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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 to your device,
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 (where the data is stored) is secure. The service provider secures the data
transmission between the gateway and the content server.
Digital signature
You can make digital signatures with your phone if your SIM card has a security
module. Using the digital signature can be the same as signing your name to a
paper bill, contract, or other document.
1. To make a digital signature, select a link on a web page, for example, the title
of a book you want to buy and its price. The text to sign, which may include the
amount and date, is shown.
Check that the header text is Read and that the digital signature icon is
displayed.
2. To sign the text, read all of the text first, and select Sign.
The text may not fit within a single screen. Therefore, ensure that you scroll
through and read all of the text before signing.
3. Select the user certificate you want to use. Enter the signing PIN. The digital
signature icon disappears, and the service may display a confirmation of your
purchase.
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