📊 Full opportunity report: AI Sovereignty Certification Standards Under Question: The 24% Rule Explains Why on ThorstenMeyerAI.com — validation score, market gap, and execution plan.
TL;DR
European cybersecurity standards like SecNumCloud enforce a 24% ownership limit to prevent foreign government control over cloud providers. This raises questions about sovereignty and compliance for US-based companies operating in Europe. The debate over certification meaning and legal jurisdiction is intensifying as more providers seek compliance.
European cybersecurity authority ANSSI’s SecNumCloud framework enforces a 24% ownership cap on non-EU investors to ensure legal sovereignty over cloud providers handling sensitive data. This rule is causing significant debate among industry stakeholders about the true meaning of sovereignty and the limits of existing certifications.
SecNumCloud, created by France’s ANSSI, is not a traditional certification but a government-issued qualification that requires providers to demonstrate ownership control within the EU, including a 24% ownership limit. This control measure is unique and arithmetic-based, making it a strict test of sovereignty, unlike security-focused standards like ISO 27001 or C5.
As of mid-2026, approximately nine to ten providers, including OVHcloud and Scaleway, have obtained active SecNumCloud qualifications, with more in the pipeline. The regulation is mandatory for hosting sensitive French public-sector data and is expanding to other critical sectors under EU directives like NIS2. US hyperscalers, unable to meet the ownership restrictions directly, are creating control structures through joint ventures, such as Thales-Google’s S3NS and Capgemini-Orange’s Bleu, to comply with the rule.
The 24% rule: why most “sovereign cloud” certifications don’t test sovereignty
ISO 27001. SOC 2. BSI C5. Gaia-X. Every badge real, audited, correctly displayed — and not one answers the question that decides the deal: can a foreign government compel your data? Exactly one European framework tests that. It does it with a number.
C5 does cover place of jurisdiction, data location & disclosure obligations. It requires you to declare which law reaches you. C5 tells you the gun is in the room.
Requires that no non-EU law can reach you at all — enforced by the ownership cap. SecNumCloud requires there be no gun. That’s the whole difference.
The proposed Cloud and AI Development Act (COM(2026) 502) would set four Union assurance levels for public procurement. Its own recitals concede the point: Cybersecurity Act certification “is not suited for addressing sovereignty concerns.” National labels won’t be banned — but a SecNumCloud provider would still need separate Article 17 recognition. If it passes, the badge on the vendor’s website stops mattering and the assurance level starts. Meanwhile ANSSI + BSI have jointly committed to common criteria specifying where failure is disqualifying.
Microsoft showed the gap better than any critic: May 2025 — encryption makes access “technically impossible.” One month later — cannot guarantee immunity from US authorities. Thirty days between the marketing and the law. SecNumCloud doesn’t ban American technology — it forces a change of control over it (hence S3NS = Thales+Google, Bleu = Capgemini+Orange on Azure). Is it also protectionism? Partly, yes — and that critique is exactly why EUCS High+ died. Both things are true. Don’t ask if a provider is “sovereign” — the word has been marketed into meaninglessness. Ask the arithmetic: who owns you, and what law reaches you? Then check whether the answer is above or below 24% — including for the European champions nobody has asked.
Implications of the 24% Control Limit for Cloud Providers
The 24% ownership cap fundamentally challenges the ownership and control claims of US-based cloud giants operating in Europe. It emphasizes the importance of legal sovereignty over security practices, potentially reshaping how providers structure their ownership and control mechanisms to meet European regulatory demands. This could influence global cloud strategies and data governance policies.
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European Frameworks and the Sovereignty Control Test
European security standards like ISO 27001, SOC 2, and BSI C5 primarily certify security practices but do not address jurisdictional control. In contrast, France’s SecNumCloud explicitly tests control through a quantitative ownership limit, making it unique. The framework reflects a broader EU push to ensure legal sovereignty over data, especially in sensitive sectors, amidst ongoing concerns about foreign government influence and extraterritorial law enforcement.
US cloud providers, such as AWS, remain subject to US laws like the CLOUD Act, which complicates compliance with sovereignty standards. To navigate this, they are establishing control structures via joint ventures that meet the 24% rule, but these arrangements raise questions about their authenticity and effectiveness.
“Achieving ISO 27001 is a 1 on the complexity scale, but SecNumCloud is a 10—it’s brutally hard and requires precise control over ownership and legal domicile.”
— Scalingo CEO
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Remaining Questions About Sovereignty Compliance
It is still unclear how many US providers will successfully restructure control arrangements to meet the 24% ownership cap long-term. The effectiveness of joint ventures in truly maintaining sovereignty, versus merely creating compliance structures, remains an open question. Additionally, the broader impact of these standards on global cloud market dynamics and legal interpretations is still evolving.
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Future Developments in European Cloud Sovereignty Rules
In the coming months, more providers are expected to seek SecNumCloud certification or establish control structures to comply with the 24% rule. Regulatory agencies are likely to expand the scope of the framework, potentially applying similar sovereignty tests to other critical sectors. Industry stakeholders will closely monitor legal challenges and the practical effectiveness of control arrangements in maintaining sovereignty claims.
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Key Questions
What is the 24% ownership rule in SecNumCloud?
The 24% rule limits individual foreign ownership to 24% and collective ownership to 39%, serving as an arithmetic test of legal sovereignty over cloud providers handling sensitive data in Europe.
Why is the 24% rule considered more effective than traditional security certifications?
Because it directly measures ownership control and legal sovereignty, rather than just security practices, making it a more definitive test of jurisdictional independence.
How are US cloud providers attempting to comply with the sovereignty standards?
They are creating joint ventures and control structures that meet the ownership caps, such as Thales-Google’s S3NS and Capgemini-Orange’s Bleu, to bypass direct ownership restrictions.
Does holding a SecNumCloud qualification mean a provider is immune from US law?
No. SecNumCloud primarily tests control within the EU; providers like AWS remain subject to US laws like the CLOUD Act, regardless of certification.
What are the implications for global cloud providers operating in Europe?
They must adapt ownership and control structures to meet sovereignty standards, potentially affecting their corporate structures and data governance policies across regions.
Source: ThorstenMeyerAI.com
