<s>
In	O
computer	B-Architecture
networking	I-Architecture
,	O
Photuris	B-Protocol
is	O
a	O
session	O
key	O
management	O
protocol	O
defined	O
in	O
RFC	O
2522	O
.	O
</s>
<s>
Photuris	B-Protocol
is	O
the	O
Latin	O
name	O
of	O
a	O
genus	O
of	O
fireflies	B-Device
native	O
to	O
North	O
America	O
that	O
mimic	O
the	O
signals	O
of	O
other	O
firefly	B-Device
species	O
.	O
</s>
<s>
The	O
name	O
was	O
chosen	O
as	O
a	O
reference	O
to	O
the	O
(	O
classified	O
)	O
FIREFLY	B-Device
key	O
exchange	O
protocol	O
developed	O
by	O
the	O
National	O
Security	O
Agency	O
and	O
used	O
in	O
the	O
STU-III	O
secure	O
telephone	O
,	O
which	O
is	O
believed	O
to	O
operate	O
by	O
similar	O
principles	O
.	O
</s>
