The quantum-key-distribution (QKD) system by ThinkQuantum QuKy was functionally tested at the JRC. It is based on a polarisation-encoded three-state BB84 protocol with decoy states, a protocol proven to be secure but for distances shorter than for the standard four-state BB84.
The tested QKD system (QuKy) proved robust, reliable and easy to install and operate. Measurements performed over a dark-fibre link with incremental attenuation up to 28 dB demonstrated the secret-key rate up to 12 kbit/s and quantum-bit-error-rate (QBER) below 2 %. A proof-of-concept video transmission encrypted with the generated keys ran continuously for several hours without interruption.
These results confirm that the QuKy platform can provide secure key material under realistic loss and polarisation-drift conditions.
CERUTTI Isabella;
GENTILINI Mattia;
LEWIS Adam;
TRAVAGNIN Martino;
2026-04-28
Publications Office of the European Union
JRC146156
978-92-68-38835-8 (online),
1831-9424 (online),
EUR 40671,
OP KJ-01-26-139-EN-N (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC146156,
10.2760/4833349 (online),
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