Nokia XpressMusic 5700 User Manual

Page 80

S e t t i n g s

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 device are correct.

Before changing any certificate settings, you must
make sure that you really trust the owner of the
certificate and that the certificate really belongs
to the listed owner.

View certificate details and check 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.

The phone notifies you if the identity of the server is not
authentic or if you do not have the correct security
certificate in your phone.

To check certificate details, scroll to a certificate, and
select

Options

Certificate details

. While opening the

certificate details, the phone checks the validity of the
certificate and one of the following notes may appear:

Expired certificate

—The validity period has ended for the

selected certificate.

Certificate not valid yet

—The validity period has not yet

begun for the selected certificate.

Certificate corrupted

—The certificate cannot be used.

Contact the certificate issuer.

Certificate not trusted

—You have not set any application

to use the certificate.

Change the trust settings

Before changing any certificate settings, you must make
sure that you really trust the owner of the certificate and
that the certificate really belongs to the listed owner.

Scroll to an authority certificate, and select

Options

Trust settings

. Depending on the certificate, a list of the

applications that can use the selected certificate is shown.

Security module

View or edit security modules.

Factory settings

Reset some of the settings to their original values. You
need the lock code. See

“Lock code”,