Nokia 8600 Luna - Manual (Page 76)

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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.
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.