"single points of failure" . . "single component whose failure" . "single (central) point-of-failure" . "Single point of failure" . "single point failure" . . "single event or component failure" . "Single Point of Failure" . "central point of failure" . "the single pivoting retraction point" . . . "point" . . "failure point" . . "viability of the attack" . "Single point of failure" . . "SPOF" . "single point of failure" . . . "single reasonably foreseeable incident" . "single" .