<s>
The	O
Certificate	B-Protocol
Management	I-Protocol
over	I-Protocol
CMS	I-Protocol
(	O
CMC	O
)	O
is	O
an	O
Internet	O
Standard	O
published	O
by	O
the	O
IETF	O
,	O
defining	O
transport	O
mechanisms	O
for	O
the	O
Cryptographic	B-Protocol
Message	I-Protocol
Syntax	I-Protocol
(	O
CMS	O
)	O
.	O
</s>
<s>
Similarly	O
to	O
the	O
Certificate	B-Protocol
Management	I-Protocol
Protocol	I-Protocol
(	O
CMP	O
)	O
,	O
it	O
can	O
be	O
used	O
for	O
obtaining	O
X.509	O
digital	O
certificates	O
in	O
a	O
public	B-Architecture
key	I-Architecture
infrastructure	I-Architecture
(	O
PKI	O
)	O
.	O
</s>
<s>
The	O
Enrollment	B-Protocol
over	I-Protocol
Secure	I-Protocol
Transport	I-Protocol
(	O
EST	O
)	O
protocol	O
,	O
described	O
in	O
,	O
can	O
be	O
seen	O
as	O
a	O
profile	O
of	O
CMC	O
for	O
use	O
in	O
provisioning	O
certificates	O
to	O
end	O
entities	O
.	O
</s>
<s>
As	O
such	O
,	O
EST	O
can	O
play	O
a	O
similar	O
role	O
to	O
SCEP	B-Protocol
.	O
</s>
