<s>
The	O
Oakley	B-Protocol
Key	O
Determination	O
Protocol	O
is	O
a	O
key-agreement	B-Protocol
protocol	I-Protocol
that	O
allows	O
authenticated	O
parties	O
to	O
exchange	O
keying	O
material	O
across	O
an	O
insecure	O
connection	O
using	O
the	O
Diffie	B-Protocol
–	I-Protocol
Hellman	I-Protocol
key	I-Protocol
exchange	I-Protocol
algorithm	O
.	O
</s>
<s>
The	O
protocol	O
was	O
proposed	O
by	O
Hilarie	O
K	O
.	O
Orman	O
in	O
1998	O
,	O
and	O
formed	O
the	O
basis	O
for	O
the	O
more	O
widely	O
used	O
Internet	B-Protocol
Key	I-Protocol
Exchange	I-Protocol
protocol	O
.	O
</s>
<s>
The	O
Oakley	B-Protocol
protocol	I-Protocol
has	O
also	O
been	O
implemented	O
in	O
Cisco	O
Systems	O
 '	O
ISAKMP	B-Protocol
daemon	B-Operating_System
.	O
</s>
