So I would respectfully request that you guys take it over to the Economics subforum or somewhere else a bit more focused. There are MRO-specific topics to discuss here.

I raised similar issues last year as follows.

Transactions Withholding Attack

"Spiraling Transaction Fees Destruction" of bitcoin (Transactions fees are a Tragedy of the Commons)

I would imagine it to be aimed at something much more main-stream than a cryptocurrency. Like an email system or some other sort of messaging system would seem a much more valid proof of concept

While there is no way to share a secret code in an invisible email, there is a way to share it in an encrypted email that would destroy itself if viewed by an outsider. Using quantum encryption, you could send a message between two parties containing the deciphering key and that message, while detectable, would also be unhackable.

University of Oxford quantum physicist Artur Ekert calls quantum encryption the ultimate physical limits of privacy. Other key distribution schemes such as the Diffie Hellman scheme, rely on the difficulty of mathematical problems to work, whereas quantum encryption does not. According to Heisenberg’s uncertainty principle, objects viewed on the atomically small quantum scale change their behavior when viewed. Quantum encryption offers the possibility of a message so secure that any attempt to read it without authorization will destroy it, not because of some programmer’s whim but because of the way subatomic particles operate.

“For quantum cryptography we need ‘only’ to transit quantum particles over a certain distance, and this is relatively easy. Quantum cryptography has been demonstrated in practice and there are even companies that can sell it to you,” Ekert told Defense One.

Quantum cryptography and Bash’s pulse position modulation technique are two very different animals. Cryptography makes messages difficult to decipher and pulse position modulation cloaks them so that they can’t be detected. But Bash’s method could go hand-in-hand with something like quantum key distribution, which a message sender would use in advance to share the key code. That, in turn, would be used in the future for covert communication.

Here’s what the most secure electronic message exchange in the history of humanity would like: You would first exchange the code key in a quantum encrypted message, and then, when the receiver and the sender both had the code, they could exchange an invisible — thus perfectly secure — message. A third party might be able to detect that two parties had exchanged a single message that had been quantum encrypted, containing the key code, but that third party wouldn’t be able to see any of the exchanges that passed after that or open the key code message.