How we can protect our critical space assets

A disruption at an upstream supplier can reverberate through multiple downstream production lines. Supplier concentration increases this risk, as essential space components often come from a limited pool of specialised vendors. Qualifying an alternative supplier can take months or years, so any quality issue, insolvency, or geopolitical upheaval at one supplier can trigger a chain of delays, cost overruns, and significant setbacks.

Lower-tier suppliers often operate beyond direct oversight, creating blind spots for cybersecurity compliance. Hidden risks like unpatched software vulnerabilities, poor incident response capabilities, and weak authentication practices can easily go unnoticed in lower tiers.

Regulatory measures such as export controls, sanctions, and foreign investment screening can disrupt supply lines or block technology transfers, creating immediate availability challenges. Meanwhile, foreign acquisitions of small but critical suppliers raise serious intellectual property (IP) concerns, risking exposure of sensitive designs and loss of control over proprietary technologies.

Europe's space supply chains combine legacy operational systems, specialised manufacturing tools and commercial off-the-shelf (COTS) components. This mix creates a broad attack surface with uneven security maturity. A single weak link, such as an outdated protocol or insecure integration, can enable ransomware or credential theft, disrupt production and delay critical deliveries.

Standards are an effective lever for raising security across a fragmented supply chain. The precedent already exists in other critical sectors: nuclear installations operate under the strict regimes of the International Atomic Energy Agency (IAEA) and the International Electrotechnical Commission (IEC).

The space sector must take the same approach. Frameworks such as the European Cooperation for Space Standardization (ECSS), the European Space Components Coordination (ESCC), and the EU's Network and Information Security Directive (NIS2) should be embedded from the earliest programme stages and reinforced through contractual cybersecurity requirements. Applied uniformly, they establish a common baseline that uplifts even the least mature suppliers—and periodic independent verification ensures that baseline holds over time.  

Security must be embedded across the ecosystem, not treated as a contractual requirement alone. Small and medium-sized enterprise (SMEs) need practical knowledge, tools and training to strengthen their security capabilities. The semiconductor industry offers a proven model: sector-wide collaboration that raises capability rather than simply raising the bar. Space sector stakeholders should unite to build industry-specific programmes that make strong cybersecurity achievable for suppliers of every size.

Resilience in space begins with accepting that no single control is sufficient against a determined adversary. Security must be layered deliberately across hardware, software, and operations—clear network segmentation, hardware roots of trust, signed software updates, and a broader set of resilience measures working in concert. Designed this way, the failure of one control becomes an inconvenience rather than a mission-ending event.

The window between vulnerability disclosure and exploitation is narrowing. This makes rapid, transparent patching a baseline requirement for ground systems and mission-critical software. This demands secure update distribution, verification mechanisms to guarantee integrity, and contingency plans for applying patches where connectivity or access is limited.

Security validation is too often treated as a box to tick rather than a discipline to sustain. Continuous, integrated testing across the entire lifecycle—from mission design through to decommissioning—shifts the balance, surfacing vulnerabilities early enough to mitigate them before they become exploitable.

A satellite launched today may still be flying in the 2050s—long after the public-key cryptography now protecting it has been rendered obsolete by quantum computing. Because in-orbit systems are difficult to update, post-quantum thinking must be designed in from the start rather than retrofitted later. That means designing for crypto-agility, using hybrid approaches during the transition and putting robust quantum key management in place.