According to Scientific American -- Quantum cryptography has marched from theory to laboratory to real products
Cryptography depends on "factorization" or other algorithmic mathematical formulas. "It is easy to compute the product of two large numbers but extremely hard to factor it back into the primes."
"...the advent of the quantum information era -- and, in particular, the capability of quantum computers to rapidly perform monstrously challenging factorizations -- may portend the eventual demise of RSA and other cryptographic schemes. 'If quantum computers become a reality, the whole game changes,' says John Rarity, University of Bristol in England."
Government and companies needing high security tranmissions can now buy quantum-cryptographic possibilities from two companies...as yet undisclosed.
Whether or not we can be in two places at the same time, maybe our message can...coded and carried with integrity, safe from prying eyes.