The ability to send quantum information securely, known as quantum key distribution, is one of the most practical (if difficult) applications of quantum science. A new study demonstrates the ...

Scientists have taken a major step toward ultra-secure quantum communication by demonstrating a remarkably stable quantum encryption system that worked across more than 120 kilometers of optical fiber ...

Andrew Jenkins has worked as an information analyst for an intelligence agency in Washington, D.C., for over 14 years. He is the author of the 2022 book, The Devil Made Crypto. Follow him on LinkedIn.

The experimental layout of the sender Alice and the receiver Bob. Alice’s setup contains the excitation and collection setup of the single photon source, and a Sagnac-like polarization modulator for ...

But a newer category is beginning to mature from theoretical research into deployable infrastructure.​ Unlike QKD, which ...

Quantum communication could enable uncrackable transfer of information, but most approaches rely on trusted devices. Researchers have now demonstrated that a new method that does away with this ...

Researchers in China have distributed device-independent quantum cryptographic keys over city-scale distances for the first time – a significant improvement compared to the previous record of a few ...

Robust quantum links across long distances A second challenge was maintaining signal quality over long distances. One key issue is dispersion—a physical effect that stretches out light pulses in time, ...