The distinction between a covert storage channel and a covert timing channel is not clearcut. Every timing channel can be transformed into an equivalent storage channel. Explain how this transformation could be done

Question

What will be an ideal response?

Answer 1

Covert
channels
typically
require
access
to
a
shared
clock
to
time
when
bits
become
available
in
the
covert
resource
and
when
bits
can
be
replaced.
Thus,
even
with
pure
storage
channels,
there
is
an
element
of
timing.
A
covert
timing
channel
works
by
modulating
the
time
at
which
something
occurs.
But
the
something
(which
might
be
an
interrupt
or
access
to
the
CPU
or
unlocking
a
semaphore,
for
example)
is
itself
a
resource
(the
interrupt,
the
processing,
or
the
semaphore),
represented
by
a
storage
table
entry.
Thus,
the
table
entry
or
the
something
itself
becomes
the
shared
resource
visible
to
the
two
cooperating
processes
from
which
the
covert
channel
is
built.