Nokia N73 Manual Del Usuario página 105

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
Certificate not valid yet
certificate should be valid, check that the current
date and time in your device are correct.
Before changing any certificate settings, you must make
sure that you really trust the owner of the certificate and
that the certificate really belongs to the listed owner.
View certificate details—check authenticity
You can only be sure of the correct identity of a server when
the signature and the period of validity of a server certificate
have been checked.
You are notified if the identity of the server is not authentic
or if you do not have the correct security certificate in
your device.
To check certificate details, scroll to a certificate, and select
Options > Certificate
details, the validity of the certificate is checked, and one of
the following notes may be displayed:
104
Expired certificate
is shown even if the
details. When you open certificate
• Certificate not trusted—You have not set any application
to use the certificate. See "Change the trust settings,"
p. 104.
• Expired certificate—The period of validity has ended
for the selected certificate.
• Certificate not valid
not yet begun for the selected certificate.
or
• Certificate corrupted—The certificate cannot be used.
Contact the certificate issuer.
Change the trust settings
Before changing any certificate settings, you must make
sure that you really trust the owner of the certificate and
that the certificate really belongs to the listed owner.
Scroll to an authority certificate, and select
settings. Depending on the certificate, a list of the applications
that can use the selected certificate is shown. For example:
• Symbian installation: Yes—The certificate is able
to certify the origin of a new Symbian operating
system application.
• Internet: Yes—The certificate is able to certify servers.
• App. installation: Yes—The certificate is able to certify
the origin of a new Java
Select Options > Edit trust setting
yet—The period of validity has
Options > Trust
TM application.
to change the value.