This is a technology which is virtually non-existent. What does exist exists in the form of multi-million dollar machines, cooled to near absolute zero. These only manipulate about a dozen "qubits" (it is cheaper / easier to just engage in more conventional computing for the same tasks).
While in security, we have more concrete ideas of how it might be a threat (and how to mitigate that), if it were ever to be a practical tool, in this case, it is purely aimless speculation.