He gave a rare glimpse into why the NSA would “fund research that could be used to create a computer that could threaten the global economy” in remarks to the Institute for Electrical and Electronics Engineers’ Military Communications Conference.

“By sponsoring research, we can better gauge what is attainable and by when, and on that basis can estimate the potential availability of a quantum computer and prepare for that eventuality,” Mr. Herrera said in remarks shared by NSA. “This way, we can be prepared for the threat posed by a quantum computer while simultaneously advancing the fundamental science that will lead to a useful quantum computer for the benefit of everyone.”