Nokia 5800EN - Manual (Page 99)

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.
View certificate details — check authenticity
You can only be sure of the correct identity of a server when
the signature and the validity period of a server certificate
have been checked.
You are notified if the identity of the server is not authentic
or if you do not have the correct security certificate in your
device.
To check the details of a certificate, select
Options >
Certificate details . The validity of the certificate is checked,
and one of the following notes may be displayed:
●
Certificate not trusted — You have not set any
application to use the certificate.
● Expired certificate — The certificate validity period has
ended.
● Certificate not valid yet — The certificate validity period
has not yet begun.
● Certificate corrupted — The certificate cannot be used.
Contact the certificate issuer.
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.
To change the settings for an authority certificate, select
Options > Trust settings . Depending on the certificate, a
list of the applications that can use the selected certificate is
shown. For example:
●
Symbian installation : Yes — The certificate is able to
certify the origin of a new Symbian operating system
application.
● Internet : Yes — The certificate is able to certify servers.
● App. installation : Yes — The certificate is able to certify
the origin of a new Java™ application.
To change the value, select Options > Change trust
setting .
Security module
Select
Menu > Settings and Phone > Phone mgmt. >
Security > Security module .
To view or edit a security module (if available), select it from
the list.
To view detailed information about a security module, select
Options > Security details .
Settings
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