<s>
WinRAR	B-Application
is	O
a	O
trialware	O
file	B-Application
archiver	I-Application
utility	O
for	O
Windows	O
,	O
developed	O
by	O
Eugene	O
Roshal	O
of	O
win.rar	O
GmbH	O
.	O
</s>
<s>
It	O
can	O
create	O
and	O
view	O
archives	O
in	O
RAR	O
or	O
ZIP	B-General_Concept
file	I-General_Concept
formats	I-General_Concept
,	O
and	O
unpack	O
numerous	O
archive	O
file	O
formats	O
.	O
</s>
<s>
To	O
enable	O
the	O
user	O
to	O
test	O
the	O
integrity	O
of	O
archives	O
,	O
WinRAR	B-Application
embeds	O
CRC32	O
or	O
BLAKE2	B-Algorithm
checksums	B-Algorithm
for	O
each	O
file	O
in	O
each	O
archive	O
.	O
</s>
<s>
WinRAR	B-Application
supports	O
creating	O
encrypted	O
,	O
multi-part	O
and	O
self-extracting	B-General_Concept
archives	I-General_Concept
.	O
</s>
<s>
WinRAR	B-Application
is	O
a	O
Windows-only	O
program	O
.	O
</s>
<s>
An	O
Android	B-Application
application	I-Application
called	O
"	O
RAR	O
for	O
Android	B-Application
"	O
is	O
also	O
available	O
.	O
</s>
<s>
Related	O
programs	O
include	O
the	O
command-line	O
utilities	O
"	O
RAR	O
"	O
and	O
"	O
UNRAR	O
"	O
and	O
versions	O
for	O
macOS	B-Application
,	O
Linux	B-Application
,	O
FreeBSD	B-Operating_System
,	O
Windows	O
CE	O
,	O
and	O
MS-DOS	B-Application
.	O
</s>
<s>
WinRAR	B-Application
and	O
the	O
RAR	O
file	O
format	O
have	O
evolved	O
over	O
time	O
.	O
</s>
<s>
Support	O
for	O
the	O
archive	B-General_Concept
format	I-General_Concept
RAR5	B-Application
,	O
using	O
the	O
same	O
RAR	O
file	O
extension	O
as	O
earlier	O
versions	O
,	O
was	O
added	O
in	O
version	O
5.0	O
;	O
the	O
older	O
RAR	O
file	O
format	O
has	O
since	O
been	O
referred	O
to	O
as	O
RAR4	O
.	O
</s>
<s>
WinRAR	B-Application
versions	O
before	O
5.0	O
do	O
not	O
support	O
RAR5	B-Application
archives	O
;	O
only	O
older	O
versions	O
of	O
WinRAR	B-Application
run	O
on	O
Windows	O
versions	O
prior	O
to	O
Windows	B-Application
Vista	I-Application
,	O
and	O
cannot	O
open	O
RAR5	B-Application
archives	O
.	O
</s>
<s>
The	O
RAR5	B-Application
file	O
format	O
increased	O
the	O
maximum	O
dictionary	O
size	O
to	O
1	O
GB	O
;	O
11	O
different	O
compression	O
directory	O
sizes	O
from	O
1	O
MB	O
to	O
1	O
GB	O
are	O
available	O
,	O
with	O
the	O
default	O
in	O
version	O
5	O
increased	O
from	O
4	O
MB	O
to	O
32	O
MB	O
,	O
typically	O
improving	O
compression	O
ratio	O
.	O
</s>
<s>
AES	B-Algorithm
encryption	I-Algorithm
,	O
when	O
used	O
,	O
is	O
in	O
CBC	O
mode	O
and	O
was	O
increased	O
in	O
strength	O
from	O
128	O
-	O
to	O
256-bit	O
.	O
</s>
<s>
Maximum	O
path	O
length	O
for	O
files	O
in	O
RAR	O
and	O
ZIP	B-General_Concept
archives	I-General_Concept
is	O
increased	O
to	O
2,048	O
characters	O
.	O
</s>
<s>
Options	O
added	O
in	O
v5.0	O
include	O
256-bit	O
BLAKE2	B-Algorithm
file-hashing	O
algorithm	O
instead	O
of	O
default	O
32-bit	O
CRC32	O
,	O
duplicate	O
file	O
detection	O
,	O
NTFS	B-Application
hard	O
and	O
symbolic	O
links	O
,	O
and	O
Quick	O
Open	O
record	O
to	O
allow	O
large	O
archives	O
to	O
be	O
opened	O
faster	O
.	O
</s>
<s>
The	O
RAR5	B-Application
file	O
format	O
removed	O
comments	O
for	O
each	O
file	O
(	O
though	O
archive	O
comment	O
still	O
remains	O
)	O
,	O
authenticity	O
verification	O
,	O
and	O
specialized	O
compression	O
algorithms	O
for	O
text	O
and	O
multimedia	O
files	O
.	O
</s>
<s>
RAR5	B-Application
also	O
changed	O
the	O
file	O
name	O
for	O
split	O
volumes	O
from	O
"	O
archivename.rNN	O
"	O
to	O
"	O
archivename.partNN.rar	O
"	O
.	O
</s>
<s>
Creation	O
of	O
packed	O
RAR	O
or	O
ZIP	B-General_Concept
archives	I-General_Concept
.	O
</s>
<s>
Although	O
archiving	O
with	O
the	O
RAR	O
format	O
is	O
proprietary	O
,	O
RARLAB	O
supplies	O
as	O
copyrighted	O
freeware	B-License
the	O
C++	B-Language
source	O
code	O
of	O
the	O
current	O
UnRAR	O
unpacker	O
,	O
with	O
a	O
license	O
allowing	O
it	O
to	O
be	O
used	O
in	O
any	O
software	O
,	O
thus	O
enabling	O
others	O
to	O
produce	O
software	O
capable	O
of	O
unpacking	O
,	O
but	O
not	O
creating	O
,	O
RAR	O
archives	O
.	O
</s>
<s>
RAR	O
for	O
Android	B-Application
is	O
free	O
of	O
charge	O
.	O
</s>
<s>
A	O
license	O
for	O
WinRAR	B-Application
does	O
not	O
provide	O
ad-suppression	O
for	O
RAR	O
for	O
Android	B-Application
.	O
</s>
<s>
In	O
February	O
2019	O
,	O
a	O
major	O
security	O
vulnerability	O
in	O
the	O
unacev2.dll	O
library	O
which	O
is	O
used	O
by	O
WinRAR	B-Application
to	O
decompress	O
ACE	B-General_Concept
archives	O
was	O
discovered	O
.	O
</s>
<s>
Consequently	O
,	O
WinRAR	B-Application
dropped	O
the	O
support	O
for	O
the	O
ACE	B-General_Concept
format	O
from	O
version	O
5.70	O
.	O
</s>
<s>
Self-extracting	B-General_Concept
archives	I-General_Concept
created	O
with	O
versions	O
before	O
5.31	O
(	O
including	O
the	O
executable	O
installer	O
of	O
WinRAR	B-Application
itself	O
)	O
are	O
vulnerable	O
to	O
DLL	O
hijacking	O
:	O
they	O
may	O
load	O
and	O
use	O
DLLs	O
named	O
UXTheme.dll	O
,	O
RichEd32.dll	O
and	O
RichEd20.dll	O
if	O
they	O
are	O
in	O
the	O
same	O
folder	O
as	O
the	O
executable	O
file	O
.	O
</s>
<s>
It	O
was	O
widely	O
reported	O
that	O
WinRAR	B-Application
v5.21	O
and	O
earlier	O
had	O
a	O
remote	O
code	O
execution	O
(	O
RCE	O
)	O
vulnerability	O
which	O
could	O
allow	O
a	O
remote	O
attacker	O
to	O
insert	O
malicious	O
code	O
into	O
a	O
self-extracting	B-General_Concept
executable	I-General_Concept
(	O
SFX	O
)	O
file	O
being	O
created	O
by	O
a	O
user	O
,	O
"	O
putting	O
over	O
500	O
million	O
users	O
of	O
the	O
software	O
at	O
risk	O
"	O
.	O
</s>
<s>
However	O
,	O
examination	O
of	O
the	O
claim	O
revealed	O
that	O
,	O
while	O
the	O
vulnerability	O
existed	O
,	O
the	O
result	O
was	O
merely	O
an	O
SFX	O
which	O
delivered	O
its	O
payload	O
when	O
executed	O
;	O
published	O
responses	O
dismissed	O
the	O
threat	O
,	O
one	O
saying	O
"	O
If	O
you	O
can	O
find	O
suckers	O
who	O
will	O
trust	O
a	O
.exe	O
labelled	O
as	O
self-extracting	B-General_Concept
archive	I-General_Concept
...	O
then	O
you	O
can	O
trick	O
them	O
into	O
running	O
your	O
smuggled	O
JavaScript	O
"	O
.	O
</s>
<s>
Early	O
development	O
version	O
WinRAR	B-Application
1.54b	O
was	O
released	O
in	O
1995	O
as	O
Windows	O
3.x	O
software	O
.	O
</s>
<s>
3.00	O
(	O
2002-05	O
)	O
:	O
the	O
new	O
RAR3	O
archive	B-General_Concept
format	I-General_Concept
is	O
implemented	O
.	O
</s>
<s>
The	O
new	O
archives	O
cannot	O
be	O
managed	O
by	O
older	O
versions	O
of	O
WinRAR	B-Application
.	O
</s>
<s>
3.41	O
(	O
2004-12	O
)	O
:	O
adds	O
support	O
for	O
Linux	B-Application
.Z	B-Device
archives	O
like	O
GZIP	O
and	O
BZIP2	O
.	O
</s>
<s>
New	O
options	O
include	O
storing	O
entire	O
file	O
paths	O
and	O
restoring	O
compressed	O
NTFS	B-Application
files	O
.	O
</s>
<s>
3.50	O
(	O
2005-08	O
)	O
:	O
adds	O
support	O
for	O
interface	O
skins	B-Application
and	O
Windows	B-Operating_System
XP	I-Operating_System
Professional	I-Operating_System
x64	I-Operating_System
Edition	I-Operating_System
.	O
</s>
<s>
3.60	O
(	O
2006-08	O
)	O
:	O
adds	O
multithreaded	O
version	O
of	O
the	O
compression	O
algorithm	O
,	O
which	O
improves	O
compression	O
speed	O
on	O
systems	O
with	O
multiple	O
dual-core	B-Architecture
or	O
hyper-threading-enabled	O
CPUs	B-General_Concept
.	O
</s>
<s>
3.80	O
(	O
2008-09	O
)	O
:	O
adds	O
support	O
for	O
ZIP	B-General_Concept
archives	I-General_Concept
,	O
which	O
contain	O
Unicode	O
file	O
names	O
in	O
UTF-8	O
.	O
</s>
<s>
3.90	O
(	O
2009-05	O
)	O
:	O
adds	O
support	O
for	O
the	O
x86-64	B-Device
architecture	O
and	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
Windows	B-Device
98	I-Device
,	O
Windows	B-Device
ME	I-Device
,	O
and	O
Windows	B-Device
NT	I-Device
are	O
no	O
longer	O
supported	O
;	O
the	O
minimum	O
Windows	O
version	O
required	O
is	O
Windows	B-Application
2000	I-Application
.	O
</s>
<s>
4.10	O
(	O
2012-01	O
)	O
:	O
removes	O
all	O
ZIP	B-General_Concept
limitations	O
now	O
allowing	O
unlimited	O
number	O
of	O
files	O
and	O
archive	O
size	O
.	O
</s>
<s>
WinRAR	B-Application
now	O
also	O
allows	O
creation	O
of	O
multivolume	O
ZIP	B-General_Concept
files	I-General_Concept
.	O
</s>
<s>
ZIP	B-General_Concept
archives	I-General_Concept
now	O
include	O
Unicode	O
file	O
names	O
.	O
</s>
<s>
4.20	O
(	O
2012-06	O
)	O
:	O
compression	O
speed	O
in	O
SMP	B-Operating_System
mode	O
is	O
increased	O
significantly	O
,	O
but	O
this	O
improvement	O
was	O
made	O
at	O
the	O
expense	O
of	O
increased	O
memory	O
usage	O
.	O
</s>
<s>
ZIP	B-General_Concept
compression	O
now	O
uses	O
SMP	B-Operating_System
as	O
well	O
.	O
</s>
<s>
The	O
default	O
SMP	B-Operating_System
mode	O
cannot	O
handle	O
text	O
;	O
text	O
compression	O
is	O
significantly	O
worse	O
unless	O
additional	O
switches	O
are	O
used	O
.	O
</s>
<s>
Also	O
,	O
Windows	B-Application
2000	I-Application
compatibility	O
was	O
removed	O
.	O
</s>
<s>
5.00	O
(	O
2013-09	O
)	O
:	O
the	O
RAR5	B-Application
archive	B-General_Concept
format	I-General_Concept
is	O
implemented	O
.	O
</s>
<s>
RAR5	B-Application
compressed	O
archives	O
cannot	O
be	O
managed	O
by	O
old	O
versions	O
of	O
WinRAR	B-Application
.	O
</s>
<s>
The	O
RAR	O
5	O
format	O
improves	O
multi-core	B-Architecture
processor	I-Architecture
utilization	O
,	O
and	O
adds	O
a	O
larger	O
dictionary	O
size	O
of	O
up	O
to	O
1	O
GiB	O
with	O
64-bit	O
WinRAR	B-Application
.	O
</s>
<s>
Special	O
optional	O
compression	O
algorithms	O
optimized	O
for	O
RGB	O
bitmaps	O
,	O
raw	O
audio	O
files	O
,	O
Itanium	B-General_Concept
executables	O
,	O
and	O
plain	O
text	O
,	O
which	O
were	O
supported	O
by	O
earlier	O
versions	O
,	O
are	O
supported	O
only	O
in	O
the	O
older	O
RAR	O
format	O
,	O
not	O
RAR5	B-Application
.	O
</s>
<s>
Optional	O
optimized	O
compression	O
of	O
x86	B-Operating_System
executables	O
and	O
delta	B-Algorithm
compression	I-Algorithm
(	O
for	O
structured	O
table	O
data	O
)	O
are	O
supported	O
in	O
both	O
file	O
formats	O
.	O
</s>
<s>
5.50	O
(	O
2017-08	O
)	O
:	O
adds	O
support	O
for	O
a	O
master	O
password	O
which	O
can	O
be	O
used	O
to	O
encrypt	O
passwords	O
stored	O
in	O
WinRAR	B-Application
.	O
</s>
<s>
Adds	O
support	O
for	O
decompressing	O
Lzip	B-Application
archives	O
;	O
adds	O
support	O
for	O
high	O
precision	O
file	O
dates	O
,	O
longer	O
file	O
names	O
and	O
larger	O
file	O
sizes	O
for	O
TAR	B-Application
archives	I-Application
.	O
</s>
<s>
5.60	O
(	O
2018-06	O
)	O
:	O
repairing	O
of	O
protected	O
RAR5	B-Application
archives	O
was	O
improved	O
.	O
</s>
<s>
Automatic	O
detection	O
of	O
the	O
encoding	O
of	O
ZIP	B-General_Concept
archive	I-General_Concept
comments	O
.	O
</s>
<s>
5.70	O
(	O
2019-02	O
)	O
:	O
removes	O
support	O
for	O
ACE	B-General_Concept
archive	O
decompression	O
due	O
to	O
major	O
security	O
vulnerabilities	O
in	O
the	O
unacev2.dll	O
library	O
.	O
</s>
<s>
6.10	O
(	O
2022-01	O
)	O
:	O
Dropped	O
Windows	B-Application
XP	I-Application
support	O
.	O
</s>
<s>
Added	O
support	O
for	O
unpacking	O
ZST	B-Language
archives	O
.	O
</s>
<s>
WinRAR	B-Application
and	O
Android	B-Application
RAR	O
are	O
not	O
affected	O
.	O
</s>
<s>
RAR	O
2.50	O
(	O
1999	O
)	O
is	O
the	O
last	O
version	O
that	O
supports	O
MS-DOS	B-Application
and	O
OS/2	B-Application
on	O
16-bit	O
x86	B-Operating_System
CPUs	B-General_Concept
(	O
8086-compatible	O
)	O
.	O
</s>
<s>
RAR	O
3.93	O
is	O
the	O
last	O
version	O
for	O
MS-DOS	B-Application
and	O
OS/2	B-Application
on	O
IA-32	B-Device
CPUs	B-General_Concept
(	O
80386	B-General_Concept
equivalents	O
and	O
later	O
)	O
.	O
</s>
<s>
It	O
supports	O
file	O
names	O
longer	O
than	O
the	O
MS-DOS	B-Application
standard	O
of	O
8.3	O
characters	O
,	O
in	O
a	O
Windows	O
DOS	O
box	O
(	O
except	O
under	O
Windows	B-Device
NT	I-Device
)	O
,	O
and	O
uses	O
the	O
RSX	B-Device
DPMI	O
extender	O
.	O
</s>
<s>
WinRAR	B-Application
2.06	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Application
3.1	I-Application
,	O
Windows	B-Device
NT	I-Device
3.1	I-Device
,	O
Windows	B-Device
NT	I-Device
3.5	I-Device
,	O
Windows	B-Device
NT	I-Device
3.51	I-Device
and	O
Win32s	B-Library
.	O
</s>
<s>
WinRAR	B-Application
3.93	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Application
95	I-Application
,	O
98	B-Device
,	O
ME	B-Device
,	O
and	O
NT	B-Device
4.0	I-Device
.	O
</s>
<s>
RAR	O
for	O
Pocket	O
PC	O
3.93	O
is	O
the	O
last	O
version	O
for	O
Windows	B-Operating_System
Mobile	I-Operating_System
.	O
</s>
<s>
WinRAR	B-Application
4.11	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Application
2000	I-Application
.	O
</s>
<s>
WinRAR	B-Application
6.02	O
is	O
the	O
last	O
version	O
to	O
support	O
Windows	B-Application
XP	I-Application
.	O
</s>
