Ifunga ryubwenge nibikoresho byumutekano byizewe, ariko gusa niba ubikoresha neza.Muri ubwo buryo, gufunga metero eshatu uhereye kurufunguzo rwihishe munsi yumuryango ntabwo rufite umutekano muke, gufunga ubwenge hamwe na PIN 1-2-3-4 ntibizaba bifite umutekano cyane.Ifunga ryubwenge rirashobora no kuba umutekano kuruta gufunga bisanzwe, kubera ko urufunguzo rworoshye gutakaza kuruta, vuga, intoki zawe, niba ukoresha gufunga urutoki.