<s>
Microsoft	B-Application
Private	I-Application
Folder	I-Application
was	O
a	O
product	O
(	O
withdrawn	O
and	O
discontinued	O
shortly	O
after	O
its	O
first	O
release	O
)	O
created	O
by	O
a	O
Microsoft	O
employee	O
and	O
available	O
as	O
part	O
of	O
their	O
"	O
Windows	O
Genuine	O
Advantage	O
"	O
program	O
.	O
</s>
<s>
It	O
allowed	O
users	O
to	O
protect	O
private	O
data	O
in	O
a	O
password	O
protected	O
folder	O
called	O
'	O
My	O
Private	B-Application
Folder	I-Application
 '	O
in	O
the	O
user	O
's	O
account	O
.	O
</s>
<s>
Microsoft	B-Application
Private	I-Application
Folder	I-Application
created	O
a	O
single	O
folder	O
on	O
the	O
user	O
's	O
desktop	O
which	O
,	O
when	O
opened	O
for	O
the	O
first	O
time	O
,	O
prompted	O
the	O
user	O
to	O
assign	O
it	O
a	O
password	O
.	O
</s>
<s>
While	O
the	O
core	O
implementation	O
details	O
of	O
this	O
service	O
are	O
not	O
public	O
,	O
it	O
is	O
assumed	O
that	O
Private	B-Application
Folder	I-Application
used	O
strong	O
encryption	O
with	O
a	O
key	O
based	O
solely	O
on	O
this	O
password	O
to	O
secure	O
the	O
data	O
contained	O
in	O
the	O
folder	O
.	O
</s>
<s>
Private	B-Application
Folder	I-Application
used	O
a	O
system	O
service	O
called	O
prfldrsvc	O
(	O
display	O
name	O
:	O
Private	B-Application
Folder	I-Application
Service	O
)	O
,	O
the	O
function	O
of	O
which	O
is	O
not	O
yet	O
publicly	O
known	O
.	O
</s>
