<s>
ITU-T	O
Recommendation	O
X.1035	B-Protocol
specifies	O
a	O
password-authenticated	B-Protocol
key	I-Protocol
agreement	I-Protocol
protocol	O
that	O
ensures	O
mutual	O
authentication	O
of	O
two	O
parties	O
by	O
using	O
a	O
Diffie	B-Protocol
–	I-Protocol
Hellman	I-Protocol
key	I-Protocol
exchange	I-Protocol
to	O
establish	O
a	O
symmetric	O
cryptographic	O
key	O
.	O
</s>
<s>
The	O
use	O
of	O
Diffie-Hellman	B-Protocol
exchange	O
ensures	O
perfect	O
forward	O
secrecy	O
—	O
a	O
property	O
of	O
a	O
key	O
establishment	O
protocol	O
that	O
guarantees	O
that	O
compromise	O
of	O
a	O
session	O
key	O
or	O
long-term	O
private	O
key	O
after	O
a	O
given	O
session	O
does	O
not	O
cause	O
the	O
compromise	O
of	O
any	O
earlier	O
session	O
.	O
</s>
<s>
In	O
X.1035	B-Protocol
,	O
the	O
exchange	O
is	O
protected	O
from	O
the	O
man-in-the-middle	O
attack	O
.	O
</s>
<s>
X.1035	B-Protocol
was	O
approved	O
on	O
13	O
February	O
2007	O
by	O
ITU-T	O
Study	O
Group	O
17	O
.	O
</s>
<s>
G.hn,	O
an	O
ITU-T	O
standard	O
that	O
specifies	O
high-speed	O
(	O
up	O
to	O
1	O
Gbit/s	O
)	O
local	B-General_Concept
area	I-General_Concept
networking	I-General_Concept
over	O
existing	O
home	O
wires	O
(	O
power	O
lines	O
,	O
phone	O
lines	O
and	O
coaxial	O
cables	O
)	O
,	O
uses	O
X.1035	B-Protocol
for	O
authentication	O
and	O
key	O
exchange	O
.	O
</s>
