Arqit Invests in Sirius to Boost Quantum-Safe Tech
The companies aim to accelerate secure communication tools for defense and government sectors across NATO nations.
Updated on Oct. 20, 2026 in Quantum Computing
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Encryption provider Arqit Quantum Inc. has made a strategic investment in Sirius Computer, Inc. to enhance the integration of their quantum-safe connectivity technologies. This partnership focuses on expanding the reach of the Crux platform to defense and intelligence agencies.
Why it matters
The collaboration seeks to deliver robust, quantum-safe communication services for government users by integrating specialized hardware with advanced encryption keys. It specifically targets securing critical infrastructure against future quantum-computing threats.
The Crux platform integrates Sirius secure networking technology with Arqit's Sovereign Key Platform and NetworkSecure adaptors. The system is designed to run on commercial devices and operate alongside existing network infrastructure.
The players
Arqit Quantum Inc.
Headquartered in London, this company specializes in providing quantum-safe encryption technology.
Sirius Computer, Inc.
This firm develops secure computing and networking solutions for defense and intelligence sectors with operations in the US, UK, and Germany.
The details
This joint effort leverages the strengths of both companies to serve the defense and intelligence sectors. The companies are currently collaborating as part of a bidding consortium to provide secure networking services for NATO.
Timeline
Arqit announced the strategic investment in Sirius on October 20, 2026.
The Tech Race
This partnership reflects the broader shift toward hardening military and government networks against emerging quantum computing threats. It positions the firms to compete for major contracts by replacing legacy encryption methods with quantum-safe standards.
While the immediate impact is focused on defense and government infrastructure, the reliance on commercial devices for these tools suggests wider applications for secure enterprise connectivity. Users of these systems will gain enhanced data protection without needing to overhaul their hardware.
The takeaway
Quantum-safe encryption is becoming a foundational requirement for government security portfolios worldwide. Organizations should evaluate how such integrated platform technologies can protect sensitive data flows against future computational advancements.
Further reading
Find more analysis on the rapidly evolving sector in our Quantum Computing section.
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