This illustration shows the display for a particular signer (certificate authority) with the data as to who the certificate belongs to, who issued it, its serial number, validity period, and thumbprint.

There are four checkboxes, of which the first three must be checked to make this signer a trusted authority:

• Accept this Certificate Authority for Certifying network sites
• Accept this Certificate Authority for Certifying e-mail users
• Accept this Certificate Authority for Certifying software developers

and

• Warn before sending data to sites certified by this authority