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■ Cache memory
A cache is a memory location that is used to store data temporarily. If you have tried to
access or have accessed confidential information requiring passwords, empty the cache
after each use. The information or services you have accessed is stored in the cache.
To empty the cache while browsing, select Options > Other options > Clear the cache; in the
standby mode, select Menu > Web > Clear the cache.
■ Browser security
Security features may be required for some services, such as online banking or shopping. For
such connections you need security certificates and possibly a security module, which may
be available on your SIM card. For more information, contact your service provider.
Security module
The security module improves security services for applications requiring a browser
connection, and allows you to use a digital signature. The security module may contain
certificates as well as private and public keys. The certificates are saved in the security
module by the service provider.
To view or change the security module settings, select Menu > Settings > Security >
Security module settings.
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 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.
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 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
Menu > Settings > Security > Authority certificates or User certificates.
is displayed during a connection, if the data transmission between the phone and the
content server is encrypted.
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