<s>
Foremost	B-Application
is	O
a	O
forensic	O
data	B-Application
recovery	I-Application
program	O
for	O
Linux	B-Application
.	O
</s>
<s>
Foremost	B-Application
is	O
used	O
to	O
recover	O
files	O
using	O
their	O
headers	B-General_Concept
,	O
footers	B-Device
,	O
and	O
data	B-General_Concept
structures	I-General_Concept
through	O
a	O
process	O
known	O
as	O
file	O
carving	O
.	O
</s>
<s>
Although	O
written	O
for	O
law	O
enforcement	O
use	O
,	O
the	O
program	O
and	O
its	O
source	O
code	O
are	O
freely	O
available	O
and	O
can	O
be	O
used	O
as	O
a	O
general	O
data	B-Application
recovery	I-Application
tool	O
.	O
</s>
<s>
Foremost	B-Application
was	O
created	O
in	O
March	O
2001	O
to	O
duplicate	O
the	O
functionality	O
of	O
the	O
DOS	B-Device
program	O
CarvThis	O
for	O
use	O
on	O
the	O
Linux	B-Application
platform	O
.	O
</s>
<s>
Foremost	B-Application
was	O
originally	O
written	O
by	O
Special	O
Agents	O
Kris	O
Kendall	O
and	O
Jesse	O
Kornblum	O
of	O
the	O
U.S.	O
Air	O
Force	O
Office	O
of	O
Special	O
Investigations	O
.	O
</s>
<s>
These	O
modifications	O
included	O
improvements	O
to	O
Foremost	B-Application
's	O
accuracy	O
and	O
extraction	O
rates	O
.	O
</s>
<s>
Foremost	B-Application
is	O
designed	O
to	O
ignore	O
the	O
type	O
of	O
underlying	O
filesystem	B-Application
and	O
directly	O
read	O
and	O
copy	O
portions	O
of	O
the	O
drive	O
into	O
the	O
computer	O
's	O
memory	O
.	O
</s>
<s>
It	O
takes	O
these	O
portions	O
one	O
segment	O
at	O
a	O
time	O
,	O
and	O
using	O
a	O
process	O
known	O
as	O
file	O
carving	O
searches	O
this	O
memory	O
for	O
a	O
file	B-General_Concept
header	I-General_Concept
type	O
that	O
matches	O
the	O
ones	O
found	O
in	O
Foremost	B-Application
's	O
configuration	B-Protocol
file	I-Protocol
.	O
</s>
<s>
When	O
a	O
match	O
is	O
found	O
,	O
it	O
writes	O
that	O
header	B-General_Concept
and	O
the	O
data	O
following	O
it	O
into	O
a	O
file	O
,	O
stopping	O
when	O
either	O
a	O
footer	O
is	O
found	O
,	O
or	O
until	O
the	O
file	O
size	O
limit	O
is	O
reached	O
.	O
</s>
<s>
Foremost	B-Application
is	O
used	O
from	O
the	O
command-line	B-Application
interface	I-Application
,	O
with	O
no	O
graphical	B-Application
user	I-Application
interface	I-Application
option	O
available	O
.	O
</s>
<s>
There	O
is	O
a	O
configuration	B-Protocol
file	I-Protocol
(	O
usually	O
found	O
at	O
)	O
which	O
can	O
be	O
used	O
to	O
define	O
additional	O
file	O
types	O
.	O
</s>
<s>
Foremost	B-Application
can	O
be	O
used	O
to	O
recover	O
data	O
from	O
image	O
files	O
,	O
or	O
directly	O
from	O
hard	O
drives	O
that	O
use	O
the	O
ext3	B-Application
,	O
NTFS	B-Application
,	O
or	O
FAT	B-Application
filesystems	I-Application
.	O
</s>
<s>
Foremost	B-Application
can	O
also	O
be	O
used	O
via	O
a	O
computer	O
to	O
recover	O
data	O
from	O
iPhones	B-Device
.	O
</s>
