<s>
A	O
domain	B-Protocol
validated	I-Protocol
certificate	I-Protocol
(	O
DV	O
)	O
is	O
an	O
X.509	O
public	O
key	O
certificate	O
typically	O
used	O
for	O
Transport	B-Protocol
Layer	I-Protocol
Security	I-Protocol
(	O
TLS	O
)	O
where	O
the	O
domain	O
name	O
of	O
the	O
applicant	O
is	O
validated	O
by	O
proving	O
some	O
control	O
over	O
a	O
DNS	O
domain	O
.	O
</s>
<s>
Domain	B-Protocol
validated	I-Protocol
certificates	I-Protocol
were	O
first	O
distributed	O
by	O
GeoTrust	O
in	O
2002	O
before	O
becoming	O
a	O
widely	O
accepted	O
method	O
.	O
</s>
<s>
The	O
sole	O
criterion	O
for	O
a	O
domain	B-Protocol
validated	I-Protocol
certificate	I-Protocol
is	O
proof	O
of	O
control	O
over	O
whois	B-Protocol
records	O
,	O
DNS	O
records	O
file	O
,	O
email	O
or	O
web	O
hosting	O
account	O
of	O
a	O
domain	O
.	O
</s>
<s>
A	O
domain	B-Protocol
validated	I-Protocol
certificate	I-Protocol
is	O
distinct	O
from	O
an	O
Extended	B-Application
Validation	I-Application
Certificate	I-Application
in	O
that	O
this	O
is	O
the	O
only	O
requirement	O
for	O
issuing	O
the	O
certificate	O
.	O
</s>
<s>
In	O
particular	O
,	O
domain	B-Protocol
validated	I-Protocol
certificates	I-Protocol
do	O
not	O
assure	O
that	O
any	O
particular	O
legal	O
entity	O
is	O
connected	O
to	O
the	O
certificate	O
,	O
even	O
if	O
the	O
domain	O
name	O
may	O
imply	O
a	O
particular	O
legal	O
entity	O
controls	O
the	O
domain	O
.	O
</s>
<s>
As	O
the	O
low	O
assurance	O
requirements	O
allow	O
domain	B-Protocol
validated	I-Protocol
certificates	I-Protocol
to	O
be	O
issued	O
quickly	O
without	O
requiring	O
human	O
intervention	O
,	O
domain	B-Protocol
validated	I-Protocol
certificates	I-Protocol
have	O
a	O
number	O
of	O
unique	O
characteristics	O
:	O
</s>
<s>
Domain	B-Protocol
validated	I-Protocol
certificates	I-Protocol
are	O
used	O
in	O
automated	O
X.509	O
certificate	O
issuing	O
systems	O
,	O
such	O
as	O
Let	B-Application
's	I-Application
Encrypt	I-Application
.	O
</s>
<s>
Domain	B-Protocol
validated	I-Protocol
certificates	I-Protocol
are	O
often	O
cheap	O
or	O
free	O
.	O
</s>
<s>
Domain	B-Protocol
validated	I-Protocol
certificates	I-Protocol
can	O
be	O
generated	O
and	O
validated	O
without	O
any	O
documentation	O
.	O
</s>
<s>
Most	O
domain	B-Protocol
validated	I-Protocol
certificates	I-Protocol
can	O
be	O
issued	O
instantly	O
(	O
in	O
less	O
than	O
a	O
minute	O
)	O
via	O
special	O
tools	O
which	O
automate	O
issuing	O
process	O
.	O
</s>
