However, without proper safeguards, this widespread interconnectivity poses enormous risks to our computer systems and, more importantly, to the critical operations and infrastructures they support.
The proper safeguards are expensive to obtain. 
mnli hypothesis: The proper safeguards are expensive to obtain.  premise: However, without proper safeguards, this widespread interconnectivity poses enormous risks to our computer systems and, more importantly, to the critical operations and infrastructures they support.