Paper Info
Title
Generic Approach to Outsource the Decryption of Attribute-Based Encryption in Cloud Computing.
Abstract
The notion of attribute-based encryption with outsourced decryption (OD-ABE) was proposed by Green, Hohenberger, and Waters. In OD-ABE, the ABE ciphertext is converted to a partially-decrypted ciphertext that has a shorter bit length and a faster decryption time than that of the ABE ciphertext. In particular, the transformation can be performed by a powerful third party with a public transformation key. In this paper, we propose a generic approach for constructing ABE with outsourced decryption from standard ABE, as long as the later satisfies some additional properties. Its security can be reduced to the underlying standard ABE in the selective security model by a black-box way. To avoid the drawback of selective security in practice, we further propose a modified decryption outsourcing mode so that our generic construction can be adapted to satisfying adaptive security. This partially solves the open problem of constructing an OD-ABE scheme, and its adaptive security can be reduced to the underlying ABE scheme in a black-box way. Then, we present some concrete constructions that not only encompass existing ABE outsourcing schemes of Green et al., but also result in new selectively/adaptively-secure OD-ABE schemes with more efficient transformation key generation algorithm. Finally, we use the PBC library to test the efficiency of our schemes and compare the results with some previous ones, which shows that our schemes are more efficient in terms of decryption outsourcing and transformation key generation.
Year
DOI
Venue
2019
10.1109/ACCESS.2019.2907364
IEEE ACCESS
Keywords
Field
DocType
Attribute-based encryption,cloud computing,outsourcing,security model
Key generation,Open problem,Computer science,Attribute-based encryption,Outsourcing,Encryption,Ciphertext,Computer security model,Distributed computing,Cloud computing
Journal
Volume
ISSN
Citations 
7
2169-3536
1
PageRank 
References 
Authors
0.35
0
2
Name
Order
Citations
PageRank
Baodong Qin119019.40
Dong Zheng233543.37