Tri-element authentification expandable method based on tunneling technique and system thereof

The invention relates to a tri-element authentification expandable method based on tunneling technique and a system thereof. The method comprises the following steps: 1) a requester, an authentification access controller and an authentification server execute an external authentification procedure, and establish a safety tunnel between the requester and the authentification access controller; 2) the requester, the authentification access controller and the authentification server execute an internal authentification procedure, wherein, an internal TAEP package between the requester and the authentification access controller is protected by the safety tunnel established in step 1); and 3) the authentification access controller ends authentification procedures by Success group and Failure group of the TAEP package respectively. The invention provides a tri-element authentification expandable method capable of enhancing utility of TAEP of the tunnel and enhancing safety of the internal authentification procedure based on the tunneling technique and a system thereof.