Quantum key distribution (QKD) is the mostly-unused, super-secure protocol that even defeats the big nosy ears of the NSA. But QKD is quite difficult to get right. And, just like with classical ...

Measurement-device- independent QKD protocols can successfully close all the loopholes at detectors by introducing an untrusted intermediate node for interference measurement.

MicroCloud proposes a high-dimensional quantum key distribution protocol enhancing secure quantum transmission using quantum Fourier transform. How does the new QKD protocol improve security?

By harnessing quantum dots and inventive protocols, researchers have cracked a decades-old challenge in quantum encryption, showing secure communication can work without perfect hardware.

In previous work, the researchers developed a three-state time-bin QKD protocol that was carried out with standard fiber-based components to achieve QKD transmission at record high speeds.

By pairing QKD nodes in space with transmitters and receivers on Earth, it will be possible to send quantum-encrypted communication around the world without needing fiber-optic cables.

BT trialed QKD on a six-kilometer-long cable – still far off other experiments with the protocol in which researchers have managed to deliver quantum particles over hundreds of kilometers.

The predicted processing power of quantum computers is likely to make existing encryption algorithms obsolete. Quantum key distribution (QKD) has been posited as a possible solution. Computer ...