<s>
installed	O
on	O
the	O
server	O
and	O
the	O
client	O
which	O
makes	O
untrusted	O
networks	O
safer	O
against	O
password-sniffing	O
packet-analysis	B-Protocol
software	O
like	O
dSniff	B-Protocol
and	O
safe	O
against	O
Shoulder	O
surfing	O
.	O
</s>
<s>
OPIE	O
uses	O
an	O
MD4	O
or	O
MD5	O
hash	B-Error_Name
function	I-Error_Name
to	O
generate	O
passwords	O
.	O
</s>
<s>
It	O
uses	O
its	O
own	O
passwd	B-Protocol
and	O
login	O
modules	O
.	O
</s>
<s>
If	O
the	O
Enter	B-Device
key	I-Device
is	O
pressed	O
at	O
the	O
password	O
prompt	O
,	O
it	O
will	O
turn	O
echo	O
on	O
,	O
so	O
what	O
is	O
being	O
typed	O
can	O
be	O
seen	O
when	O
entering	O
an	O
unfamiliar	O
password	O
from	O
a	O
printout	O
.	O
</s>
<s>
OPIE	O
shipped	O
with	O
DragonFly	B-Application
BSD	I-Application
,	O
FreeBSD	B-Operating_System
and	O
OpenSUSE	B-Operating_System
.	O
</s>
<s>
It	O
can	O
be	O
installed	O
on	O
a	O
Unix-like	B-Operating_System
server	O
and	O
clients	O
for	O
improved	O
security	O
.	O
</s>
