Cryptography Reference
In-Depth Information
Students
Non- students
All users
Students
Non- students
All users
4.5
3.6
4
3.5
3.5
3.4
3
3.3
2.5
2
3.2
All users
1.5
3.1
All users
1
Non- students
3
Non- students
0.5
2.9
0
Students
2.8
USB
Students
Phone
USB
Online
Phone
Online
(a) Giving Control
(b) Perceived Ease of Use
Students
Non- students
All users
Students
Non- students
All users
3.5
3.5
3.4
3
3.3
2.5
3.2
2
3.1
1.5
All users
3
All users
1
2.9
Non- students
Non- students
0.5
2.8
0
Students
2.7
Students
USB
USB
Phone
Phone
Online
Online
(c) Perceived Necessity
(d) Perceived Security
Fig. 5.
Post Test - Students vs. Non-Students
Students and Non-Students: the former still preferred Online or Phone, whereas the lat-
ter found the Phone as the easiest. Paired t-tests, however, did not lead to any significant
statistical differences with respect to Perceive Ease.
•
Perceived Necessity:
Looking at the Perceived Necessity (Figure 5(c)), we find that
Students order of preference is USB, followed by Online and then Phone. Non-Students,
on the other hand, like the Phone the best, followed by USB and then Online. Collec-
tively looking at All Users, USB is an overall winner, which is somewhat better than
Phone, which in turn is quite better than Online. These findings are somewhat similar
to those in case of Perceived Ease, which means that necessity of a PM was based on its
ease. Based on paired t-tests, Non-Students found USB better than Online (
p
=0
.
0448
).
No other significant statistical differences were found.
•
Perceived Security:
From the average ratings corresponding to Perceived Security
(Figure 5(d)), we can see that USB is generally preferred by all users, and there is not
much to choose between Phone and Online (although Students prefer Online slightly
more so than Non-Students, who slightly prefer Phone).
According to paired t-tests, Students found USB better than Phone (
p
=0
.
0132
),
and USB better than Online (
p
=0
.
03
). All Users found USB more secure than Phone
(
p
=0
.
0089
) and USB more secure than Online (
p
=0
.
012
). No other significant
statistical differences were found.
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