First successful delivery of quantum tokens using commercial QKD hardware, demonstrating fast transaction verification at the point of exchange - a crucial step toward quantum-enhanced financial security and a major advance for QKD.
Quantum tokens are designed to provide unforgeability, privacy, and fast settlement, in a single financial instrument. No previous technology can deliver these three combined benefits.
In the world's first implementation using off-the-shelf hardware, quantum tokens were transmitted across 10km of fibre in Tokyo, using commercial quantum key distribution (QKD) devices provided by NEC*.
This is a pivotal step towards the deployment of ultra-high-security quantum tokens in use cases such as tokenized asset security and high-speed trading.

TOKYO and BROOMFIELD, Colo., Nov. 18, 2024 /PRNewswire/ -- In a long anticipated trial, Quantinuum ("Quantinuum", Head Office: Broomfield, Colorado, U.S.A., CEO: Rajeeb Hazra), together with Mitsui & Co., Ltd. ("Mitsui", Head Office: Tokyo, President and CEO: Kenichi Hori) and NEC ("NEC", Head Office: Tokyo, President and CEO: Takayuki Morita) today announced the successful delivery of quantum tokens across a 10km fibre-optic network in Japan. This is the first time such a delivery has been accomplished.

Quantum tokens are a new financial instrument that take advantage of the properties of quantum physics to meet the robust demands of asset trading without the communication overheads required by traditional financial systems. Quantum tokens are transmitted across fibre-optic quantum key distribution (QKD) networks, which are rapidly expanding around the globe. Today's announcement with Mitsui demonstrates growing industry recognition of quantum tokens' potential in financial services.

Ilyas Khan, Founder and Chief Product Officer at Quantinuum, said: "The original motivation for quantum communications was the exchange of money, as envisaged by Stephen Wiesner. Today, we have demonstrated real-world security enhancements for financial systems using off-the-shelf quantum communications hardware. This opens the door to a new era in quantum-enhanced security with wide applicability, providing commercial organisations with something concrete to utilise."

Koji Naniwada, Deputy General Manager, Quantum Innovation Dept. at Mitsui, said: "Quantum tokens will increase the security of digital assets, while improving transaction performance and maintaining privacy. These topics are critical for our customers and partners in the financial sector and this demonstration is a valuable outcome of our partnership with Quantinuum."

Naoki Ishida, Director with the Trading and Service Solution Department at NEC, said: "We are the first to provide a platform for realizing a quantum token system using NEC's quantum key distribution (QKD) devices. Based on the results of this trial between Mitsui & Co. and Quantinuum, we will continue to work towards the social implementation of quantum cryptography technology."

Quantum tokens are designed to use quantum physics to prevent forgery, while ensuring transactions can be settled near-instantly, whereas traditional payments systems rely on double-entry bookkeeping to prevent double-spending of funds. This adds time, overhead and risk to every transaction, as digital systems are consulted to confirm funds are available and to settle transactions.

Quantum tokens instead rely on the no-cloning theorem of quantum physics to prevent forgeries and double-spending. Only the intended recipient will receive the correct token data, which can only be spent at one location in the future. This enables near-instant transaction settlement by removing the need to check multiple systems or wait for network confirmations.

As demonstrated in Quantinuum's recent work with HSBC, securing digital assets in the quantum-age is growing in urgency. The financial sector is increasingly looking to quantum technology to solve these complex problems with the power of nature.

Note:

(*) The equipment provided by NEC was partially supported by results from Japan's Ministry of Internal Affairs and Communications' (MIC)  "Research and development for construction of a global quantum cryptography network"(JPJ008957) under "R&D of ICT Priority Technology Project" (JPMI00316) and Japan's Cabinet Office's "Photonics and Quantum Technology for Society 5.0" project under the Cross-ministerial Strategic Innovation Promotion Program (SIP).

Mitsui & Co. is a global trading and investment company with a presence in more than 60 countries and a diverse business portfolio covering a wide range of industries.

The company identifies, develops, and grows its businesses in partnership with a global network of trusted partners including world leading companies, combining its geographic and cross-industry strengths to create long-term sustainable value for its stakeholders.

Mitsui has set three key strategic initiatives for its current Medium-term Management Plan: supporting industries to grow and evolve with stable supplies of resources and materials, and providing infrastructure; promoting a global transition to low-carbon and renewable energy; and empowering people to lead healthy lives through the delivery of quality healthcare and access to good nutrition.

Visit https://www.mitsui.com/jp/en/index.html for more information.

Quantinuum, the world's largest integrated quantum company, pioneers powerful quantum computers and advanced software solutions. Quantinuum's technology drives breakthroughs in materials discovery, cybersecurity, and next-gen quantum AI. With over 500 employees, including 370+ scientists and engineers, Quantinuum leads the quantum computing revolution across continents.  http://www.quantinuum.com/

NEC Corporation has established itself as a leader in the integration of IT and network technologies while promoting the brand statement of "Orchestrating a brighter world." NEC enables businesses and communities to adapt to rapid changes taking place in both society and the market as it provides for the social values of safety, security, fairness and efficiency to promote a more sustainable world where everyone has the chance to reach their full potential. For more information, visit NEC at http://www.nec.com. 

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