How to manage Certificates

From the user's point of view, there are three types of use cases which require a specific care with handling certificates.
These are the use cases where users have to

1. handle an own user certificate and the corresponding private key
2. handle (and trust) user an server certificates from third parties (e.g. a server certificate from a banking server or another user certificate for authentication purposes)
3. handle (and trust) certificates from Certificate Authorities (CAs)

General and browser-specific information are provided by the DFN:

FAQ DFN-PKI general information about the DFN Public Key Infrastructure and certificate handling

DFN FAQ Mozilla/Firefox information about how to handle certificates with the Mozilla or Firefox browser

DFN FAQ MS Internet Explorer how to handle certificates with the Internet Explorer