  The highly specialist terms `quantum computing' and `quantum information',
together with the broader term `quantum technologies', now appear regularly in
the mainstream media. While this is undoubtedly highly exciting for physicists
and investors alike, a key question for society concerns such systems'
vulnerabilities -- and in particular, their vulnerability to collective
manipulation. Here we present and discuss a new form of vulnerability in such
systems, that we have identified based on detailed many-body quantum mechanical
calculations. The impact of this new vulnerability is that groups of
adversaries can maximally disrupt these systems' global quantum state which
will then jeopardize their quantum functionality. It will be almost impossible
to detect these attacks since they do not change the Hamiltonian and the purity
remains the same; they do not entail any real-time communication between the
attackers; and they can last less than a second. We also argue that there can
be an implicit amplification of such attacks because of the statistical
character of modern non-state actor groups. A countermeasure could be to embed
future quantum technologies within redundant classical networks. We purposely
structure the discussion in this chapter so that the first sections are
self-contained and can be read by non-specialists.
