As I understand it
The key exchange would be using a particular property of a quantangled photon link which ensures that any attempt to monitor the exchange would be detected; hence this is suitable for secure exchange of keys, if a bit slow compared to other communication methods and quite expensive.
From what I've read, the instant and 'spooky' communication at a distance can't be used for the instant transmission of data at a distance, for various practical and physical reasons.
I'm just a dog-basket physicist; a proper armchair physicist will be along in a minute.
Biting the hand that feeds IT
