<s>
In	O
cryptography	O
,	O
NUSH	B-Algorithm
is	O
a	O
block	O
cipher	O
invented	O
by	O
Anatoly	O
Lebedev	O
and	O
Alexey	O
Volchkov	O
for	O
the	O
Russian	O
company	O
LAN	O
Crypto	O
.	O
</s>
<s>
NUSH	B-Algorithm
exists	O
in	O
several	O
different	O
variants	O
,	O
using	O
keys	O
of	O
128	O
,	O
192	O
,	O
or	O
256	O
bits	O
,	O
and	O
a	O
block	O
size	O
of	O
64	O
,	O
128	O
,	O
or	O
256	O
bits	O
.	O
</s>
<s>
The	O
algorithm	O
uses	O
key	B-Algorithm
whitening	I-Algorithm
,	O
but	O
no	O
S-boxes	B-Algorithm
;	O
the	O
only	O
operations	O
it	O
uses	O
are	O
AND	O
,	O
OR	O
,	O
XOR	B-Application
,	O
modular	O
addition	O
,	O
and	O
bit	O
rotation	O
.	O
</s>
<s>
It	O
has	O
been	O
shown	O
that	O
linear	O
cryptanalysis	O
can	O
break	O
NUSH	B-Algorithm
with	O
less	O
effort	O
than	O
a	O
brute	O
force	O
attack	O
.	O
</s>
