Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Security of Alerting Authorities in the WWW: Measuring Namespaces,
  DNSSEC, and Web PKI   During disasters, crisis, and emergencies the public relies on online
services provided by official authorities to receive timely alerts, trustworthy
information, and access to relief programs. It is therefore crucial for the
authorities to reduce risks when accessing their online services. This includes
catering to secure identification of service, secure resolution of name to
network service, and content security and privacy as a minimum base for
trustworthy communication.
  In this paper, we take a first look at Alerting Authorities (AA) in the US
and investigate security measures related to trustworthy and secure
communication. We study the domain namespace structure, DNSSEC penetration, and
web certificates. We introduce an integrative threat model to better understand
whether and how the online presence and services of AAs are harmed. As an
illustrative example, we investigate 1,388 Alerting Authorities. We observe
partial heightened security relative to the global Internet trends, yet find
cause for concern as about 78% of service providers fail to deploy measures of
trustworthy service provision. Our analysis shows two major shortcomings.
First, how the DNS ecosystem is leveraged: about 50% of organizations do not
own their dedicated domain names and are dependent on others, 55% opt for
unrestricted-use namespaces, which simplifies phishing, and less than 4% of
unique AA domain names are secured by DNSSEC, which can lead to DNS poisoning
and possibly to certificate misissuance. Second, how Web PKI certificates are
utilized: 15% of all hosts provide none or invalid certificates, thus cannot
cater to confidentiality and data integrity, 64% of the hosts provide domain
validation certification that lack any identity information, and shared
certificates have gained on popularity, which leads to fate-sharing and can be
a cause for instability.

17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat