PDF Nokia 6310i User Guide

service of your service provider. It can contain certificates, as well as private and public keys to operate
the certificates. The certificates and keys are stored in the security module by the SIM card issuer or
service provider.
Digital signature
With the digital signature functionality you can, for example, digitally sign a bill or a financial
contract. The signature can be traced back to you via the private key and the associated certificate that
was used to perform the signature, so signing using the digital signature is the same as signing your
name to a paper bill, contract or other document.
A digital signature is initiated by a code embedded in a WAP page. See also Access codes on page 14.
Select a product you want to buy and the digital signature procedure starts and shows the text to sign.
At this point check that the header text is Read and 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 displayed text, select Sign, after you have read all of the text.
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 and press OK. Since the PIN code will
not be sent outside the phone, it will remain secret. The phone displays a confirmation Code accepted.
If you entered a wrong PIN, an error note Code error is displayed, and the phone asks you to key in the
PIN code again. After the confirmation has been displayed, the digital signature icon will disappear,
and browsing continues. The WAP service may display a confirmation of your purchase.
Certificates
There are three kinds of certificates:
Copyright © 2002 Nokia. All rights reserved.
101
Menu functions