@deftypefun {gnutls_sec_param_t} {gnutls_x509_privkey_sec_param} (gnutls_x509_privkey_t @var{key}) @var{key}: a key This function will return the security parameter appropriate with this private key. @strong{Returns:} On success, a valid security parameter is returned otherwise @code{GNUTLS_SEC_PARAM_UNKNOWN} is returned. @strong{Since:} 2.12.0 @end deftypefun