Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Trust and Reputation System for IoT Exploiting Distributed Ledger
  Technology   The advent of Bitcoin, and consequently Blockchain, has ushered in a new era
of decentralization. Blockchain enables mutually distrusting entities to work
collaboratively to attain a common objective. However, current Blockchain
technologies lack scalability, which limits their use in Internet of Things
(IoT) applications. Many devices on the Internet have the computational and
communication capabilities to facilitate decision-making. These devices will
soon be a 50 billion node network. Furthermore, new IoT business models such as
Sensor-as-a-Service (SaaS) require a robust Trust and Reputation System (TRS).
In this paper, we introduce an innovative distributed ledger combining Tangle
and Blockchain as a TRS framework for IoT. The combination of Tangle and
Blockchain provides maintainability of the former and scalability of the
latter. The proposed ledger can handle large numbers of IoT device transactions
and facilitates low power nodes joining and contributing. Employing a
distributed ledger mitigates many threats, such as whitewashing attacks. Along
with combining payments and rating protocols, the proposed approach provides
cleaner data to the upper layer reputation algorithm.

16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex