Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Comprehensive Study of the GeoPass User Authentication Scheme   Before deploying a new user authentication scheme, it is critical to subject
the scheme to comprehensive study. Few works, however, have undertaken such a
study. Recently, Thorpe et al. proposed GeoPass, the most promising of a class
of user authentication schemes based on geographic locations in online maps.
Their study showed very high memorability (97%) and satisfactory resilience
against online guessing, which means that GeoPass has compelling features for
real-world use. No comprehensive study, however, has been conducted for GeoPass
or any other location-based password scheme. In this paper, we present a
systematic approach for the detailed evaluation of a password system, which we
implement to study GeoPass. We conducted three separate studies to evaluate the
suitability of GeoPass for widespread use. First, we performed a field study
over two months, in which users in a real-world setting remembered their
location-passwords 96% of the time and showed improvement with more login
sessions. Second, we conducted a study to test how users would fare with
multiple location-passwords and found that users remembered their
location-passwords in less than 70% of login sessions, with 40% of login
failures due to interference effects. Third, we conducted a study to examine
the resilience of GeoPass against shoulder surfing. Our participants played the
role of attackers and had an overall success rate of 48%. Based on our results,
we suggest suitable applications of GeoPass in its current state and identify
aspects of GeoPass that must be improved before widespread deployment could be
considered.

17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
3
The categories of this paper are: physics