User's Manual

158 Control panel
Security information
Security information is displayed when Certificate manager
cannot be sure of the origin of the page or software. For
example, security information will be displayed if:
• The certificate on a page has expired.
• The identity of a software manufacturer cannot be verified.
Security information is also displayed when a certificate on your
P900 has:
• Expired.
• Been revoked by the independent organization that issued it.
Adding and deleting certificates
Your P900 handles certificates automatically so, most of the
time, you can browse the Internet securely without using
Certificate manager . If you do need to add or delete a certificate,
you will usually be informed by your network operator or
system administrator. You should delete a certificate from
Certificate manager if you are informed, or suspect, that:
• The certificate does not belong to the person who supplied it.
• The certificate was issued incorrectly by the independent
organization that created it.
Type of certificate
The type can be either User or Certificate Authority .
•
User certificates contain your identity. This type of certificate
is used when the server asks for client authentication. The
client application requests you to identify yourself by
choosing a user certificate.
•
Certificate Authority certificates contain server details. This
type of certificate is handled by your P900 when the server
only requires server authentication. This means that your
identity remains anonymous.
Flip removed
This dialog lets you enable the use of the Virtual flip when the
flip of your P900 has been removed, see ‘Virtual flip’ on
page 17.
Format disk
This dialog primarily lets you rename and format any Memory
Stick Duo that you install in your P900. Your P900 comes with
one Memory Stick Duo.