Mattermost and Arqit Partner to Strengthen Post-Quantum-Secure Collaboration for Defence Operations
Mattermost and Arqit are partnering to deliver sovereign, post-quantum-secure operational collaboration for Defence Ministries, NATO Allies, and coalition partners worldwide.
The partnership combines Mattermost’s secure, mission-critical command-and-control surface with Arqit’s post-quantum cryptographic infrastructure to provide a two-layer zero-trust collaboration environment where access is both policy-governed and cryptographically assured at the device level.
As defence organisations operate across increasingly contested, distributed, and high-risk environments, ensuring the integrity of communications, devices, and access has become as critical as the ability to coordinate and act. This joint capability is designed to address that challenge directly.
A Sovereign Collaboration Layer with Post-Quantum Security Foundations
At the core of this partnership is a sovereign, deployment-agnostic collaboration layer that enables operators to access mission workflows, intelligence feeds, and partner applications through a unified command-and-control surface.
Unlike traditional approaches to secure collaboration, this environment is designed with post-quantum security foundations, supporting resilience not only against today’s threats, but against emerging risks posed by quantum computing.
This allows defence organisations to operate securely across infrastructure environments without dependence on a single cloud provider or vendor, maintaining sovereignty and control over mission-critical operations.
From Identity to Device-Level Trust
A defining feature of this partnership is the shift from identity-based access alone to device-level zero-trust authentication.
In this model, valid credentials are not sufficient on their own. Only verified devices operating on trusted networks are permitted to access protected collaboration environments. Compromised or untrusted devices can be isolated from protected environments, helping reduce lateral movement and operational risk.
This moves security closer to the point of execution, ensuring trust is continuously verified, not assumed.
A Two-Layer Zero-Trust Model for Coalition Operations
Together, Mattermost and Arqit deliver a two-layer zero-trust model that combines:
- Policy-based access control at the application level
- Cryptographic device authentication at the infrastructure level
This approach can support more dynamic access enforcement across multinational coalitions. As the sensitivity of a channel or operation changes, access policies and device-level trust controls can help ensure that only appropriately authorised personnel using verified devices remain within the protected environment.
The result is a more secure and adaptive collaboration model, designed for the realities of coalition operations where trust boundaries are constantly shifting.
Built for Contested and Future Threat Environments
The joint capability is designed to operate across complex defence environments where threats are evolving and infrastructure cannot be assumed to be secure.
With post-quantum cryptographic assurance embedded at the device level, organisations can strengthen secure communications across distributed teams, systems, and networks, helping protect sensitive operations today while preparing for future threat environments.
Demonstrating the Capability in Action
The capability will be demonstrated as part of an integrated operational environment, showing how defence teams can collaborate across classification boundaries while maintaining device-level trust and post-quantum cryptographic assurance.
The demonstration provides a practical view of how defence teams can coordinate effectively while maintaining strict control over access, devices, and data.
A Force-Multiplying Partnership
“As defence operations become more distributed and contested, the ability to ensure trust at every level of the system becomes critical. By combining secure collaboration with post-quantum cryptographic assurance, we’re enabling defence teams to operate with confidence across complex environments where traditional security models are no longer sufficient.”
— Seán Carnew, Senior Director Government & Defence, Arqit
“Secure collaboration in defence is no longer just about controlling access; it’s about continuously verifying trust across users, devices, and environments. By working with Arqit, we’re extending Mattermost’s secure collaboration and workflow capabilities with cryptographic assurance at the device level, enabling teams to coordinate and act with confidence in high-risk environments.”
— Jason Blais, VP Product & NATO Alliances, Mattermost
This partnership reflects a broader shift in defence: toward security models that are not only zero trust, but cryptographically assured and resilient to future threats.
By embedding post-quantum security foundations into operational collaboration, Mattermost and Arqit are helping defence organisations coordinate, act, and protect mission-critical operations with greater confidence across coalition environments.
About Arqit
Arqit Quantum Inc. (Nasdaq: ARQQ, ARQQW) secures the world’s most critical data with quantum-safe encryption. Combining the security of PSKs with the flexibility of PKI, Arqit’s products are software-based, hyper-scalable, and NSA/NCSC guidance compliant, making them ideal for the evolving digital battlespace. Learn more at www.arqitgroup.com
