Nokia N97 mini User Manual page 139

automatically locks. A locked device cannot be used until
the correct lock code is entered. To turn off the autolock
period, select None.
Lock if SIM card changed — You can set the device to ask
for the lock code when an unknown SIM card is inserted
into your device. The device maintains a list of SIM cards
that are recognized as the owner's cards.
Remote phone locking — Enable or disable remote lock.
Closed user group — You can specify a group of people
to whom you can call and who can call you (network
service).
Confirm SIM services — You can set the device to display
confirmation messages when you are using a SIM card
service (network service).
Certificate management
Select Menu Settings
>
Security settings Certificate
>
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.
Select from the following:
Authority certificates — View and edit authority
certificates.
and Phone Phone mgmt.
>
management.
Trusted site certificates — View and edit trusted site
certificates.
Personal certificates — View and edit personal
certificates.
Phone certificates — View and edit device certificates.
Digital certificates do not guarantee safety; they are used
to verify the origin of 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 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.
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