Alim,
- The Certificate SF Root Node is a Public Certificate / Public Key
- The Client Authentication requires a Private Key and hence only Private Key's are displayed.
- If you look at the Certificates displayed in F4 help all of those are private key's including the one in the view WebserviceSecurity - System-key.
- To do Client Authentication in the SF Adapter make sure you have the right Private Key loaded into your Keystore.
Regards
Bhavesh