Nokia 6820 User Manual page 104

M e n u f u n c t i o n s
• Change module PIN
the module PIN, if allowed by the
security module. Key in the
current module PIN code, then
key in the new code twice.
• Change signing
signing PIN that you want to
change. Key in the current PIN
code, then key in the new code
twice.
See also "Access codes"
ix.
Certificates
There are three kinds of certificates:
server certificates, authority
certificates and user certificates.
• The phone uses a server
certificate to improve security in
the connection between the
phone and the content server. The
phone receives the server
certificate from the service
provider before the connection is
established and its validity is
checked using the authority
certificates that are saved on the
phone. Server certificates are not
saved.
The security indicator
displayed during a connection if
the data transmission between
the phone and the content server
is encrypted.
92
to change
PIN. Select the
on page
is
Copyright © 2004 Nokia. All rights reserved.
• Authority certificates are used by
some services, such as banking,
for checking the validity of other
certificates. Authority
certificates can either be saved in
the security module by the
service provider, or they can be
downloaded from the network, if
the service supports the use of
authority certificates.
• User certificates are issued to
users by a Certifying Authority.
User certificates are required, for
example, to create a digital
signature.
Important: Note, however,
that even if the use of
certificates makes the risks
involved in remote
connections and software
installation considerably
smaller, they must be used
correctly in order to benefit
from increased security. The
existence of a certificate
does not offer any
protection by itself; the
certificate manager must
contain correct, authentic,
or trusted certificates for
increased security to be
available.