An intraluminal device may be used at a bifurcation to anchor in an afferent vessel, allow perfusion to efferent vessels, and act as scaffolding to inhibit herniation of objects out of a neck of a bifurcation aneurysm. A diverter is disposed within the central portion, and has a lower portion and an upper portion. This information-bearing noise can be combined with a non-random decoy signal.