#Japan #Tokyo #Toshiba #QNS Services #QKD System

Successful Proof of Concept for Quantum Safe Communication

QNS Services, a dedicated provider of quantum-resistant communication solutions, has achieved a significant milestone in collaboration with Toshiba. Their recent proof of concept (PoC) demonstrates a quantum safe communication environment that effectively combines information-theoretical security and high availability, addressing the crucial needs of modern enterprises.

The PoC Framework

The PoC was constructed around a dual-site configuration, assuming the connectivity between vital hubs in a corporate network. At the core of the primary line is Toshiba's Quantum Key Distribution (QKD) system, while the secondary line utilizes Quantum Bridge's Distributed Symmetric Key Establishment (DSKE) which operates on the Symmetric-Key Distribution System (SDS). This infrastructure is designed to support cryptographic agility by integrating PQC and DSKE, allowing seamless interoperability with QKD technology.

The test aimed to evaluate disaster recovery strategies against communication failures during unexpected incidents. By implementing this within an IPsec VPN environment constructed using enterprise routers (SAE), the test ensured proper functionality of key management when integrated via an SKIP API. Results indicated that even if the primary line encountered failure, the system would automatically switch to the secondary line, preserving ongoing IPsec VPN communication sessions. This outcome validated that uninterrupted communication is viable while maintaining information-theoretical security, even with the combination of different quantum key distribution methods and paths.

Future Security Needs

As advancements in quantum computing progress, enterprises and societal infrastructures increasingly demand higher levels of security and reliability. Through this PoC, QNS Services has confirmed the effectiveness of integration techniques to incorporate quantum-safe communication technologies into near-operational networks.

Toshiba contributed its expertise in developing the QKD system, with each company's roles clearly defined in the network's overall design and evaluations of alternate methods.

Key Highlights of the PoC

• - Redundancy in Key Exchange Methods: Successfully demonstrated continuous encrypted communication during both switchovers and rollbacks between QKD and DSKE lines.
• - Resilience Utilizing Different Methods and Paths: Combines dedicated QKD lines with internet-capable DSKE to facilitate secure communication continuity, even during dedicated line failures.
• - Failover During High Data Transfer: Conducted a deliberate line interruption while transferring 30GB of data, confirming completion of the transfer without losing the communication session.

Executive Insights

Takeda Yoshiharu, Head of Toshiba’s QKD Business Promotion Office, shared his thoughts, stating:

“This PoC showcases the effectiveness of ensuring communication availability between critical sites during disasters in enterprise networks. Validating the redundant architecture integrating information-theoretical secure key distribution technology in near-real environments holds significant value. Toshiba is committed to advancing related technologies and collaborating with partners for social implementation.”

Looking Ahead

Based on insights from this proof of concept, QNS Services aims to launch a redundant quantum safe communication solution by 2026, targeting sectors such as finance, public services, and healthcare, where high security and business continuity are paramount. Future expansions will focus not only on domestic connections but also on various network environments, including remote islands and international sites, ensuring the implementation of communication infrastructures that maintain information-theoretical security.

About the Companies

QNS Services: A provider of quantum-resistant communication solutions, acting as the exclusive Japanese distributor of Quantum Bridge Technologies, it offers system integration, implementation support, and related services.

Toshiba Corporation: Engaged in QKD research since 1999, Toshiba has delivered numerous achievements regarding key distribution speed and communication distance. The company continues to advance the practical application of quantum secure communications through rigorous research, partner demonstrations, and proofs of concept, preparing for operational rollout.