<s>
Wuala	B-Application
was	O
a	O
secure	O
online	B-Application
file	I-Application
storage	I-Application
,	O
file	B-Application
synchronization	I-Application
,	O
versioning	O
and	O
backup	B-Protocol
service	O
originally	O
developed	O
and	O
run	O
by	O
Caleido	O
Inc	O
.	O
</s>
<s>
The	O
service	O
stores	O
files	O
in	O
data	O
centres	O
that	O
are	O
provided	O
by	O
Wuala	B-Application
in	O
multiple	O
European	O
countries	O
(	O
France	O
,	O
Germany	O
,	O
Switzerland	O
)	O
.	O
</s>
<s>
On	O
17	O
August	O
2015	O
Wuala	B-Application
announced	O
that	O
it	O
was	O
discontinuing	O
its	O
service	O
and	O
that	O
all	O
stored	O
data	O
would	O
be	O
deleted	O
on	O
15	O
November	O
2015	O
.	O
</s>
<s>
Wuala	B-Application
recommended	O
a	O
rival	O
cloud	O
storage	O
startup	O
,	O
Tresorit	B-Protocol
,	O
as	O
an	O
alternative	O
to	O
its	O
remaining	O
customers	O
.	O
</s>
<s>
An	O
"	O
open	O
beta	O
"	O
-java-applet	O
,	O
available	O
from	O
the	O
website	O
,	O
could	O
be	O
run	O
from	O
a	O
web	B-Application
browser	I-Application
.	O
</s>
<s>
The	O
Wuala	B-Application
Webstart	O
project	O
was	O
registered	O
on	O
SourceForge.net	O
.	O
</s>
<s>
An	O
Alpha	O
release	O
REST	B-Protocol
API	I-Protocol
,	O
at	O
a	O
very	O
early	O
stage	O
of	O
development	O
,	O
supported	O
HTTP	O
GET	O
requests	O
for	O
content	O
that	O
was	O
either	O
public	O
,	O
or	O
shared	O
through	O
a	O
keyed	O
hyperlink	O
.	O
</s>
<s>
The	O
Uniform	O
Resource	O
Locator	O
changed	O
from	O
to	O
and	O
files	O
that	O
were	O
public	O
,	O
or	O
shared	O
through	O
a	O
keyed	O
hyperlink	O
,	O
were	O
made	O
accessible	O
through	O
web	B-Application
browsers	I-Application
.	O
</s>
<s>
Wuala	B-Application
described	O
the	O
merger	O
as	O
being	O
between	O
Wuala	B-Application
and	O
LaCie	O
(	O
not	O
Caleido	O
AG	O
and	O
LaCie	O
)	O
.	O
</s>
<s>
Wuala	B-Application
announced	O
that	O
it	O
would	O
allow	O
no	O
further	O
renewals	O
or	O
purchase	O
of	O
storage	O
.	O
</s>
<s>
When	O
a	O
user	O
adds	O
a	O
file	O
to	O
Wuala	B-Application
,	O
or	O
saves	O
changes	O
to	O
a	O
file	O
that	O
is	O
served	O
by	O
Wuala	B-Application
,	O
the	O
user	O
's	O
local	O
copy	O
of	O
file	O
is	O
:	O
first	O
encrypted	O
,	O
then	O
chunked	O
into	O
redundant	O
fragments	O
using	O
Reed-Solomon	B-Error_Name
error	I-Error_Name
correction	I-Error_Name
codes	O
.	O
</s>
<s>
Wuala	B-Application
offered	O
free	O
accounts	O
that	O
had	O
5	O
GB	O
of	O
storage	O
for	O
no	O
charge	O
.	O
</s>
<s>
One	O
of	O
the	O
distinguishing	O
features	O
of	O
Wuala	B-Application
,	O
the	O
ability	O
to	O
trade	O
local	O
disk	O
storage	O
space	O
against	O
cloud	O
storage	O
,	O
is	O
no	O
longer	O
available	O
.	O
</s>
<s>
The	O
user	O
interface	O
offers	O
most	O
of	O
the	O
features	O
that	O
are	O
normally	O
associated	O
with	O
a	O
file	B-Application
manager	I-Application
.	O
</s>
<s>
A	O
registered	O
user	O
can	O
install	O
the	O
Java-based	O
client	O
application	O
(	O
SWT-GUI	O
)	O
:	O
</s>
<s>
with	O
FUSE	B-Application
,	O
MacFUSE	B-Application
and	O
Dokan	O
respectively	O
for	O
file	O
system	O
integration	O
.	O
</s>
<s>
Through	O
a	O
web	B-Application
browser	I-Application
,	O
on	O
a	O
computer	O
that	O
has	O
Java	B-Device
installed	O
:	O
</s>
<s>
the	O
user	O
can	O
start/trust	O
a	O
Java	B-Application
applet	I-Application
,	O
which	O
downloads	O
and	O
runs	O
a	O
class	B-Language
loader	I-Language
allowing	O
fast	O
start	O
of	O
the	O
latest	O
version	O
of	O
the	O
Wuala	B-Application
application	O
.	O
</s>
<s>
If	O
the	O
computer	O
is	O
without	O
Java	B-Device
,	O
or	O
if	O
running	O
of	O
the	O
class	B-Language
loader	I-Language
is	O
prevented	O
:	O
</s>
<s>
According	O
to	O
Wuala	B-Application
's	O
FAQ	O
,	O
the	O
software	O
uses	O
AES-256	B-Algorithm
for	O
encryption	O
and	O
RSA-2048	O
for	O
key	O
exchange	O
and	O
signatures	O
.	O
</s>
<s>
According	O
to	O
the	O
FAQ	O
,	O
Wuala	B-Application
employs	O
full	O
client-side	B-Protocol
encryption	I-Protocol
.	O
</s>
<s>
All	O
files	O
and	O
their	O
metadata	O
–	O
most	O
OS	B-Operating_System
X	I-Operating_System
metadata	O
is	O
not	O
supported	O
–	O
get	O
encrypted	O
before	O
they	O
are	O
uploaded	O
.	O
</s>
<s>
The	O
disadvantage	O
of	O
this	O
is	O
that	O
Wuala	B-Application
has	O
no	O
password	O
recovery	O
and	O
all	O
data	O
processing	O
needs	O
to	O
be	O
done	O
in	O
the	O
client	O
(	O
for	O
example	O
creating	O
a	O
search	O
index	O
)	O
.	O
</s>
<s>
Since	O
the	O
source	O
code	B-Application
to	O
Wuala	B-Application
has	O
not	O
been	O
released	O
,	O
it	O
is	O
difficult	O
to	O
ensure	O
that	O
the	O
software	O
does	O
what	O
it	O
states	O
it	O
does	O
(	O
including	O
proper	O
client-side	B-Protocol
encryption	I-Protocol
)	O
.	O
</s>
<s>
These	O
facts	O
mean	O
that	O
users	O
of	O
Wuala	B-Application
are	O
not	O
safe	O
from	O
possible	O
backdoors	O
in	O
code	B-Application
.	O
</s>
