Nokia 7380 User Manual page 54

M e n u f u n c t i o n s
Change module PIN—to change the module PIN, if allowed by the security
module
Change signing PIN—to change the signing PIN
See also "Access codes," p. 7.
Certificates
There are three kinds of certificates: server certificates, authority certificates, and
user certificates.
• The phone uses a server certificate to create a connection with improved
security to the content server. The phone receives the server certificate from
the service provider before the connection is established and its validity is
checked using the authority certificates saved in the phone. Server
certificates are not saved.
The security indicator
transmission between the phone and the content server is encrypted.
The security icon does not indicate that the data transmission between the
gateway and the content server (or place where the requested resource is
stored) is secure. The service provider secures the data transmission between
the gateway and the content server.
• Authority certificates are used by some services, such as banking services, for
checking the validity of other certificates. Authority certificates can either 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.
• User certificates are issued to users by a certifying authority. User certificates
are required to create a digital signature, and they associate the user with a
specific private key in a security module.
Important: 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.
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is displayed during a connection if the data