<s>
The	O
Cryptographic	B-Protocol
Message	I-Protocol
Syntax	I-Protocol
(	O
CMS	O
)	O
is	O
the	O
IETF	O
's	O
standard	O
for	O
cryptographically	O
protected	O
messages	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
by	O
cryptographic	O
schemes	O
and	O
protocols	O
to	O
digitally	O
sign	O
,	O
digest	B-Algorithm
,	O
authenticate	B-Algorithm
or	O
encrypt	O
any	O
form	O
of	O
digital	O
data	O
.	O
</s>
<s>
CMS	O
is	O
based	O
on	O
the	O
syntax	O
of	O
PKCS	O
#7	O
,	O
which	O
in	O
turn	O
is	O
based	O
on	O
the	O
Privacy-Enhanced	B-Protocol
Mail	I-Protocol
standard	O
.	O
</s>
<s>
CMS	O
is	O
used	O
as	O
the	O
key	O
cryptographic	O
component	O
of	O
many	O
other	O
cryptographic	O
standards	O
,	O
such	O
as	O
S/MIME	B-Protocol
,	O
PKCS	B-General_Concept
#12	I-General_Concept
and	O
the	O
digital	O
timestamping	O
protocol	O
.	O
</s>
<s>
OpenSSL	B-Language
is	O
open	B-Application
source	I-Application
software	I-Application
that	O
can	O
encrypt	O
,	O
decrypt	O
,	O
sign	O
and	O
verify	O
,	O
compress	O
and	O
uncompress	O
CMS	O
documents	O
.	O
</s>
