Door system , comprising: (i) a securing mechanism for securing a vehicle door , wherein the securing mechanism comprises: a locking system which comprises a locking element and which is configured, in a locking position of the locking element , to lock the vehicle door in a closed position and, in an unlocking position of the locking element, to unlock the vehicle door ; a securing element which is configured, in a securing position, to block a movement of the locking element from the locking position into the unlocking position in a first direction and, in a release position, to release the movement of the locking element from the locking position into the unlocking position in the first direction; and an actuator which is configured to move the securing element from the release position into the securing position and/or from the securing position into the release position, wherein the securing element is further configured, in the securing position, to release a movement of the locking element in a second direction; (ii) a vehicle door ; and (iii) a door frame , characterized in that the locking system is arranged on the door , and in that the actuator and the securing element are arranged on the door frame . (i) a securing mechanism for securing a vehicle door , wherein the securing mechanism comprises: a locking system which comprises a locking element and which is configured, in a locking position of the locking element , to lock the vehicle door in a closed position and, in an unlocking position of the locking element, to unlock the vehicle door ; a securing element which is configured, in a securing position, to block a movement of the locking element from the locking position into the unlocking position in a first direction and, in a release position, to release the movement of the locking element from the locking position into the unlocking position in the first direction; and an actuator which is configured to move the securing element from the release position into the securing position and/or from the securing position into the release position, wherein the securing element is further configured, in the securing position, to release a movement of the locking element in a second direction; a locking system which comprises a locking element and which is configured, in a locking position of the locking element , to lock the vehicle door in a closed position and, in an unlocking position of the locking element, to unlock the vehicle door ; a securing element which is configured, in a securing position, to block a movement of the locking element from the locking position into the unlocking position in a first direction and, in a release position, to release the movement of the locking element from the locking position into the unlocking position in the first direction; and an actuator which is configured to move the securing element from the release position into the securing position and/or from the securing position into the release position, wherein the securing element is further configured, in the securing position, to release a movement of the locking element in a second direction; (ii) a vehicle door ; and (iii) a door frame , <EOS>