As opposed to the United States where carriers are currently focusing on deploying next-generation 5G cellular networks, those in South Korea have already started to make quantum cryptography available to consumers. For instance, SK Telecom offers the Galaxy A Quantum, a 5G-enabled smartphone that also features a quantum random number generator (QRNG) chip for sale in South Korea.
The QRNG chip generates a random quantum number through an image sensor that catches a ray of light generated by an LED that is also housed inside the chip. The sensor determines the number of photons that are present in the LED ray and then proceeds to generate a unique quantum number based on this information.
Research insights providers Reportlinker.com expects the global quantum cryptography sector to reach $3.7 billion by the end of 2027. China is expected to contribute significantly to this value, by growing at 31.4% over the course of the next couple of years, with the United States expected to grow at a rate of 36.5%.
https://wccftech.com/toshiba-3-billion-revenue-target-quantum/