Babcock, Arqit Demonstrate Quantum-Safe Defense Communications
Babcock International Group and Arqit Quantum showcased a secure communications network designed to withstand future quantum decryption. During the DVD 2026 defense event, they successfully transferred scenario data between two locations, demonstrating a network built to resist quantum-enabled threats. This demonstration combined Babcock’s expertise in systems integration with Arqit’s software-defined encryption. This is particularly significant because military headquarters-to-platform communications are prime targets for adversaries who could intercept and store traffic today, then decrypt it once powerful quantum computers become available.
The Demonstration Explained
According to a September 22 press release, data was gathered at one site in Millbrook, encrypted using Arqit’s software, and then sent to Babcock’s Ground Deployed Advanced Mortar System (GDAMS) at another event location. The companies stated that this setup illustrated how a headquarters and a deployed platform could exchange operational information within a contested environment using a layered encryption network. They highlighted that the system operated without physical inline encryptors, presenting this as a way to reduce hardware requirements in the field.
Babcock explained its role involved creating end-to-end secure networks across various IP bearers, including 4G/5G, Wi-Fi, satellite communications, and traditional tactical and MANET radios. The GDAMS itself is based on the ST Engineering mortar design, enhanced with digital integration for quicker target engagement, as per the companies.
The Encryption Method
Arqit employs a software-defined symmetric key agreement, a proprietary method distinct from the lattice-based algorithms standardized by NIST as FIPS 203, 204, and 205. This approach also differs from quantum key distribution, which relies on the physical properties of photons over dedicated links. Arqit describes its platform as providing on-demand encryption keys that bolster VPNs, critical links, and cloud workloads. The company also offers a separate tool, Encryption Intelligence, designed to map cryptographic assets across an organization’s infrastructure.
Both companies emphasize the “harvest-now-decrypt-later” threat, where attackers collect encrypted traffic today, anticipating future quantum hardware to break the encryption. Though this is their framing, other vendors pursue similar objectives through different means, such as the Swiss post-quantum center discussed in a recent WISeKey and SEALSQ MoU.
It is important to note that this was a demonstration, not a deployment or a signed contract. It followed a Memorandum of Understanding (MoU) between the two companies covering secure networking, systems integration, digital engineering, and cryptographic work. Neither company disclosed details regarding throughput, latency, or node figures, and no independent assessment of the demonstration has been published. Louise Atkinson, CEO of Babcock’s Land and Mission Systems business, stated that the companies successfully showed how to build secure networks that safeguard operational data against future quantum-enabled threats.