That way a satellite would be preloaded with hundreds of "hidden" secret keys and one of them would be available for encrypting only when it would be decided on the ground. A quantum twist to Merkle's puzzles.
I am not convinced by this kind of quantum cryptography. I am sure it would be possible to crack it, because all cryptography proposals are overly complexifying a little aspect of a much larger problem, and someone just look at another aspect of the problem and easily defeats the proposed cryptography scheme.
It is a pattern that we seen an incredible number of times, when do people will recognise it and adopt a more humble, honest and safer way to implement security?
Indeed I am yet another random guy on Internet, I am not versed in quantum cryptography, and I did not work on cryptography since a long time. But on the anecdoctical side, 12 years ago I had to work on identity/security and at that time when I told my colleagues that public cryptography was no more safe, they were baffled. For them it was pure non-sens, yet I could crack (factor in prime numbers) simple keys on my little laptop and RSA stopped a few years later their famous RSA challenge [0]...