<s>
LEX	B-Algorithm
is	O
a	O
stream	B-Algorithm
cipher	I-Algorithm
based	O
on	O
the	O
round	O
transformation	O
of	O
AES	B-Algorithm
.	O
</s>
<s>
LEX	B-Algorithm
provides	O
the	O
same	O
key	O
agility	O
and	O
short	O
message	O
block	O
performance	O
as	O
AES	B-Algorithm
while	O
handling	O
longer	O
messages	O
faster	O
than	O
AES	B-Algorithm
.	O
</s>
<s>
In	O
addition	O
,	O
it	O
has	O
the	O
same	O
hardware	O
and	O
software	O
flexibility	O
as	O
AES	B-Algorithm
,	O
and	O
hardware	O
implementations	O
of	O
LEX	B-Algorithm
can	O
share	O
resources	O
with	O
AES	B-Algorithm
implementations	O
.	O
</s>
<s>
Designed	O
by	O
Alex	O
Biryukov	O
,	O
LEX	B-Algorithm
is	O
a	O
Phase	O
2	O
Focus	O
candidate	O
for	O
the	O
eSTREAM	O
project	O
.	O
</s>
<s>
A	O
new	O
revision	O
of	O
LEX	B-Algorithm
protects	O
against	O
a	O
slide	O
attack	O
found	O
in	O
an	O
earlier	O
version	O
.	O
</s>
