<s>
Argon2	B-Algorithm
is	O
a	O
key	B-Algorithm
derivation	I-Algorithm
function	I-Algorithm
that	O
was	O
selected	O
as	O
the	O
winner	O
of	O
the	O
2015	O
Password	O
Hashing	O
Competition	O
.	O
</s>
<s>
The	O
reference	O
implementation	O
of	O
Argon2	B-Algorithm
is	O
released	O
under	O
a	O
Creative	O
Commons	O
CC0	O
license	O
(	O
i.e.	O
</s>
<s>
public	O
domain	O
)	O
or	O
the	O
Apache	B-Application
License	I-Application
2.0	I-Application
,	O
and	O
provides	O
three	O
related	O
versions	O
:	O
</s>
<s>
According	O
to	O
the	O
Argon2	B-Algorithm
authors	O
,	O
this	O
attack	O
vector	O
was	O
fixed	O
in	O
version	O
1.3	O
.	O
</s>
<s>
The	O
Argon2	B-Algorithm
authors	O
claim	O
that	O
this	O
attack	O
is	O
not	O
efficient	O
if	O
Argon2i	O
is	O
used	O
with	O
three	O
or	O
more	O
passes	O
.	O
</s>
<s>
Argon2	B-Algorithm
makes	O
use	O
of	O
a	O
hash	O
function	O
capable	O
of	O
producing	O
digests	O
up	O
to	O
232	O
bytes	O
long	O
.	O
</s>
<s>
This	O
hash	O
function	O
is	O
internally	O
built	O
upon	O
Blake2	B-Algorithm
.	O
</s>
<s>
1024	O
bytes	O
for	O
Argon2	B-Algorithm
blocks	O
)	O
,	O
</s>
