<s>
UltraISO	B-Application
is	O
a	O
crippleware	O
application	O
for	O
Microsoft	B-Application
Windows	I-Application
for	O
creating	O
,	O
modifying	O
and	O
converting	O
ISO	B-General_Concept
image	I-General_Concept
files	O
used	O
for	O
optical	B-Application
disc	I-Application
authoring	I-Application
,	O
currently	O
being	O
produced	O
by	O
EZB	O
Systems	O
.	O
</s>
<s>
Initially	O
UltraISO	B-Application
was	O
shareware	B-License
however	O
since	O
2006	O
it	O
has	O
turned	O
into	O
commercial	B-Application
software	I-Application
.	O
</s>
<s>
The	O
'	O
Free	O
Trial	O
 '	O
version	O
is	O
limited	O
to	O
ISO	B-General_Concept
images	I-General_Concept
of	O
300MB	O
or	O
less	O
,	O
effectively	O
making	O
it	O
Crippleware	O
.	O
</s>
<s>
UltraISO	B-Application
uses	O
a	O
proprietary	O
format	O
known	O
as	O
ISZ	O
.	O
</s>
<s>
The	O
format	O
is	O
advertised	O
as	O
"	O
ISO	B-General_Concept
Zipped	O
"	O
,	O
even	O
though	O
it	O
is	O
not	O
a	O
simple	O
zip	O
archive	O
.	O
</s>
<s>
The	O
format	O
uses	O
zlib	B-Language
or	O
bzip2	B-Application
to	O
compress	O
the	O
data	O
,	O
and	O
may	O
use	O
AES-128	B-Algorithm
,	O
192	O
or	O
256	O
encryption	O
in	O
the	O
CBC	O
mode	O
(	O
note	O
that	O
this	O
provides	O
no	O
integrity	O
protection	O
and	O
is	O
vulnerable	O
to	O
the	O
padding	B-Application
oracle	I-Application
attack	I-Application
)	O
.	O
</s>
<s>
The	O
format	O
is	O
now	O
supported	O
by	O
third	O
party	O
applications	O
such	O
as	O
Daemon	B-Application
Tools	I-Application
,	O
Alcohol	B-Application
120%	I-Application
and	O
CDemu	B-Language
.	O
</s>
