144Copyright © 2003 Nokia. All rights reserved.Emptying the cache memoryTo empty the cache memory:• When no connection is in progress: Press Menu in standby mode, and selectServices and Clear the cache.• When a connection is in progress: Press Options and select Other options andClear the cache.Security features for browser connectionsSecurity features may be required for some services, such as banking services. Forsuch connections you need security certificates. For more information, contactyour service provider.CertificatesThere are two kinds of certificates: server certificates and authority certificates.• Server certificatesThe phone uses a server certificate to create a connection with improvedsecurity to the service provider. The phone receives the server certificate fromthe service provider before the connection is established and its validity ischecked using the authority certificates saved in the phone. Server certificatesare not saved. The phone indicates if the identity of the Internet server cannotbe verified, if the Internet server certificate is not authentic or if you do nothave the correct authority certificate in your phone.The security indicator is displayed during a connection, if the datatransmission between the phone and the Internet server is encrypted.
