Nokia X6-00 16GB - Manual (Page 157)

Connection security
With a secure connection and security certificates, you can safely browse the
internet.
If the security indicator ( ) is displayed during a connection, the data transmission
between the device and the internet gateway or server is encrypted.
The security icon does not indicate that the data transmission between the gateway
and the content server (where the data is stored) is secure. The service provider
secures the data transmission between the gateway and the content server.
Security certificates may be required for some services, such as banking services.
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. For more information, contact your
service provider.
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.
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