Can strategic reversibility help Europe finally achieve digital sovereignty?

European debates on digital sovereignty often begin from a premise of absence: Europe does not control its cloud infrastructure, does not dominate semiconductor manufacturing, and does not lead global cybersecurity tooling markets. From this diagnosis follows a familiar policy ambition, namely to recover autonomy through localisation, regulation, or industrial policy. This framing risks misunderstanding the security problem Europe actually faces.

The central issue is not absolute dependence, but the conditions under which dependence becomes strategically exploitable. Europe’s reliance on non-European cloud providers, semiconductor supply chains, and security technologies is not inherently destabilising. It becomes a security liability when dependencies cannot be managed, substituted, or unwound under pressure. Cybersecurity resilience, in this sense, is less about ownership and more about control over escalation, continuity, and recovery.

Digital sovereignty supports European cybersecurity interests only when it is designed to maximise strategic reversibility – Europe’s ability to adapt, substitute, or disengage from critical digital dependencies within politically and operationally meaningful timeframes. 

Drawing on threat landscape data, recent European initiatives, and comparative international approaches, I propose design principles that treat sovereignty not as an end state, but as a security function.

Rethinking the sovereignty-security relationship

Digital sovereignty is commonly described through legal and territorial lenses, focusing on data location, jurisdiction, or ownership. From a cybersecurity perspective, these are secondary attributes. What matters is control over key decision points during crisis scenarios: who can access systems, who can compel disclosure, who can interrupt service, and who can restore functionality.

Seen this way, sovereignty operates through what can be described as control surfaces within digital systems. These include identity and access management, cryptographic key control, update and patch pipelines, incident response authority, and supply chain continuity. Security risk increases not when these surfaces are foreign-owned per se, but when they are opaque, inflexible, or externally constrained.

This reframing helps explain why some sovereignty initiatives improve security while others do not. Data localisation may change jurisdictional exposure without improving incident response capability. Conversely, investment in interoperable identity systems or open cryptographic standards can materially increase resilience without altering ownership structures. 

For example, consider interoperable identity systems. When an organisation depends on a single proprietary authentication provider, any disruption (technical failure, cyberattack, or geopolitical pressure) can lock users out entirely, with recovery dependent on that provider’s timeline.

An interoperable framework allows authentication to shift to alternative systems, such as internal directories, federated partners, or backup services, without reconfiguring applications. The organisation retains control over the critical decision point: who can authenticate users when the primary mechanism fails. The resilience gain is operational, not ownership-based.

The EU threat environment underscores the relevance of this distinction. The European Union Agency for Cybersecurity (ENISA) Threat Landscape 2025 highlights a sustained pattern of ransomware, DDoS campaigns, and state-aligned intrusion targeting public administration and critical infrastructure

These incidents are characterised less by data exfiltration than by service disruption, coercion, and signalling. In such contexts, the decisive factor is often recovery speed and operational control, not formal sovereignty.

Where European sovereignty efforts fall short

European regulatory initiatives have improved baseline security hygiene. The 2022 NIS2 Directive expands risk management and reporting obligations across critical sectors while the 2024 Cyber Resilience Act embeds security requirements into product lifecycles.

These measures address real weaknesses, particularly in previously under-regulated sectors such as digital service providers, public administration, and manufacturing, areas that were either excluded from NIS1 or subject to inconsistent requirements across member states.

However, their strategic impact remains limited by two structural issues. First, uneven national implementation fragments enforcement and weakens collective response. Second, regulation alone does not alter control surfaces during high-impact incidents. Compliance does not guarantee that systems can be reconfigured, isolated, or restored under external pressure.

The GAIA-X initiative, conceived as a sovereign cloud framework, illustrates this limitation. By prioritising governance alignment over operational capability, it has thus far fallen short of changing Europe’s practical ability to substitute or disengage from dominant providers. As a result, it has delivered little additional resilience despite significant political investment.

In contrast, narrowly scoped initiatives have produced tangible security benefits. Public sector migrations to open-source productivity tools and private clouds for sensitive workloads, such as those undertaken in the German state of Schleswig-Holstein and France’s NUBO Cloud project, directly increased control over update cycles, identity management, and incident response. Their value lies not in symbolism, but in reduced dependency friction.

Semiconductors and the limits of industrial sovereignty

Semiconductors present the hardest case for European digital sovereignty. The EU’s limited share of global production, combined with concentrated chokepoints in design tools and manufacturing equipment, creates systemic exposure. The EU Chips Act responds to this challenge through scale investment and capacity building.

From a cybersecurity perspective, however, the critical question is not whether Europe must produce more chips, but whether it can trust, verify, and sustain the components embedded in critical systems under adverse conditions. Hardware backdoors, firmware compromise, and supply disruption are security risks that cannot be mitigated solely through volume.

Current European strategies focus heavily on production targets and market share. Less attention is paid to resilience properties such as component traceability, verifiable design pipelines, and contingency access to specialised manufacturing. Without these, increased capacity does not necessarily translate into reduced strategic vulnerability. The European Court of Auditors’ 2025 Special Report on the EU Chips Act reinforces this concern.

Japan’s approach offers a useful contrast. Under its Economic Security Promotion Act, Japan prioritises control over indispensable inputs, including semiconductor materials, critical minerals, and key industrial components rather than comprehensive industrial dominance. This logic aligns more closely with cybersecurity requirements, where trust and recoverability outweigh output.

Strategic reversibility as a security objective

My core contribution in this essay is the proposal of ‘strategic reversibility’ as the organising principle for sovereignty-driven cybersecurity policy.

Strategic reversibility refers to the capacity to modify, substitute, or disengage from digital dependencies within timeframes that preserve political and operational choice. It is measured not in ownership percentages, but in days, weeks, or months of regained control during crisis scenarios.

Under this model, a cloud environment is more sovereign if workloads can be migrated, isolated, or reconfigured without vendor cooperation. A cryptographic system is more sovereign if key control remains independent of platform providers. A semiconductor supply chain is more sovereign if critical systems can be maintained or repaired despite external disruption.

This reframing yields different policy priorities. It favours interoperability over localisation, transparency over exclusivity, and contingency planning over comprehensive autonomy. It also explains why some non-European dependencies may be acceptable if they are reversible, while some domestic dependencies may remain risky if they are brittle.

Design principles for sovereignty-driven cybersecurity

Several design principles follow from this approach.

First, Europe should prioritise control over critical security functions rather than ownership of platforms. Identity management, cryptographic key infrastructure, update mechanisms, and incident response authority should remain independently operable, even when built on foreign infrastructure.

Second, procurement policy should reward reversibility. Public sector contracts should require exit pathways, interoperability standards, and documented migration timelines, not merely compliance attestations.

Third, open-source software should be treated as strategic infrastructure because it reduces dependency friction. Its value lies not only in transparency, but in the ability to maintain, adapt, and redeploy systems without external permission.

Fourth, threat intelligence and response coordination must remain transnational. Sovereignty that impedes information-sharing weakens security. Control over response does not require isolation from allies.

Finally, semiconductor policy should focus on verifiability and continuity rather than scale alone. Trusted design pipelines, auditable firmware, and secured access to specialised manufacturing matter more for cybersecurity than headline production capacity.

A new understanding of digital sovereignty

Digital sovereignty can support European cybersecurity interests, but only if it is redefined. Sovereignty conceived primarily as ownership or localisation offers limited protection against contemporary cyber threats. Sovereignty designed around operational control offers something more valuable: time, choice, and resilience under pressure.

Europe’s challenge is not to eliminate dependence, but to ensure that dependence cannot be readily weaponised. This requires shifting attention from abstract autonomy to practical resilience, from frameworks to control surfaces, and from symbolic projects to deployable capability.

Strategic reversibility, rather than autonomy or localisation, should be treated as the primary security metric for evaluating digital sovereignty initiatives. On that basis, the decisive question for Europe is no longer whether it can become digitally sovereign in principle, but whether it can design digital systems that remain governable when strategic conditions deteriorate.

Read the other 2025-2026 Binding Hook-Munich Security Conference Essay Prize Competition winners here.