Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: MessageGuard: A Browser-based Platform for Usable, Content-Based
  Encryption Research   This paper describes MessageGuard, a browser-based platform for research into
usable content-based encryption. MessageGuard is designed to enable
collaboration between security and usability researchers on long-standing
research questions in this area. It significantly simplifies the effort
required to work in this space and provides a place for research results to be
shared, replicated, and compared with minimal confounding factors. MessageGuard
provides ubiquitous encryption and secure cryptographic operations, enabling
research on any existing web application, with realistic usability studies on a
secure platform. We validate MessageGuard's compatibility and performance, and
we illustrate its utility with case studies for Gmail and Facebook Chat.

21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga