@deftypefun {int} {gnutls_session_ticket_enable_server} (gnutls_session_t @var{session}, const gnutls_datum_t * @var{key}) @var{session}: is a @code{gnutls_session_t} type. @var{key}: key to encrypt session parameters. Request that the server should attempt session resumption using session tickets, i.e., by delegating storage to the client. @code{key} must be initialized using @code{gnutls_session_ticket_key_generate()} . To avoid leaking that key, use @code{gnutls_memset()} prior to releasing it. The default ticket expiration time can be overridden using @code{gnutls_db_set_cache_expiration()} . @strong{Returns:} On success, @code{GNUTLS_E_SUCCESS} (0) is returned, or an error code. @strong{Since:} 2.10.0 @end deftypefun