Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SEA-BREW: A Scalable Attribute-Based Encryption Scheme for Low-Bitrate
  IoT Wireless Networks   Attribute-Based Encryption (ABE) is an emerging cryptographic technique that
allows one to embed a fine-grained access control mechanism into encrypted
data. In this paper we propose a novel ABE scheme called SEA-BREW (Scalable and
Efficient Abe with Broadcast REvocation for Wireless networks), which is suited
for Internet of Things (IoT) and Industrial IoT (IIoT) applications. In
contrast to state-of-the-art ABE schemes, ours is capable of securely
performing key revocations with a single short broadcast message, instead of a
number of unicast messages that is linear with the number of nodes. This is
desirable for low-bitrate Wireless Sensor and Actuator Networks (WSANs) which
often are the heart of (I)IoT systems. In SEA-BREW, sensors, actuators, and
users can exchange encrypted data via a cloud server, or directly via wireless
if they belong to the same WSAN. We formally prove that our scheme is secure
also in case of an untrusted cloud server that colludes with a set of users,
under the generic bilinear group model. We show by simulations that our scheme
requires a constant computational overhead on the cloud server with respect to
the complexity of the access control policies. This is in contrast to
state-of-the-art solutions, which require instead a linear computational
overhead.

5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg