<s>
LaserLock	B-General_Concept
is	O
a	O
copy	B-Application
restriction	I-Application
system	O
for	O
CD-ROMs	B-Device
with	O
32-bit	B-Application
Windows	I-Application
applications	O
introduced	O
by	O
MLS	O
LaserLock	B-General_Concept
International	O
Inc	O
.	O
in	O
1995	O
.	O
</s>
<s>
LaserLock	B-General_Concept
is	O
supposed	O
to	O
check	O
whether	O
the	O
original	O
storage	O
medium	O
of	O
a	O
program	O
is	O
inserted	O
.	O
</s>
<s>
The	O
protection	O
code	O
is	O
embedded	O
into	O
an	O
executable	B-Application
file	I-Application
on	O
the	O
disk	O
using	O
a	O
proprietary	O
tool	O
.	O
</s>
<s>
The	O
size	O
of	O
the	O
encrypted	O
file	O
varies	O
from	O
20MB	O
on	O
CD-ROMs	B-Device
to	O
40MB	O
on	O
DVD-ROMs	O
or	O
occasionally	O
only	O
5MB	O
.	O
</s>
<s>
LaserLock	B-General_Concept
includes	O
a	O
hidden	O
directory	O
on	O
the	O
disk	O
which	O
contains	O
corrupted	O
data	O
.	O
</s>
<s>
Copying	O
leads	O
to	O
unstable	O
behavior	O
of	O
the	O
copied	O
software	O
and	O
often	O
to	O
bad	B-Device
sectors	I-Device
that	O
make	O
it	O
impossible	O
to	O
use	O
without	O
the	O
original	O
disk	O
.	O
</s>
