The basic assumption is that the bank sends a few photons to the clients terminal device which produces a quantum-secure token - a cryptogram which subsequently functions as a one-time credit card. cryptogram with the bank which completes the payment. So far it sounds more like science fiction especially quantum communication up to the phone but it will happen.SandboxAQ and Vodafone conducted a proof-of-concept test of a VPN with quantum-resistant encryption.
Common smartphones were used with software modifications Indonesia WhatsApp Number Data that subsequently supported quantum-resistant encryption PQC and will be standardized at NIST.HSBC Bank in London will begin testing quantum key distribution QKD with the help of UK operator BT Amazon and Toshiba. This test link will connect the head office in central London with the banks central data center which is 2 km away taking their communication to a new level.Quantum technologyThese are still quantum computers and networks.
There is not much to say about the sensors yet they are the closest to deployment. Here is a nice article that provides a readable introduction to the subject of quantum sensors.Researchers from the American NIST presented their latest creation a superconducting camera capable of detecting individual photons with a resolution of . megapixels that is pixels - detectors. It is times larger than the previous largest device.