Nokia 6820 User Manual page 157

its validity is checked using the authority certificates that are saved on the
phone. Server certificates are not saved.
The security indicator
transmission between the phone and the content server is encrypted.
• Authority certificates are used by some services, such as banking, for checking
the validity of other certificates. Authority certificates can either be saved in
the security module by the service provider, or they can be downloaded from
the network, if the service supports the use of authority certificates.
• User certificates are issued to users by a Certifying Authority. User certificates
are required, for example, to create a digital signature.
Important: Note, however, that 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.
Important: 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 phone are correct.
Important: Before changing these settings, you must make sure that
you really trust the owner of the certificate and that the certificate
really belongs to the listed owner.
is displayed during a connection if the data
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