Quantum computing has teased us with its potential for some time, but we won't be seeing qubits in our laptops anytime soon. However, science has also sought to leverage quantum physics in cryptography, and a recent breakthrough will allow for quantum encryption over fiber optic cables already in use. Researchers from Toshiba and Cambridge University discovered that they could transmit and receive encryption keys using pulses of quantum light and a specialized photodetector. The trick was to build a detector with a gate capable of both sensing a single photon and openin
