Toulouse, France & Valencia, Spain — 26.02.2026. CYSEC, a leading provider of cybersecurity and data protection solutions for space and critical infrastructure, and FENTISS, a pioneer in safety and virtualization software solutions, today announced a strategic partnership to enhance end-to-end security for satellite and space communications systems.
The collaboration brings together CYSEC’s ARCA SATLINK, a cutting-edge secure communication solution for satellite ground and space segments, with FENTISS’ XtratuM/Next Generation (XNG), a bare-metal hypervisor designed to ensure strict temporal and spatial isolation in multicore space platforms.
Strengthening Security Across Space Communication Architectures
As satellite constellations grow in complexity and connectivity, cybersecurity and system isolation have become fundamental requirements to ensure mission continuity, data integrity, and protection against cyber threats. The joint solution leverages the complementary strengths of both companies to deliver enhanced security at both the communications and platform levels.
ARCA SATLINK provides robust cryptographic protection, secure key management, and trusted communication channels tailored for satellite operations. The solution enables operators to secure telecommand, telemetry, and payload data links while ensuring compliance with stringent regulatory and operational requirements.
XtratuM complements this capability by guaranteeing multiple applications with different criticality levels share the same hardware without interference. Its architecture enforces a robust isolation that prevents any fault or cyber threat from spreading across partitions.
Delivering Trusted Multi-Domain Space Systems
By integrating ARCA SATLINK with XtratuM-based platforms, satellite manufacturers and operators benefit from a comprehensive architecture where safely partitioned execution meets protected communication channels. The partnership enables:
- Consolidation of critical and non-critical functions on a single On-Board Computer (OBC), reducing SWaP (Size, Weight, and Power) requirements.
- Mitigation of lateral movement by isolating the communication stack from the rest of the flight software.
- Simplified qualification and re-qualification pathways, as changes in one partition do not affect the others.
- A smooth transition from monocore to multicore architectures for software-defined satellite missions
“Cybersecurity must be designed as a system-wide capability, spanning both the communication layer and the execution environment” said Mathieu Bailly, VP at CYSEC. “By combining ARCA SATLINK with FENTISS’ XtratuM technology, we are providing customers with a highly trusted and resilient security foundation for next-generation space missions”.
“FENTISS is committed to reducing the integration effort for complex space systems” said Manuel Muñoz, CEO at FENTISS. “This partnership allows both companies to extend these guarantees to secure satellite systems, helping customers deploy robust and certifiable solutions that meet the evolving threat landscape.”
Supporting the Future of Software-Defined and Secure Space
The joint offering is particularly suited for modern satellite architectures relying on software-defined payloads, reconfigurable onboard processing, and multi-mission platforms. Together, CYSEC and FENTISS aim to support satellite primes, subsystem integrators, and institutional and commercial operators seeking to strengthen cybersecurity posture while maintaining system performance and flexibility.
The two companies plan to collaborate on joint demonstrations, reference architectures, and customer engagements across European and international space programs.
About CYSEC
CYSEC is a Switzerland-based cybersecurity company specializing in data protection and secure communications for space systems, defense, and critical infrastructure. Its solutions enable organizations to secure sensitive data and communications across complex and distributed environments.
About FENTISS
FENTISS is a leading European provider of high-reliability virtualization solutions for safety-critical systems. Headquartered in Spain with a strategic presence in Toulouse, France, the company’s flagship hypervisor, XtratuM, has become a benchmark in the aerospace industry. The platform enables the seamless integration of critical and non-critical applications onto a single hardware platform, ensuring strict temporal and spatial isolation to prevent any cross-system interference.
Media Contacts:
Alexandra Vaillant : marketing@cysec.com
Ana Rísquez Navarro : marketing@fentiss.com