NIST researchers have developed a new quantum key distribution (QKD) system capable of generating secure encryption keys at 2.5 GHz speeds using 1310 nm wavelengths. The system, which outperforms previous silicon-based schemes, can produce sifted key rates of up to 10 kbit/s over 50 km of optical fiber.
The key technical advancements include:
– High timing resolution (<100 ps) superconducting nanowire single-photon detectors
- Field-programmable gate array-based data-handling electronics
- Subnanosecond time tagging at GHz rates
- 100 ps detection time bins at GHz count rates
These developments could significantly enhance the practicality and scalability of quantum cryptography systems, enabling secure communication at much higher speeds and over longer distances than previously possible.
Source: https://www.nist.gov/ctl/smart-connected-systems-division/nist-quantum-cryptography
Keywords: QKD, Quantum, Communication, Key, Single-photon
