A quick response (so forgive the brevity): Let's say worst case, that a quantum computer does not currently exist, but its basic logical operation has been fle

A quick response (so forgive the brevity): Let's say worst case, that a quantum computer does not currently exist, but its basic logical operation has been fleshed out to a reasonable extent. Now, what if a practical implementation shows up in the 5-10 yr timeline. The issue is that some quantum computers could, in theory, pose a real threat to many currently used classical encryption systems. QKD + one time pad could provide, in theory if not already also in practice, a reasonable stand-in solution to counter this perceived threat.