163Copyright © 2004 Nokia. All rights reserved.possibly a security module which may be available on your SIM card. For moreinformation, contact your service provider.Security moduleThe security module can contain certificates as well as private and public keys. Thepurpose of the security module is to improve security services for applicationsrequiring a browser connection, and allows you to use a digital signature. Thecertificates are saved in the security module by the service provider.Press Menu and select Services, Settings, Security settings and Security modulesettings. Select• Security module details to show the security module title, its status,manufacturer and serial number.• Module PIN request to set the phone to request the module PIN when usingservices provided by the security module.• Change module PIN to change the module PIN, if allowed by the securitymodule. Enter the current module PIN code, then enter the new code twice.• Change signing PIN. Select the signing PIN that you want to change. Enter thecurrent PIN code, then enter the new code twice.See also Access codes on page 16.CertificatesThere are three kinds of certificates: server certificates, authority certificates anduser certificates.