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Certificates
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 an
Expired or a Certificate
that is not valid yet is
shown even if the
certificate should be valid,
check that the current
date and time in your
device are correct.
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.
There are three kinds of
certificates: server certificates,
authority certificates, and user
certificates. You may receive these
86
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certificates from your service
provider. Authority certificates
and user certificates may also be
saved in the security module by
the service provider.
To view the list of the authority or
user certificates downloaded into
your phone, select
Settings
>
Security settings
Authority certificates
certificates.
The security indicator
displayed during a connection, if
the data transmission between the
phone and the content server is
encrypted.
The security icon does not indicate
that the data transmission
between the gateway and the
content server (or place where the
requested resource is stored) is
secure. The service provider
secures the data transmission
between the gateway and the
content server.
Digital signature
You can make digital signatures
with your phone if your SIM card
has a security module. Using the
digital signature can be the same
as signing your name to a paper
bill, contract, or other document.
To make a digital signature, select
a link on a page, for example, the
Menu
>
>
or
User
is
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