<s>
A	O
sealed	B-Application
server	I-Application
is	O
a	O
type	O
of	O
server	B-Application
which	O
is	O
designed	O
to	O
run	O
without	O
users	O
logging	O
in	O
.	O
</s>
<s>
This	O
setup	O
has	O
several	O
potential	O
benefits	O
over	O
a	O
traditional	O
server	B-Application
:	O
</s>
<s>
Since	O
users	O
do	O
not	O
log	O
in	O
,	O
it	O
is	O
possible	O
for	O
a	O
sealed	B-Application
server	I-Application
to	O
use	O
stronger	O
authentication	O
than	O
a	O
password	O
mechanism	O
.	O
</s>
<s>
Since	O
files	O
are	O
not	O
accessed	O
directly	O
,	O
a	O
sealed	B-Application
server	I-Application
can	O
store	O
its	O
payload	O
in	O
any	O
format	O
,	O
without	O
the	O
clients	O
needing	O
any	O
information	O
about	O
this	O
.	O
</s>
<s>
Since	O
a	O
user	O
does	O
not	O
have	O
full	O
control	O
over	O
the	O
files	O
on	O
the	O
server	B-Application
,	O
there	O
is	O
less	O
opportunity	O
for	O
them	O
to	O
,	O
for	O
example	O
,	O
change	O
the	O
mode	B-Language
of	O
a	O
private	O
file	O
to	O
be	O
world-readable	O
.	O
</s>
<s>
A	O
sealed	B-Application
server	I-Application
is	O
primarily	O
useful	O
for	O
data-centric	O
mechanisms	O
such	O
as	O
email	O
,	O
and	O
is	O
unsuited	O
to	O
file-centric	O
protocols	O
such	O
as	O
FTP	B-Protocol
.	O
</s>
