<s>
Delegated	B-Protocol
Path	I-Protocol
Discovery	I-Protocol
(	O
DPD	O
)	O
is	O
a	O
method	O
for	O
querying	O
a	O
trusted	O
server	B-Application
for	O
information	O
about	O
a	O
public	O
key	O
certificate	O
.	O
</s>
<s>
DPD	O
allows	O
clients	B-Protocol
to	O
obtain	O
collated	O
certificate	O
information	O
from	O
a	O
trusted	O
DPD	O
server	B-Application
.	O
</s>
