Space research is strategic by nature.
It supports science, industry, infrastructure, environmental monitoring, communications, navigation, security and long-term technological development. The systems behind it are complex, collaborative and increasingly digital. Data moves between organisations. Software connects platforms. Ground systems depend on trusted networks. Research partnerships extend across borders and sectors.
In this environment, secure communication is more than a technical requirement.
It is part of digital sovereignty.
Digital sovereignty is often discussed in terms of infrastructure, data location, industrial capability or regulatory control. These are important. But sovereignty also depends on the ability to communicate securely, manage trust independently and protect sensitive information across the full lifecycle of a project.
If critical communication depends on systems that cannot be audited, updated, controlled or trusted, sovereignty is weakened.
For space research, this matters because communication sits at the centre of cooperation. Partners need to exchange research data, operational information, technical documentation, software, access credentials and project decisions. Some of this information may remain sensitive for years. Some may relate to infrastructure, advanced technology or public-sector priorities.
The question is not only whether communication is encrypted.
The question is who controls the trust behind it.
Cryptographic control and post-quantum readiness
A secure communication environment depends on cryptographic keys, certificates, identity systems, authentication mechanisms, software updates, monitoring platforms and operational procedures. Each of these elements can create dependency. Each can also become a point of resilience if it is designed and governed properly.
Cryptographic control is therefore central to digital sovereignty.
Organisations need to understand which cryptographic mechanisms protect their systems, who manages the keys, where trust anchors are located, how certificates are issued, how software is signed and how algorithms can be replaced when required. Without this visibility, security decisions become dependent on external assumptions.
This becomes even more important in the context of post-quantum security.
The transition to post-quantum cryptography will require organisations to review how encryption, key exchange, digital signatures and certificates are used across their systems. It will affect suppliers, standards, procurement, long-term data protection and system architecture. Organisations that have little control over their cryptographic environment will find the transition harder to manage.
Digital sovereignty in the post-quantum era will not be achieved by waiting for technology to change around us.
It will require preparation.
That preparation begins with visibility. Organisations need to know where sensitive communication takes place, which systems support it, which suppliers influence it and which cryptographic dependencies are embedded inside it. They need to understand not only the main platforms, but also supporting services: identity providers, certificate authorities, update channels, monitoring tools, cloud services and operational workstations.
Control, suppliers and software supply chains
The next step is control.
Control does not mean building everything alone. Modern space research depends on partnerships, specialised suppliers and international cooperation. Sovereignty should not be confused with isolation. The issue is whether organisations can make informed decisions, manage dependencies and maintain trust when technology, suppliers or threat conditions change.
A sovereign approach to secure communication should allow organisations to choose, verify, replace and govern the technologies they depend on.
That includes supplier transparency.
Suppliers should be able to explain how cryptography is implemented, how updates are delivered, how vulnerabilities are handled, how long products will be supported and how future security requirements will be addressed. For systems with long operational lifecycles, these questions are not administrative. They directly affect resilience.
A technology that cannot be maintained becomes a liability.
A service that cannot explain its trust model creates uncertainty.
A platform that cannot support future cryptographic migration may become a strategic constraint.
The same applies to software supply chains. Secure communication depends on software that can be verified and updated safely. Digital signatures, protected build environments, controlled repositories and clear update processes all contribute to trust. If software integrity depends on opaque or fragile processes, the wider communication environment is exposed.
Data governance and long-term confidentiality
Digital sovereignty also depends on data governance.
Sensitive space research data may move across institutions, cloud environments, collaboration platforms and partner systems. Organisations need to know where data is stored, how it is protected, who can access it, how long it is retained and under what conditions it may be shared.
Long-term confidentiality is especially important.
Some information does not lose value quickly. Technical designs, research outputs, system documentation and operational knowledge may remain sensitive far beyond the duration of an individual work package. This is one reason why quantum-era risks cannot be dismissed as future concerns. Data captured today may still matter when cryptographic capabilities change.
A sovereign security model must therefore consider the lifetime of information, not only the moment of transmission.
Interoperability, resilience and crypto-agility
Interoperability is another key factor.
Space research depends on cooperation. Systems must work across organisational and technical boundaries. But interoperability should not require lowering security expectations or accepting uncontrolled trust. The stronger model is secure interoperability: shared communication that is based on clear identity, defined access, robust encryption, governed metadata, auditable activity and adaptable cryptography.
This allows cooperation without giving up control.
It also supports European strategic autonomy by reducing avoidable dependence on unmanaged or non-transparent communication models.
Resilience is equally important.
Digital sovereignty is not only the ability to prevent incidents. It is the ability to continue operating, recover trust and adapt when conditions change. Secure communication systems should therefore be designed with incident response, key rotation, certificate replacement, supplier escalation, backup communication paths and post-incident recovery in mind.
A system that cannot recover trust after an incident is not truly sovereign.
It is dependent on circumstances remaining favourable.
For space research, this is not a theoretical issue. Collaboration environments change. Suppliers change. Standards change. Threats change. Cryptographic requirements change. Projects that last for years need communication systems that can remain secure through that change.
This is where crypto-agility becomes part of sovereignty.
A crypto-agile system can adapt its cryptographic mechanisms without a complete redesign. It allows organisations to respond to new standards, vulnerabilities and post-quantum requirements in a controlled way. It reduces the risk of being locked into obsolete assumptions. It gives decision-makers more options.
Sovereignty is strengthened by options.
It is weakened by lock-in.
Zero Trust principles also support this direction. By verifying users, systems, services and partners before granting access, organisations reduce reliance on broad implicit trust. This is particularly useful in distributed research environments, where cooperation crosses institutional boundaries. Trust becomes explicit, limited and managed.
That is a stronger basis for secure collaboration.
Metadata protection should also be considered. Even when message content is encrypted, communication patterns can reveal relationships, activity levels, infrastructure dependencies and operational timing. For sensitive research environments, digital sovereignty includes control over this surrounding information as well.
Secure communication is therefore not one control. It is a strategic capability made up of architecture, cryptography, governance, supplier management, operational discipline and long-term planning.
The COSMOS-SECURE perspective
COSMOS-SECURE is focused on secure communication in space research because this capability is becoming increasingly important.
The project reflects a broader need: to build communication environments that are trusted, resilient and ready for the future. That means protecting sensitive cooperation today while preparing for tomorrow's cryptographic and cyber risks.
For organisations involved in space research, practical steps are clear.
Map critical communication flows. Identify cryptographic dependencies. Understand supplier trust models. Strengthen identity and key management. Protect software update chains. Classify data by confidentiality lifetime. Design systems for crypto-agility. Include post-quantum readiness in procurement and architecture decisions. Treat secure communication as part of strategic resilience.
Digital sovereignty is not achieved through declarations.
It is built through systems that can be trusted, governed and adapted.
For Europe's space research ecosystem, secure communication will be one of the foundations of that future. It will enable cooperation without unnecessary exposure, innovation without uncontrolled dependency and long-term research without losing control of trust.
That is the direction COSMOS-SECURE is working toward: secure communication that supports resilience, sovereignty and confidence in the technologies shaping the decades ahead.