<s>
A	O
cloud	B-Application
access	I-Application
security	I-Application
broker	I-Application
(	O
CASB	O
)	O
(	O
sometimes	O
pronounced	O
cas-bee	O
)	O
is	O
on-premises	O
or	O
cloud	B-Architecture
based	O
software	O
that	O
sits	O
between	O
cloud	B-Architecture
service	I-Architecture
users	O
and	O
cloud	B-Architecture
applications	I-Architecture
,	O
and	O
monitors	O
all	O
activity	O
and	O
enforces	O
security	O
policies	O
.	O
</s>
<s>
First	O
defined	O
in	O
2012	O
by	O
Gartner	O
,	O
a	O
cloud	B-Application
access	I-Application
security	I-Application
broker	I-Application
(	O
CASB	O
)	O
is	O
defined	O
as	O
:	O
 [ An ] 	O
on-premises	O
,	O
or	O
cloud-based	B-Architecture
security	O
policy	O
enforcement	O
points	O
,	O
placed	O
between	O
cloud	B-Architecture
service	I-Architecture
consumers	O
and	O
cloud	B-Architecture
service	I-Architecture
providers	I-Architecture
to	O
combine	O
and	O
interject	O
enterprise	O
security	O
policies	O
as	O
the	O
cloud-based	B-Architecture
resources	O
are	O
accessed	O
.	O
</s>
<s>
CASBs	O
that	O
deliver	O
security	O
must	O
be	O
in	O
the	O
path	O
of	O
data	O
access	O
,	O
between	O
the	O
user	O
and	O
the	O
cloud	B-Architecture
provider	O
.	O
</s>
<s>
Architecturally	O
,	O
this	O
might	O
be	O
achieved	O
with	O
proxy	O
agents	O
on	O
each	O
end-point	O
device	O
,	O
or	O
in	O
agentless	B-General_Concept
fashion	O
without	O
configuration	O
on	O
each	O
device	O
.	O
</s>
<s>
Agentless	B-General_Concept
CASBs	O
allow	O
for	O
rapid	O
deployment	O
and	O
deliver	O
security	O
on	O
both	O
company-managed	O
and	O
unmanaged	O
BYOD	O
devices	O
.	O
</s>
<s>
Agentless	B-General_Concept
CASB	O
also	O
respect	O
user	O
privacy	O
,	O
inspecting	O
only	O
corporate	O
data	O
.	O
</s>
