<s>
Autofill	B-Protocol
is	O
a	O
function	O
found	O
in	O
some	O
computer	O
applications	O
or	O
programs	O
,	O
typically	O
those	O
containing	O
forms	B-General_Concept
,	O
which	O
prefills	O
a	O
field	O
automatically	O
and	O
can	O
save	O
a	O
user	O
time	O
.	O
</s>
<s>
A	O
web	B-Application
browser	I-Application
's	O
autofill	B-Protocol
feature	O
is	O
used	O
to	O
fill	O
out	O
forms	B-General_Concept
with	O
previously	O
entered	O
values	O
,	O
or	O
a	O
predetermined	O
value	O
.	O
</s>
<s>
Autofill	B-Protocol
is	O
frequently	O
found	O
in	O
web	B-Application
browsers	I-Application
,	O
used	O
to	O
fill	O
in	O
web	B-General_Concept
forms	I-General_Concept
automatically	O
.	O
</s>
<s>
When	O
a	O
user	O
inputs	O
data	O
into	O
a	O
form	O
and	O
subsequently	O
submits	O
it	O
,	O
the	O
web	B-Application
browser	I-Application
will	O
often	O
save	O
the	O
form	O
's	O
contents	O
by	O
default	O
.	O
</s>
<s>
However	O
,	O
when	O
a	O
password	O
field	O
is	O
detected	O
,	O
the	O
web	B-Application
browser	I-Application
will	O
typically	O
ask	O
the	O
user	O
for	O
explicit	O
confirmation	O
before	O
saving	O
the	O
password	O
in	O
its	O
password	O
store	O
,	O
often	O
secured	O
with	O
a	O
built-in	O
password	O
manager	O
to	O
allow	O
the	O
use	O
of	O
a	O
"	O
master	O
password	O
"	O
before	O
credentials	O
can	O
be	O
autofilled	O
.	O
</s>
<s>
For	O
this	O
use	O
,	O
proposed	O
names	O
for	O
such	O
form	O
fields	O
,	O
in	O
earlier	O
HTML	B-Language
5	O
specifications	O
this	O
RFC	O
is	O
no	O
longer	O
referenced	O
,	O
thus	O
leaving	O
the	O
selection	O
of	O
names	O
up	O
to	O
each	O
browser	B-Application
's	O
implementation	O
.	O
</s>
<s>
Certain	O
web	B-Application
browsers	I-Application
such	O
as	O
Opera	B-Application
automatically	O
autofill	B-Protocol
credit	O
card	O
information	O
and	O
addresses	O
.	O
</s>
<s>
An	O
individual	O
webpage	O
may	O
enable	O
or	O
disable	O
browser	B-Application
autofill	B-Protocol
by	O
default	O
.	O
</s>
<s>
This	O
is	O
done	O
in	O
HTML	B-Language
with	O
the	O
autocomplete	O
attribute	O
in	O
a	O
<form>	O
element	O
or	O
its	O
corresponding	O
form	O
elements	O
.	O
</s>
<s>
It	O
has	O
been	O
shown	O
that	O
the	O
autofill	B-Protocol
feature	O
of	O
modern	O
browsers	B-Application
can	O
be	O
exploited	O
in	O
a	O
phishing	O
attack	O
with	O
the	O
use	O
of	O
hidden	O
form	O
fields	O
,	O
which	O
allows	O
personal	O
information	O
such	O
as	O
the	O
user	O
's	O
phone	O
number	O
to	O
be	O
collected	O
.	O
</s>
