Nokia 7250i

Page 136
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2003 Nokia. All rights reserved.
136
Important: Note, however, 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.
Important: 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 phone are correct.
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. 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.
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