<s>
This	O
article	O
details	O
the	O
various	O
tables	B-Data_Structure
referenced	O
in	O
the	O
Data	B-Algorithm
Encryption	I-Algorithm
Standard	I-Algorithm
(	O
DES	B-Algorithm
)	O
block	O
cipher	O
.	O
</s>
<s>
Note	O
that	O
only	O
56	O
bits	O
of	O
the	O
64	O
bits	O
of	O
the	O
input	O
are	O
selected	O
;	O
the	O
remaining	O
eight	O
(	O
8	O
,	O
16	O
,	O
24	O
,	O
32	O
,	O
40	O
,	O
48	O
,	O
56	O
,	O
64	O
)	O
were	O
specified	O
for	O
use	O
as	O
parity	B-Error_Name
bits	I-Error_Name
.	O
</s>
<s>
This	O
table	O
lists	O
the	O
eight	O
S-boxes	B-Algorithm
used	O
in	O
DES	B-Algorithm
.	O
</s>
<s>
Each	O
S-box	B-Algorithm
replaces	O
a	O
6-bit	O
input	O
with	O
a	O
4-bit	O
output	O
.	O
</s>
<s>
For	O
example	O
,	O
an	O
input	O
"	O
011011	O
"	O
has	O
outer	O
bits	O
"	O
01	O
"	O
and	O
inner	O
bits	O
"	O
1101	O
"	O
;	O
noting	O
that	O
the	O
first	O
row	O
is	O
"	O
00	O
"	O
and	O
the	O
first	O
column	O
is	O
"	O
0000	O
"	O
,	O
the	O
corresponding	O
output	O
for	O
S-box	B-Algorithm
S5	O
would	O
be	O
"	O
1001	O
"	O
(=	O
9	O
)	O
,	O
the	O
value	O
in	O
the	O
second	O
row	O
,	O
14th	O
column	O
.	O
</s>
<s>
(	O
See	O
S-box	B-Algorithm
)	O
.	O
</s>
