Nokia 6630 User Manual page 103

Closed user group (network service) - To specify a group of people to whom you can call
and who can call you.
Confirm SIM services (network service) - To set the phone to display confirmation
messages when you are using a SIM card service.
Certif. management
Digital certificates do not guarantee safety; they are used to verify the origins of software.
In the Certificate management main view, you can see a list of authority certificates that
have been stored in your phone. Press
Digital certificates should be used if you want to connect to an online bank or another site
or remote server for actions that involve transferring confidential information. They should
also be used if you want to reduce the risk of viruses or other malicious software and be
sure of the authenticity of software when downloading and installing software.
Important: 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.
Certificates have a restricted lifetime. If Expired certificate or Certificate not valid
yet is shown even if the certificate should be valid, check that the current date
and time in your phone are correct.
Viewing certificate details - checking authenticity
You can only be sure of the correct identity of a server when the signature and the period
of validity of a server certificate have been checked.
You will be notified on the phone display if the identity of the server is not authentic or if
you do not have the correct security certificate in your phone.
to see a list of personal certificates, if available.
Glossary: Digital
certificates are used to
verify the origin of the
XHTML or WML pages and
installed software.
However, they can only be
trusted if the origin of the
certificate is known to be
authentic.
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