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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 into
your phone, 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 (or place where the requested resource 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.
To make a digital signature, select a link on a page, for example, the title
of the 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 shown.
If the digital signature icon does not appear, there is a security breach,
and you should not enter any personal data such as your signing PIN.
To sign the text, read all of the text first, and select Sign.
The text may not fit within a single screen. Therefore, make sure to scroll
through and read all of the text before signing.
Select the user certificate you want to use. Enter the signing PIN (see
"Access codes," p. 10), and select OK. The digital signature icon
disappears, and the service may display a confirmation of your purchase.
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