Nokia 6220

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Certificates
There are three kinds of certificates: server certificates, authority certificates and 
user certificates.
• The phone uses a server certificate to create a connection with improved 
security to the content server. 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 content server is encrypted.
• 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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