Nokia N97 User Manual page 129

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.
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.
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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
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.
Options
>
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