>> What do they mean by unhackable?
I have a superficial understanding, but the basic idea involves the destructive nature of simply observing — this is the “quantum” factor. So for secure communications, transmit the data in parallel quantum channels, and if the received data doesn’t match, it’s been observed. To skirt observing, transmit tiny chunks at light speed in a randomized manor. I’m guessing...
If an app is a worm or virus from the get-go, and it is sent down this “unhackable” fiber, then it will be guaranteed to work it’s tragic magic when it gets to its destination.