<s>
Panama	B-Algorithm
is	O
a	O
cryptographic	O
primitive	O
which	O
can	O
be	O
used	O
both	O
as	O
a	O
hash	B-Error_Name
function	I-Error_Name
and	O
a	O
stream	B-Algorithm
cipher	I-Algorithm
,	O
but	O
its	O
hash	B-Error_Name
function	I-Error_Name
mode	O
of	O
operation	O
has	O
been	O
broken	O
and	O
is	O
not	O
suitable	O
for	O
cryptographic	O
use	O
.	O
</s>
<s>
Based	O
on	O
StepRightUp	O
,	O
it	O
was	O
designed	O
by	O
Joan	O
Daemen	O
and	O
Craig	O
Clapp	O
and	O
presented	O
in	O
the	O
paper	O
Fast	O
Hashing	O
and	O
Stream	O
Encryption	O
with	O
PANAMA	B-Algorithm
on	O
the	O
Fast	O
Software	O
Encryption	O
(	O
FSE	O
)	O
conference	O
1998	O
.	O
</s>
<s>
The	O
cipher	O
has	O
influenced	O
several	O
other	O
designs	O
,	O
for	O
example	O
MUGI	B-Algorithm
and	O
SHA-3	B-Algorithm
.	O
</s>
<s>
The	O
primitive	O
can	O
be	O
used	O
both	O
as	O
a	O
hash	B-Error_Name
function	I-Error_Name
and	O
a	O
stream	B-Algorithm
cipher	I-Algorithm
.	O
</s>
<s>
The	O
stream	B-Algorithm
cipher	I-Algorithm
uses	O
a	O
256-bit	O
key	O
and	O
the	O
performance	O
of	O
the	O
cipher	O
is	O
very	O
good	O
reaching	O
2	O
cycles	O
per	O
byte	O
.	O
</s>
<s>
As	O
a	O
hash	B-Error_Name
function	I-Error_Name
,	O
collisions	O
have	O
been	O
shown	O
by	O
Vincent	O
Rijmen	O
et	O
al	O
.	O
</s>
<s>
in	O
the	O
paper	O
Producing	O
Collisions	O
for	O
PANAMA	B-Algorithm
presented	O
at	O
FSE	O
2001	O
.	O
</s>
<s>
At	O
FSE	O
2007	O
,	O
Joan	O
Daemen	O
and	O
Gilles	O
Van	O
Assche	O
presented	O
a	O
practical	O
attack	O
on	O
the	O
Panama	B-Algorithm
hash	B-Error_Name
function	I-Error_Name
that	O
generates	O
a	O
collision	O
in	O
26	O
evaluations	O
of	O
the	O
state	O
updating	O
function	O
.	O
</s>
<s>
Guido	O
Bertoni	O
,	O
Joan	O
Daemen	O
,	O
Michaël	O
Peeters	O
,	O
and	O
Gilles	O
Van	O
Assche	O
,	O
at	O
NIST	O
's	O
2006	O
Second	O
Cryptographic	O
Hash	B-Error_Name
Workshop	O
,	O
unveiled	O
a	O
Panama	B-Algorithm
variant	O
called	O
RadioGatún	B-Algorithm
.	O
</s>
<s>
The	O
hash	B-Error_Name
function	I-Error_Name
workings	O
of	O
RadioGatún	B-Algorithm
does	O
not	O
have	O
the	O
known	O
weaknesses	O
that	O
Panama	B-Algorithm
's	O
hash	B-Error_Name
function	I-Error_Name
has	O
.	O
</s>
<s>
In	O
turn	O
,	O
RadioGatún	B-Algorithm
inspired	O
the	O
new	O
cryptographic	O
standard	O
SHA-3	B-Algorithm
.	O
</s>
