Menu functions
Copyright © 2004 Nokia. All rights reserved.
79
Important: Before changing these
settings, you must make sure that
you really trust the owner of the
certificate and that the certificate
really belongs to the listed owner.
Digital signature
You can make digital signatures with
your phone if your SIM card has a
security module. The signature can
be traced back to you via the private
key on the security module and the
user certificate that was used to
perform the signature. 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 (possibly
including amount, date, etc.) will be
shown.
Check that the header text is Read
and that the digital signature icon
is shown.
Note: 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 then you can select Sign.
Note: 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. Key in the signing PIN (see
”General information” on page 7)
and press OK. The digital signature
icon will disappear, and the service
may display a confirmation of your
purchase.
■ SIM services
Your SIM card may provide
additional services that you can
access in this menu that is shown
only if it is supported by your SIM
card. The name and contents of the
menu depend entirely on the service
available.
Note: For availability, rates
and information on using
SIM services, contact your
SIM card vendor, e.g.
network operator, service
provider or other vendor.
You can set the phone to show you
the confirmation messages sent
between your phone and the
network when you are using the SIM
services by selecting the option Yes
within the menu Confirm SIM
service actions, in Phone settings.
Nokia_6230_APAC_UG_en.fm Page 79 Thursday, December 16, 2004 5:16 PM
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