<s>
The	O
IBM	B-Device
4764	I-Device
Cryptographic	O
Coprocessor	O
is	O
a	O
secure	O
cryptoprocessor	O
that	O
performs	O
cryptographic	O
operations	O
used	O
by	O
application	O
programs	O
and	O
by	O
communications	O
such	O
as	O
SSL	B-Protocol
private	B-Application
key	I-Application
transactions	O
associated	O
with	O
SSL	B-Protocol
digital	O
certificates	O
.	O
</s>
<s>
The	O
coprocessor	O
is	O
supported	O
on	O
all	O
IBM	O
server	O
platforms	O
including	O
System	B-Device
z	I-Device
(	O
mainframe	O
)	O
,	O
System	B-Device
i	I-Device
,	O
System	B-Device
p	I-Device
,	O
and	O
System	O
x	O
(	O
Linux	B-Application
or	O
Microsoft	B-Application
Windows	I-Application
)	O
.	O
</s>
<s>
On	O
System	B-Device
z	I-Device
,	O
it	O
is	O
called	O
the	O
"	O
Crypto	O
Express2	O
"	O
.	O
</s>
<s>
Applications	O
may	O
include	O
financial	O
PIN	O
transactions	O
,	O
bank-to-clearing-house	O
transactions	O
,	O
EMV	O
transactions	O
for	O
integrated	O
circuit	O
(	O
chip	O
)	O
based	O
credit	O
cards	O
,	O
and	O
general-purpose	O
cryptographic	O
applications	O
using	O
symmetric	B-Algorithm
key	I-Algorithm
algorithms	I-Algorithm
,	O
hashing	B-Algorithm
algorithms	O
,	O
and	O
public	B-Application
key	I-Application
algorithms	I-Application
.	O
</s>
<s>
As	O
of	O
June	O
2005	O
,	O
the	O
IBM	B-Device
4764	I-Device
superseded	O
the	O
IBM	B-Device
4758	I-Device
that	O
was	O
discontinued	O
.	O
</s>
<s>
At	O
the	O
end	O
of	O
December	O
2011	O
,	O
the	O
IBM	B-Device
4764	I-Device
was	O
discontinued	O
.	O
</s>
