Nokia N81 - Manual (Page 121)

Settings
121
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 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 certificate details, scroll to a certificate, and
select
Options > Certificate details . When you open
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. See ‘Change the trust
settings’, p. 121.
• Expired certificate —The period of validity has ended
for the selected certificate.
• Certificate not valid yet —The period of validity has
not yet begun for the selected certificate.
• 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.
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.
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.
Select Options > Edit trust setting to change the value.
Security module
To view or edit a security module (if available) in Security
module , scroll to it, and press the scroll key. To view
detailed information about a security module, scroll to it,
and select
Options > Security details .
Factory settings
To reset some of the settings to their original values, select
Factory settings . To do this, you need the lock code. See
‘Phone and SIM card’, p. 119. After resetting, the device
may take a longer time to power on. Documents and files
are unaffected.