Quantum key distribution (QKD) has always faced a stubborn limitation: to reach its theoretical promise, a system needs to use stable single-photon sources that produce exactly one photon on demand. Those sources are difficult to build and pricey to operate. In practice, most networks use faint laser pulses, which are good enough to demonstrate QKD, [...] The post Researchers Advance Quantum Encryption, Without Perfect Hardware appeared first on Techstrong IT.
