Digital Signature - Nokia RM30 User Manual

M e n u f u n c t i o n s
• User certificates are issued to users by a Certifying Authority. User
certificates are required, for example, to create a digital signature
and they associate the user with a specific private key in a security
module.
Important: Note that even if the use of certificates makes the risks
involved in remote connections and software installation considerably
smaller, they must be used correctly in order to benefit from increased
security. The existence of a certificate does not offer any protection by
itself; the certificate manager must contain correct, authentic, or
trusted certificates for increased security to be available. Certificates
have a restricted lifetime. If Expired certificate or Certificate not valid
yet is shown even if the certificate should be valid, check that the
current date and time in your device are correct.
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.

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
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 select Sign.
The text may not fit within a single screen. 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 10) and press OK. The digital signature
100
Read and that the digital signature icon