Notorious
QKD systems have been shown to be notoriously subject to subtle attack. They are theoretically secure, but when implemented in reality all sorts of attack vectors appear. Needless to say, one presumes that the keys are also enciphered using conventional means (i.e., superenciphered over QKD).
And for the last ditch perfect encipherment, keep that TB of OTP handy. Arguably, one could just use OTP superencipherment with QKD and befuddle NSA/FSB/BND/DGSE/MSS/... QKD bandwidth is so low that it would take quite a wile (indeed!) before anyone was the wiser.
