<s>
Fusker	B-Application
is	O
a	O
type	O
of	O
website	O
or	O
utility	B-Application
that	O
extracts	O
images	O
in	O
bulk	O
from	O
a	O
website	O
(	O
typically	O
from	O
free	O
hosted	O
galleries	O
)	O
by	O
systematically	O
loading	O
and	O
downloading	O
images	O
following	O
a	O
pattern	O
in	O
the	O
website	O
's	O
URL	O
scheme	O
.	O
</s>
<s>
Fusker	B-Application
software	O
allows	O
users	O
to	O
identify	O
a	O
sequence	O
of	O
images	O
with	O
a	O
single	O
pattern	O
,	O
for	O
example	O
:	O
http://www.example.com/images/pic[1-16].jpg	O
.	O
</s>
<s>
When	O
this	O
pattern	O
is	O
given	O
to	O
a	O
fusker	B-Application
website	O
,	O
the	O
website	O
would	O
produce	O
a	O
page	O
that	O
displays	O
all	O
sixteen	O
images	O
in	O
that	O
range	O
.	O
</s>
<s>
The	O
web	O
page	O
is	O
then	O
presented	O
to	O
the	O
person	O
who	O
entered	O
the	O
fusker	B-Application
,	O
and	O
can	O
also	O
be	O
saved	O
on	O
the	O
fusker	B-Application
web	O
server	B-Application
so	O
that	O
other	O
people	O
may	O
view	O
it	O
.	O
</s>
<s>
Server-side	B-Application
fusker	B-Application
software	O
extracts	O
content	O
(	O
e.g.	O
</s>
<s>
image	O
or	O
video	O
)	O
from	O
its	O
original	O
location	O
and	O
displays	O
it	O
in	O
a	O
new	O
page	O
on	O
the	O
client-side	O
(	O
user	O
's	O
web	B-Application
browser	I-Application
)	O
.	O
</s>
<s>
However	O
,	O
the	O
content	O
is	O
not	O
downloaded	O
locally	O
to	O
the	O
client	O
by	O
the	O
fusker	B-Application
server	B-Application
;	O
the	O
new	O
page	O
that	O
the	O
fusker	B-Application
server	B-Application
produces	O
instructs	O
the	O
client	O
web	B-Application
browser	I-Application
to	O
retrieve	O
each	O
piece	O
of	O
content	O
from	O
the	O
content	O
host	O
web	O
server	B-Application
and	O
display	O
it	O
in	O
the	O
new	O
page	O
.	O
</s>
<s>
Many	O
server-side	B-Application
implementations	O
of	O
the	O
Fusker	B-Application
technology	O
are	O
available	O
on	O
the	O
web	O
.	O
</s>
<s>
In	O
addition	O
,	O
a	O
fusker	B-Application
can	O
also	O
be	O
implemented	O
as	O
client	B-Protocol
software	I-Protocol
that	O
completely	O
bypasses	O
the	O
need	O
for	O
a	O
third-party	O
fusker	B-Application
web	O
site	O
.	O
</s>
<s>
By	O
eliminating	O
the	O
need	O
to	O
fusker	B-Application
via	O
a	O
web	O
site	O
,	O
the	O
need	O
to	O
use	O
a	O
web	B-Application
browser	I-Application
is	O
also	O
eliminated	O
.	O
</s>
<s>
Due	O
to	O
not	O
using	O
a	O
web	B-Application
browser	I-Application
,	O
fusker	B-Application
client	B-Protocol
software	I-Protocol
will	O
often	O
store	O
downloaded	O
content	O
locally	O
on	O
the	O
client	B-Protocol
machine	I-Protocol
.	O
</s>
<s>
This	O
reduces	O
Internet	O
bandwidth	O
usage	O
since	O
fusker	B-Application
client	B-Protocol
software	I-Protocol
,	O
unlike	O
a	O
web	B-Application
browser	I-Application
,	O
only	O
retrieves	O
content	O
once	O
(	O
no	O
repeat	O
visits	O
to	O
web	O
pages	O
)	O
.	O
</s>
<s>
Fusker	B-Application
client	B-Protocol
software	I-Protocol
is	O
able	O
to	O
do	O
this	O
because	O
it	O
can	O
effectively	O
emulate	B-Application
a	O
web	B-Application
browser	I-Application
;	O
referrer	B-Protocol
and	O
user	B-Protocol
agent	I-Protocol
headers	O
are	O
rewritten	O
to	O
an	O
acceptable	O
value	O
,	O
and	O
more	O
complex	O
implementations	O
can	O
also	O
emulate	B-Application
a	O
web	B-Application
browser	I-Application
to	O
the	O
point	O
of	O
being	O
able	O
to	O
click	O
links	O
and	O
log	B-General_Concept
in	I-General_Concept
to	O
accounts	O
.	O
</s>
<s>
However	O
,	O
just	O
like	O
server-based	O
fuskers	B-Application
,	O
client	B-Protocol
software	I-Protocol
fuskers	B-Application
also	O
separate	O
content	O
from	O
its	O
original	O
surroundings	O
,	O
which	O
may	O
have	O
included	O
advertisements	O
on	O
the	O
content	O
host	O
's	O
web	O
site	O
.	O
</s>
<s>
With	O
the	O
sophistication	O
of	O
the	O
modern	O
web	B-Application
browser	I-Application
it	O
is	O
now	O
possible	O
to	O
run	O
a	O
client-side	O
fusker	B-Application
software	B-Application
application	I-Application
fully	O
within	O
a	O
web	B-Application
browser	I-Application
such	O
as	O
Internet	B-Application
Explorer	I-Application
.	O
</s>
<s>
These	O
web	B-Application
browser	I-Application
implementations	O
are	O
capable	O
of	O
reading	O
and	O
extracting	O
the	O
image	O
information	O
in	O
the	O
web	O
pages	O
you	O
browse	O
.	O
</s>
<s>
They	O
no	O
longer	O
rely	O
on	O
searches	O
of	O
domains	O
with	O
random	O
search	O
strings	O
nor	O
IP	O
address	O
spoofing	O
by	O
impersonating	O
a	O
referrer	B-Protocol
or	O
user	B-Protocol
agent	I-Protocol
.	O
</s>
<s>
Web	B-Application
browser	I-Application
fusker	B-Application
applications	O
essentially	O
provide	O
a	O
scrapbooking	O
interface	O
within	O
the	O
web	B-Application
browser	I-Application
which	O
allows	O
direct	O
and	O
customized	O
access	O
to	O
the	O
web	O
image	O
content	O
.	O
</s>
<s>
Some	O
implementations	O
allow	O
you	O
to	O
save	O
sets	O
of	O
fusker	B-Application
information	O
as	O
a	O
collection	O
file	O
which	O
can	O
be	O
electronically	O
shared	O
with	O
other	O
users	O
of	O
the	O
fusker	B-Application
application	O
without	O
the	O
need	O
to	O
store	O
or	O
transmit	O
gigabytes	O
of	O
image	O
data	O
.	O
</s>
<s>
Visitors	O
to	O
a	O
fusker	B-Application
website	O
frequently	O
see	O
copyrighted	O
pornographic	O
images	O
that	O
have	O
been	O
separated	O
from	O
their	O
intended	O
context	O
,	O
known	O
as	O
hot-linking	O
.	O
</s>
<s>
Fuskers	B-Application
have	O
been	O
used	O
to	O
obtain	O
media	O
from	O
nude	O
photos	O
hosted	O
on	O
private	O
or	O
password-protected	O
album	O
in	O
Photobucket	B-Algorithm
without	O
the	O
consent	O
of	O
the	O
media	O
owners	O
.	O
</s>
<s>
Some	O
of	O
these	O
images	O
were	O
then	O
uploaded	O
to	O
the	O
r/photobucketplunder	O
Reddit	B-Application
community	O
,	O
which	O
had	O
8000	O
subscribers	O
before	O
it	O
was	O
shutdown	O
when	O
Photobucket	B-Algorithm
sent	O
a	O
DMCA	O
request	O
to	O
the	O
community	O
's	O
moderators	O
.	O
</s>
<s>
Companies	O
that	O
provide	O
free	O
hosted	O
galleries	O
strongly	O
dislike	O
fuskers	B-Application
because	O
they	O
have	O
the	O
potential	O
to	O
cost	O
them	O
a	O
lot	O
of	O
money	O
in	O
bandwidth	O
bills	O
,	O
and	O
because	O
the	O
only	O
reason	O
the	O
free	O
galleries	O
are	O
provided	O
is	O
to	O
entice	O
the	O
user	O
into	O
clicking	O
on	O
a	O
more	O
profitable	O
link	O
,	O
and	O
those	O
links	O
are	O
no	O
longer	O
displayed	O
when	O
a	O
fusker	B-Application
is	O
used	O
.	O
</s>
<s>
Some	O
client-side	O
fusker	B-Application
implementations	O
blindly	O
search	O
domains	O
for	O
images	O
based	O
on	O
common	O
file	O
names	O
and	O
directory	O
structures	O
.	O
</s>
<s>
Some	O
argue	O
the	O
numerous	O
HTTP	B-Protocol
404	I-Protocol
file	O
not	B-Protocol
found	I-Protocol
and	O
HTTP	B-Protocol
403	I-Protocol
forbidden	O
server	B-Application
errors	O
generated	O
constitute	O
a	O
denial	O
of	O
service	O
attack	O
.	O
</s>
<s>
In	O
response	O
,	O
most	O
web	O
site	O
administrators	O
check	O
the	O
referrer	B-Protocol
and	O
user	B-Protocol
agent	I-Protocol
headers	O
sent	O
by	O
the	O
requesting	O
client	B-Protocol
software	I-Protocol
to	O
prevent	O
their	O
images	O
from	O
being	O
"	O
fuskered	O
"	O
,	O
or	O
require	O
users	O
to	O
log	B-General_Concept
in	I-General_Concept
.	O
</s>
<s>
However	O
,	O
some	O
fusker	B-Application
software	O
has	O
the	O
ability	O
to	O
emulate	B-Application
a	O
legitimate	O
web	B-Application
browser	I-Application
.	O
</s>
<s>
referrer	B-Protocol
and	O
user	B-Protocol
agent	I-Protocol
headers	O
are	O
rewritten	O
to	O
an	O
acceptable	O
value	O
,	O
and	O
more	O
complex	O
implementations	O
can	O
also	O
emulate	B-Application
a	O
web	B-Application
browser	I-Application
to	O
the	O
point	O
of	O
being	O
able	O
to	O
click	O
links	O
and	O
log	O
into	O
accounts	O
.	O
</s>
<s>
Web	B-Application
browser	I-Application
implementations	O
running	O
within	O
a	O
legitimate	O
browser	B-Application
offer	O
a	O
more	O
legitimate	O
access	O
to	O
the	O
web	O
content	O
.	O
</s>
<s>
"	O
Fusker	B-Application
"	O
is	O
a	O
Danish	O
term	O
which	O
originally	O
meant	O
a	O
person	O
covertly	O
doing	O
work	O
outside	O
the	O
official	O
guilds	O
.	O
</s>
<s>
The	O
original	O
fusker	B-Application
technology	O
was	O
created	O
by	O
Carthag	O
Tuek	O
,	O
who	O
made	O
the	O
Perl	B-Language
CGI	B-Language
script	I-Language
as	O
a	O
work-alike	O
of	O
the	O
UNIX/Linux	O
cURL	B-Language
tool	O
,	O
specifically	O
its	O
URL-globbing	O
functionality	O
.	O
</s>
