Nokia 7280 - Cell Phone - GSM, Руководство пользователя

Страница: 116 / 132

116 Copyright
©
2004 Nokia. All rights reserved
.
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 that 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 .
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 that you want to use. Enter the signing PIN (see General
information on page 12 ) and press OK . The digital signature icon will disappear,
and the service may display a confirmation of your purchase.