____________________
are
____________________
that
define
how
____________________
and
____________________
can
interact
with
____________________
.
They
determine
who
is
allowed
to
access
what
resources
and
under
what
conditions
.
The
main
access
control
models
are
____________________
(
____________________
)
,
____________________
(
____________________
)
,
and
____________________
(
____________________
)
.
Each
model
has
its
own
set
of
____________________
and
____________________
for
____________________
or
____________________
access
to
resources
.
DAC
allows
users
to
control
access
to
their
own
resources
,
while
MAC
is
typically
used
in
____________________
where
access
is
based
on
____________________
.
RBAC
assigns
access
rights
based
on
the
____________________
that
users
have
within
an
____________________
.