Nokia 7250i

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2003 Nokia. All rights reserved.
Certificates
There are three kinds of certificates: server certificates, authority certificates and 
user certificates.
• The phone uses a server certificate to improve security in connection between 
the phone and the gateway. The phone receives the server certificate from the 
service provider before the connection is established and its validity is checked 
using the authority certificates saved in the phone. Server certificates are not 
saved.
The security indicator 
 is displayed during a connection, if the data 
transmission between the phone and the gateway (identified by the 
IP address
 
in the 
Edit active service settings
 - 
Bearer settings
) is encrypted.
However, the security indicator does not indicate that the data transmission 
between the gateway and the content server (place where the requested 
resource is saved) is secure. It is up to the service provider to secure the data 
transmission between the gateway and the content server.
• Authority certificates are used by some services, such as banking services, 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 make a digital signature and they associate the 
user with a specific private key in a security module.
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