PoE
AP
Router
144
3.5
Certificate
In
cryptography,
a
public
key
certificate
(also
known
as
a
digital
certificate
or
identity
certificate)
is
an
electronic
document
used
to
prove
ownership
of
a
public
key.
The
certificate
includes
information
about
the
key,
information
about
its
owner's
identity,
and
the
digital
signature
of
an
entity
that
has
verified
the
certificate's
contents
are
genuine.
If
the
signature
is
valid,
and
the
person
examining
the
certificate
trusts
the
signer,
then
they
know
they
can
use
that
key
to
communicate
with
its
owner
3
.
In
a
typical
public
‐
key
infrastructure
(PKI)
scheme,
the
signer
is
a
certificate
authority
(CA),
usually
a
company
such
as
VeriSign
which
charges
customers
to
issue
certificates
for
them.
In
a
web
of
trust
scheme,
the
signer
is
either
the
key's
owner
(a
self
‐
signed
certificate)
or
other
users
("endorsements")
whom
the
person
examining
the
certificate
might
know
and
trust.
The
device
also
plays
as
a
CA
role.
Certificates
are
an
important
component
of
Transport
Layer
Security
(TLS,
sometimes
called
by
its
older
name
SSL),
where
they
prevent
an
attacker
from
impersonating
a
secure
website
or
other
server.
They
are
also
used
in
other
important
applications,
such
as
encryption
and
code
signing.
Here,
it
can
be
used
in
IPSec
tunneling
for
user
authentication.
3.5.1
Configuration
The
configuration
setting
allows
user
to
create
Root
Certificate
Authority
(CA)
certificate
and
configure
to
set
enable
of
SCEP.
Root
CA
is
the
top
‐
most
certificate
of
the
tree,
the
private
key
of
which
is
used
to
"sign"
other
certificates.
Go
to
Object
Definition
>
Certificate
>
Configuration
tab.
Create
Root
CA
When
Generate
button
is
applied,
Root
CA
Certificate
Configuration
screen
will
appear.
The required
information to be filled for the root CA includes the name, key, subject name and validity.
3 http://en.wikipedia.org/wiki/Public_key_certificate.
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