Nokia 3510i

Page 89
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Copyright
 © 
2002 Nokia. All rights reserved.
89
It is a resposibility of the service provider to secure the data transmission 
between the gateway and the content server.
• Authority certificates
Authority certificates are used by some WAP services, such as banking services, 
for checking the signatures of server certificates or other authority certificates. 
You can download authority certificates from WAP pages, if the WAP service 
supports the use of authority certificates. If you save the certificate, it is added 
to the certificate list on the phone. Authority certificates may also be available 
in the security module.
• User certificates
User certificates are issued to users by a Certifying Authority. They associate a 
user with a specific private key in a security module and they are saved in the 
module by the SIM card issuer or the service provider.
Digital signature
You can make digital signatures using your phone. The signature can be traced 
back to you via the private key and the associated certificate that was used for the 
signature. Using the digital signature can  be seen as the same as signing your 
name to a paper bill, contract or other document.
To use the digital signature, select a link on a WAP page, for example, the title of a 
book you want to buy and its price. The text to be signed, possibly including the 
amount and date, for example, will be shown. 
Check that the header text is 
Read
 and the digital signature icon 
 is shown. 
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