<s>
Type	O
1	O
certification	O
was	O
a	O
rigorous	O
process	O
that	O
included	O
testing	O
and	O
formal	O
analysis	O
of	O
(	O
among	O
other	O
things	O
)	O
cryptographic	O
security	O
,	O
functional	O
security	O
,	O
tamper	O
resistance	O
,	O
emissions	O
security	O
(	O
EMSEC/TEMPEST	O
)	O
,	O
and	O
security	O
of	O
the	O
product	O
manufacturing	O
and	O
distribution	O
process	O
.	O
</s>
<s>
Approved	O
encryption	O
algorithms	O
included	O
three-key	O
Triple	B-Algorithm
DES	I-Algorithm
,	O
and	O
AES	B-Algorithm
(	O
although	O
AES	B-Algorithm
can	O
also	O
be	O
used	O
in	O
NSA-certified	O
Type	O
1	O
products	O
)	O
.	O
</s>
<s>
Approvals	O
for	O
DES	B-Algorithm
,	O
two-key	O
Triple	B-Algorithm
DES	I-Algorithm
and	O
Skipjack	B-Algorithm
have	O
been	O
withdrawn	O
as	O
of	O
2015	O
.	O
</s>
