<s>
Kalyna	B-Algorithm
(	O
Ukrainian	O
:	O
Калина	O
,	O
Viburnum	O
opulus	O
)	O
is	O
a	O
symmetric	O
block	O
cipher	O
.	O
</s>
<s>
Kalyna	B-Algorithm
was	O
adopted	O
as	O
the	O
national	O
encryption	O
standard	O
of	O
Ukraine	O
in	O
2015	O
(	O
standard	O
DSTU	O
7624:2014	O
)	O
after	O
holding	O
Ukrainian	O
national	O
cryptographic	O
competition	O
.	O
</s>
<s>
Kalyna	B-Algorithm
is	O
a	O
substitution	B-Algorithm
–	I-Algorithm
permutation	I-Algorithm
network	I-Algorithm
and	O
its	O
design	O
is	O
based	O
on	O
the	O
Rijndael	B-Algorithm
(	O
AES	B-Algorithm
)	O
encryption	O
function	O
having	O
quite	O
different	O
key	O
schedule	O
,	O
another	O
set	O
of	O
four	O
different	O
S-boxes	O
and	O
increased	O
MDS	B-General_Concept
matrix	I-General_Concept
size	O
.	O
</s>
<s>
Kalyna	B-Algorithm
has	O
10	O
rounds	O
for	O
128-bit	O
keys	O
,	O
14	O
rounds	O
for	O
256-bit	O
keys	O
and	O
18	O
rounds	O
for	O
512-bit	O
keys	O
.	O
</s>
<s>
Independent	O
researchers	O
proposed	O
some	O
attacks	O
on	O
reduced-round	O
variants	O
of	O
Kalyna	B-Algorithm
,	O
but	O
all	O
of	O
them	O
have	O
a	O
very	O
high	O
complexity	O
and	O
none	O
of	O
them	O
are	O
practical	O
.	O
</s>
