Use of quantum cryptography in commercial application

Quantum cryptography is unconditional secure communication by using the phenomena of Heisenberg’s uncertainty principle, no-cloning theorem of photon of quantum mechanics. Further, conventional cryptography susceptible at present computer computation but processing speed grow more rapidly and quantum computer abruptly launch then classical cryptography not so useful, it is easily breakable with the help of quantum computers. If it is implemented, then Quantum cryptography use in every sphere like ultra secure voting, secure communication  with space, a smarter power grid, quantum internet etc. This paper aims to introduce different commercial application of quantum cryptography if it is implemented.