Sovereign cloud explained simply: control, security, and trust in the digital world

It records who accessed which systems or data and when, which configurations were changed, and which administrative actions were performed. The logs are protected in such a way that they cannot be changed (unnoticed) retrospectively.

The three components of monitoring, logging, and tracing enable comprehensive system monitoring. All operating and security data is collected in one place. This allows you to monitor not only technical aspects, but also identify security-related events and potential compliance and data protection violations at an early stage.

SIEM (Security Information and Event Management) collects and correlates security logs to identify unusual patterns. A SOC (Security Operations Center) uses this information for monitoring and responds to emergencies according to defined processes.

Hardware-based encryption of the compute environment. For example, via a trusted execution environment (TEE) such as Intel SGX or AMD SEV. Many cloud providers already offer Kubernetes or other runtime environments in such an environment as a PaaS service.

For example, CNCF Stack to make workloads between clouds more flexible and reduce dependencies on providers (known as vendor lock-ins).

Containerized applications are automatically deployed, scaled, and monitored using the open-source Kubernetes platform. When you set up workloads on Kubernetes, you usually don't have to set up Kubernetes itself: many cloud providers offer it as PaaS. At the same time, this creates a uniform basis that makes switching to another provider much easier.

A multi-tenant-capable identity and access management (IAM) system is the central authority for identities and permissions. It clearly separates access between different teams, departments, or customers and makes it possible to track who (or what) is allowed to access what, and who (or what) is not. The basic principle here is “deny by default”: access is not permitted initially and is only granted if an explicit right has been assigned. This is typically done via role-based access control (RBAC) or attribute-based access control (ABAC).

Centralized, efficient management of digital user identities and access rights across the entire organization. This not only creates transparency about who has which rights, but also enables fast, controlled changes, for example, when roles change or employees leave the company.

Authorized users access different apps and systems with the same login credentials, even across organizational boundaries. This gives you more control and therefore more sovereignty, as you can manage identities centrally and revoke access across the board. At the same time, the administrative effort is reduced. This is implemented using standards such as SAML, OIDC, and OAuth2.

Accesses are checked for every request, regardless of whether they come from the internal network or from outside.

Uniformly defined specifications for access, encryption, networks, and workloads. Ideally, these policies are rolled out and enforced automatically, for example via policy engines such as OPA Gatekeeper or Kyverno. Provider-specific landing zones often provide predefined policies that serve as templates and can be expanded. This is particularly important as the amount of software in the cloud grows. New environments can thus only ever operate within the scope of the policies. In addition, automated configuration monitoring ensures continuous control. The systems are continuously checked for deviations from security standards.

You manage your cryptographic keys yourself. For example, using customer-managed keys (CMKs) or the Hold Your Own Key (HYOK) security principle, whereby individuals or organizations retain control over their encryption keys. For particularly high levels of protection, keys are stored in a hardware security module (HSM), either as a separate device or as a corresponding cloud service.

Many sovereignty requirements have not yet been established as clear standards. Initiatives such as GAIA X, which aim to create a common framework for networked, trustworthy data in the EU, are still in the development stage. Providers therefore interpret sovereignty differently. This leads to fragmentation: requirements, labels, and technical implementations vary depending on the provider, which makes comparisons and decisions difficult.

The use of proprietary APIs, databases, or identity systems from large hyperscalers creates dependencies. This means that you become so tied to one provider that switching later on is only possible at great expense. For greater portability, applications often need to be refactored. This means that code and architecture are specifically rebuilt so that they work with standardized interfaces and can also run in other cloud environments. This costs time and resources.

Key management and encryption concepts such as CMK, HYOK, or HSM are essential for a sovereign cloud, but challenging to operate. The same applies to complex IAM systems and authorization concepts.

Expertise in cloud security, cryptography, DevSecOps, and zero trust is in short supply. Without these skills, the risk of misconfigurations and project delays increases.

For a sovereign cloud, processes and responsibilities often need to be fundamentally redesigned. Because this changes established procedures and responsibilities, implementation in existing structures often meets with resistance.

Roles, guidelines, and responsibilities must also be redefined. It is often unclear at first who will assume the position of key manager, identity owner, or policy owner.

High-end solutions are often more expensive than standard offerings. EU providers often lack PaaS services (Platform as a Service: ready-made services operated by the provider, such as managed databases or monitoring). As a result, operational expertise must increasingly be built up internally or purchased externally. This increases effort and running costs.

Sovereign clouds mean greater flexibility, but also greater personal responsibility. To ensure that new tools and operating models run reliably, training, certification, and systematic skills development are required. In practice, this is often underestimated, and the transformation takes longer than planned or knowledge is distributed unevenly.

In addition to technology, laws, regulations, and documentation requirements also limit the scope for action. At the same time, lengthy procedures and changing conditions can slow down the implementation of the sovereign cloud.

Supply chains for hardware, chips, and security components can be affected by geopolitical tensions. This contradicts the goal of reducing dependencies.

In practice, three sets of objectives collide: the state demands maximum sovereignty and verifiability. The economy wants cost and innovation efficiency, while providers want to impose their own cloud platforms.

Tenders often take a long time, especially when they are in the public sector. Because sovereign systems are often more expensive and take longer to implement, established providers are often given preference in procurement procedures.

Certification processes are often very lengthy. It can take years to obtain certifications such as C5, ISO, or EUCS. This causes immense delays in innovation.