Privacy and security are the most important issues to the popularity of cloud computing
service. In recent years, there are many research schemes of cloud computing privacy …

With the thriving growth of the cloud computing, the security and privacy concerns of
outsourcing data have been increasing dramatically. However, because of delegating the …

We investigate the best-possible (asymptotic) efficiency of functional encryption (FE) and
attribute-based encryption (ABE) by proving inherent space-time trade-offs and constructing …

Pair encodings and predicate encodings, recently introduced by Attrapadung [2] and Wee
[36] respectively, greatly simplify the process of designing and analyzing predicate and …

We address the problem of ciphertext-policy attribute-based encryption with fine access
control, a cryptographic primitive which has many concrete application scenarios such as …

Attribute-based encryption (ABE) is an advanced cryptographic tool and useful to build
various types of access control systems. Toward the goal of making ABE more practical, we …

We present several transformations that combine a set of attribute-based encryption (ABE)
schemes for simpler predicates into a new ABE scheme for more expressive composed …

Abstract Wee (TCC'14) and Attrapadung (Eurocrypt'14) introduced predicate and pair
encodings, respectively, as a simple way to construct and analyze attribute-based …

With the rapid development of cloud computing and the Internet of Things, many companies
or individuals store their data in the cloud server, which brings new challenges to the …

We revisit the method of designing public-key puncturable encryption schemes and present
a generic conversion by leveraging the techniques of distributed key-distribution and …