\gnutls{} will disable ciphersuites that are not compatible with the key, or
the enabled authentication methods.
For example keys marked as sign-only, will not be able to
-access the plain RSA ciphersuites, but only the DHE\_RSA ones.
+access the plain RSA ciphersuites, but only the DHE\_RSA ones. It is
+recommended not to use RSA keys for both signing and encryption. If possible
+use the same key for the DHE\_RSA and RSA\_EXPORT ciphersuites, which use signing,
+and a different key for the plain RSA ciphersuites, which uses encryption.
\addvspace{1.5cm}