About Toshiba Quantum Technology
Preparing for a quantum future
We’re at the cutting-edge of innovation in quantum technology. Since 1999, we’ve achieved a series of world firsts in QKD development and deployment, harnessing quantum physics to future-proof network communications infrastructures.
Toshiba’s Quantum Technology division provides the Toshiba Quantum-Safe Networking (QSN) Platform, bringing together interoperable quantum-safe technologies and capabilities that can be easily integrated into and scale with existing communications networks. Built on more than two decades of quantum innovation, QSN helps organizations protect critical data, maintain trust and navigate one of the largest cryptographic transitions in history.
Securing the quantum age
At Toshiba, we’re committed to helping organizations navigate the transition to quantum-safe networking. As part of this commitment, we have developed the Toshiba Quantum-Safe Networking (QSN) Platform, bringing together quantum-safe technologies and capabilities within a unified platform that can be easily integrated into existing communications networks.
Designed to support the protection of critical communications and sensitive data, QSN enables organisations to begin where protection is needed most and scale as requirements evolve. By combining technologies such as Quantum Key Distribution (QKD) and Post-Quantum Cryptography (PQC), the platform provides a future-proof, resilient and crypto-agile approach to security that can adapt as technologies, standards and threats continue to change.
What is QSN?
A scalable foundation for the quantum-safe transition. Toshiba Quantum-Safe Networking (QSN) helps organizations protect critical data and communications against both current and future threats. The platform enables scalable quantum-safe protection within a unified architecture, enabling organizations to begin where protection is needed most and expand as requirements evolve.
At the cutting edge of quantum communications since 1999
Backed by world-leading experts, Toshiba has delivered a series of world firsts in quantum communications research, development and deployment. Our team continues to advance the science that underpins quantum-safe networking, helping shape industry standards and enabling the development of next-generation quantum communications technologies.
Through more than two decades of innovation, collaboration and real-world deployment experience, Toshiba has established itself as one of the leading pioneers in quantum-safe communications, delivering technologies that are proven in operational networks around the world.
Latest research
- A semiconductor quantum dot interface for entangled multiphoton generation in the telecom C-band
- Electrically Tunable and Purcell Enhanced Telecom Single-Photon Emission from Quantum Dots in Circular Photonic Crystal Resonators
- Phase Randomization of DFB Laser Pulses Beyond the Diffusion Limit
- Seamless Satellite–Fibre Quantum Networking with a Compact Space-Deployable QKD Payload
- Feasibility of multi-gigahertz satellite-to-ground secure quantum communication
- Compact GHz-Gated InGaAs/InP SPAD Arrays for Quantum Key Distribution
Our people
Dr Andrew Shields, Head of Toshiba Quantum Technology Division
With a doctorate from Imperial College London and over 500 papers and patents in the field of quantum devices and systems, Dr Andrew Shields is a Fellow of the Royal Academy of Engineering, has been awarded IoP Silver and Gold medals, and is recognised as a world-leading expert in the field of quantum communications.
Lee Johnson, Business Development Manager
An IT, communications and technology sales specialist, Lee Johnson specialises in business solutions for the enterprise, service provider and public sectors. He has experience sourcing a wide range of telecoms and quantum technology solutions, including significant networks across EMEA.
Luma Musa, Key Account Manager
Luma Musa is a sales and marketing professional in telecommunications, wireless and technology markets. Her experience in engineering and product design means she is especially well-placed to consult with customers on new technology and products.
Andy Grant, Head of Support Services
As Head of Support Services, Andy Grant is responsible for securely establishing, maintaining, and troubleshooting the deployment of QSN platforms. He works with customers to ensure their ultra-secure networks operate at optimum efficiency.
Our heritage
Quantum beginnings
In 1999, we began research into quantum cryptography at the Cambridge Research Laboratory of Toshiba Research Europe Limited. In 2003, we were the first to announce Quantum Key Distribution (QKD) over 100 km of fibre. By 2008, we had collaborated in the first QKD network in Europe as a core partner of the EU-funded SECOQC project in Vienna.
Since then, we have continued to advance quantum communications technologies, increasing the range and secure key rates of our systems, enabling coexistence on existing fibre infrastructure and supporting increasingly complex network architectures. These innovations have helped shape the technologies and expertise that underpin today’s Toshiba Quantum-Safe Networking (QSN) Platform and our broader vision for the transition to quantum-safe networking.

Toshiba QSN today
Today, Toshiba Quantum-Safe Networking (QSN) brings together more than two decades of quantum communications innovation within a unified platform for quantum-safe networking. The platform includes the QSN Transceiver, QSN Hub, QSN Spoke, QSN Link, QSN Multiplexer, QSN Key Delivery System (KDS), Q-KMS, QSN Controller, and enables organizations to support a wide range of network architectures, deployment models and security requirements as they navigate the transition to quantum-safe networking.

Quantum cryptography in action
Our Toshiba quantum systems have been demonstrated and deployed successfully around the world.
Working with JP Morgan Chase in Columbus (Ohio), we demonstrated that QKD can be used to secure blockchain communications. In Graz (Austria), we demonstrated protection of medical data in transit and rest in a trial with Austria Institute of Technology as part of the OpenQKD project.
In 2021 SpeQtral and Toshiba collaborated to power quantum-secure communication solutions in Southeast Asia. Read the full article.
In partnership with BT in 2021, we successfully implemented quantum security of smart manufacturing data shared between the National Composite Centre and the Centre for Modelling and Simulation. The deployment allows industrial organizations to securely transmit corporate IPR and other sensitive information between the facilities, instead of having to rely on transportation via physical portable storage devices.
We launched London’s first Secure Metro Network with BT in 2022. This award-winning quantum trial connected sites in London’s Docklands, the City and the M4 Corridor for end-user EY. A complex network with multiple endpoints, it’s paved the way for commercial QKD services in the UK and beyond.
Watch the full video exploring London’s quantum-secured Metro Network:
In June 2024 we announced a strategic collaboration between Toshiba and Numana to strengthen the capabilities of the Kirq Quantum Communication Testbed in Quebec.
In June 2025 we announced our partnership with Orange Business to launch the first commercial quantum safe network in Paris, France. Watch the full video and review the press release here.
In June 2026 we announced that Toshiba Corporation, NTT DOCOMO Business Inc and NEC corporation have began construction of Japan’s first wide-area quantum cryptography communication network covering approximately 600 km in Tokyo, Nagoya, and Osaka.
What's next?

There’s ongoing debate about exactly when sufficiently capable quantum computers will become available. However, the transition to quantum-safe networking has already begun, and organisations must prepare today to protect critical communications and sensitive data for the future.
As quantum technologies continue to evolve, Toshiba remains committed to advancing the technologies that underpin quantum-safe networking. From continued research into Quantum Key Distribution (QKD), integrated photonics and satellite communications through to the ongoing development of the Toshiba Quantum-Safe Networking (QSN) Platform, our focus remains on helping organizations navigate the transition to quantum-safe networking with confidence.
Built on more than two decades of innovation and real-world deployment experience, Toshiba continues to invest in the technologies, expertise and partnerships needed to support the long-term protection of critical communications, sensitive data and digital infrastructure in the quantum era.
And, inspired by quantum technology, we’ve also launched a Simulated Bifurcation Machine (SQBM+) solution – an innovative quantum-inspired algorithm and corresponding computer solution for solving complex problems and making optimal decisions in short time spans.
At Toshiba, we put innovation first. Our extensive historical and ongoing R&D activities ensure we are ready to deliver quantum-secure solutions suitable for a global, mass market. And our provably secure quantum solutions can protect communications networks today, tomorrow and into the future, regardless of advancements
in quantum computing.