QKD Systems
Quantum computing is threatening to render public key encryption techniques insecure, with data in transit particularly vulnerable to attack. QKD (Quantum Key Distribution) provides the answer, enabling quantum-safe cryptography across fibre networks.
QKD normally requires separate dark fibres dedicated solely to carrying quantum signals. But with Toshiba's Multiplexed QKD System MU, you can easily integrate QKD on to existing data carrying fibres - and without any compromise to performance.
Deployed over an existing single fibre or a fibre pair, the MU QKD System uses O-band WDM technology to overlay quantum signals with network data, eradicating the need for an additional dark fibre. This true co-existence between QKD and data dramatically reduces the CAPEX and OPEX costs involved in delivering quantum-safe encryption.
With simple setup, auto-alignment, real-time optimisation and high key rates, Multiplexed QKD System MU ensures operators are set up to deliver QKD across their networks.
Ultimate quantum security, all on the fibre you already have.
Toshiba’s MU system reduces the CAPEX costs and complexity of deploying QKD by eliminating the need for additional dark fibre. Using WDM, MU enables QKD signals to co-exist on fibre carrying multiple 10 Gb/s or 100 Gb/s classical data channels by multiplexing the O-band QKD signal with C-band data services.
All Toshiba QKD systems use an efficient implementation of BB84, the first and most rigorously studied QKD protocol, proven secure through years of research. The BB84 protocol provides inherent protection from quantum computers and any future advances in mathematics.
At Toshiba, we've pioneered active stabilisation technology that allows our QKD systems to distribute key material continuously, in challenging operating conditions, without any user intervention. This avoids the need for recalibration of the system due to temperature-induced changes in the fibre lengths.
The reliability and stability of our QKD systems has been demonstrated in numerous deployments. In fact, at a theoretical level, the probability of key failure using our technology is < 1 x 10-10 – equivalent to less than once every 30,000 years.
The MU system offers unprecedented, metro-scale transmission distances of 80 km+ while transmitting QKD and data services on the same fibre, thanks to its exceptionally high optical loss budget (30 dB).
Our Multiplexed QKD Systems are easy to get up and running, with built-in add/drop filters for simple integration into existing fibre networks. This means all user traffic can be passed through without any additional multiplexing hardware. Once positioned in a standard 19" rack mount, the QKD hardware offers automated start-up and real-time optimisation thanks to active stabilisation technology.
A user-friendly interface, accessed through a web-browser, provides real-time and historical performance data.
Toshiba’s REST-based Key Management System provides efficient and reliable key storage and delivery. It uses ETSI industry standards, so it's compatible with leading encryptor vendors and other applications.
Toshiba QKD systems all offer high secret bit rates - even over existing deployed fibre. MU is proven to deliver 300 kb/s secure key rates at 10 dB channel loss, making it capable of supporting a diverse range of customers and applications, and providing headroom for future demands.
Discover how multiplexing can help you to easily integrate quantum-safe technologies into your existing telecoms infrastructure without dedicated fibres
Toshiba, in partnership with BT, have successfully implemented the UK’s first industrial deployment of a quantum-secure network
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