<s>
In	O
cryptography	O
,	O
CWC	B-Algorithm
Mode	I-Algorithm
(	O
Carter	O
–	O
Wegman	O
+	O
CTR	B-Algorithm
mode	O
)	O
is	O
an	O
AEAD	O
block	B-Algorithm
cipher	I-Algorithm
mode	I-Algorithm
of	I-Algorithm
operation	I-Algorithm
that	O
provides	O
both	O
encryption	O
and	O
built-in	O
message	O
integrity	O
,	O
similar	O
to	O
CCM	O
and	O
OCB	O
modes	O
.	O
</s>
<s>
It	O
combines	O
the	O
use	O
of	O
CTR	B-Algorithm
mode	O
for	O
encryption	O
with	O
an	O
efficient	O
polynomial	O
Carter	O
–	O
Wegman	O
MAC	O
and	O
is	O
designed	O
by	O
Tadayoshi	O
Kohno	O
,	O
John	O
Viega	O
and	O
Doug	O
Whiting	O
.	O
</s>
<s>
CWC	B-Algorithm
mode	I-Algorithm
was	O
submitted	O
to	O
NIST	O
for	O
standardization	O
,	O
but	O
NIST	O
opted	O
for	O
the	O
similar	O
GCM	B-Algorithm
mode	I-Algorithm
instead	O
.	O
</s>
