonrevoked users over a public channel. This revocation approach reduces the size of key updates from linear to logarithmic in the number of users. But it requires each user to keep a private key of the logarithmic size, and asks each nonrevoked user to periodically update his/her decryption key for each new time period. To further optimize user revocation in ABE, a server-aided revocable ABE (SR-ABE) scheme has been proposed, in which almost all workloads of users incurred by the user revocation are outsourced to an untrusted server, and each user only needs to store a private key of the constant size. In addition, SR-ABE does not require any secure channel for the key transmission, and a user only needs to perform a small amount of calculations to decrypt a ciphertext. In this paper, we revisit the notion of SR-ABE, and present a generic construction of SR-ABE, which can transform a revocable ABE (RABE) scheme to an SR-ABE scheme. In addition, we give an instantiation of SR-ABE by applying the generic construction on a concrete RABE scheme, and implement an instantiation of SR-ABE and an RABE scheme to evaluate the performance of SR-ABE.
Year
DOI
Venue
2020
10.1002/cpe.5680
CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE
Keywords
DocType
Volume
access control,attribute-based encryption,cloud computing,outsourced computation,revocation
Journal
32.0
Issue
ISSN
Citations 
14.0
1532-0626
1
PageRank 
References 
Authors
0.35
0
4
Name
Order
Citations
PageRank
Hui Cui15410.32
Tsz Hon Yuen250733.86
R.H Deng34423362.82
Guilin Wang4271.04