Nokia 6230 User Manual page 166

6230.ENv1a_9310059.book Page 154 Monday, March 22, 2004 11:54 AM
Certificates
There are three kinds of certificates—server, authority, and user.
Certificates have a restricted lifetime. If Expired certificate or Certificate not valid
yet is shown even though the certificate should be valid, check that the current
date and time settings in your phone are correct. Before changing these settings,
make sure that you really trust the owner of the certificate and that the certificate
really belongs to the listed owner.
SERVER CERTIFICATES
The phone uses a server certificate to create a connection with improved security
between the phone and the content server. The phone receives the server
certificate from the service provider before the connection is established. The
validity of the server certificate is checked using the authority certificates saved in
the phone. Server certificates are not saved.
AUTHORITY CERTIFICATES
Authority certificates are used by some services, such as banking, for checking the
validity of other certificates. Authority certificates can be saved in the security
module by the service provider, or they can be downloaded from the network if the
service supports the use of authority certificates.
To view authority certificates, select Services > Settings > Security settings >
Authority certificates > Certificate list, scroll to the desired certificate, and
select View.
USER CERTIFICATES
User certificates are issued to users by a certifying authority. User certificates are
required to make a digital signature. They associate the user with a specific private
key in a security module.
To view user certificates, select Services > Settings > Security settings > User
certificates > Certificate list, scroll to the desired certificate, and select View.
Cookies
A cookie is data that a Web site saves in your phone browser cache memory. The
data can be, for example, your user information or your browsing preferences.
Cookies will be saved until you clear the cache memory.
1 From the menus, select Services > Settings > Security settings > Cookies.
OR
While browsing, select Options > Other options > Security > Cookies.
2 Select Allow to accept cookies or Reject to reject cookies.
154 Copyright © 2004 Nokia