C3A – explained simply

What is C3A?

C3A stands for “Criteria enabling Cloud Computing Autonomy” and refers to a criteria framework developed by the German Federal Office for Information Security (BSI). The aim of C3A is to make the sovereignty characteristics of cloud services more transparent and easier to assess.

The focus is on how independently companies, public authorities and other organizations can use cloud services. This includes identifying dependencies on individual providers, preserving freedom of decision, improving migration options and assessing risks in a structured way within the respective usage context.

C3A is therefore not a classic security standard like ISO 27001 and not a direct replacement for the C5 attestation. Rather, C3A complements existing security and compliance assessments with the aspect of digital sovereignty. For cloud customers, the criteria framework can provide important guidance when they want to use cloud services not only securely, but also in a controllable, traceable and flexible way over the long term.

What are the characteristics of C3A?

C3A is defined by several key characteristics:

Focus on cloud autonomy: C3A considers the extent to which cloud customers can use a service independently. This includes aspects such as transparency, controllability, control options and the ability to consciously assess dependencies.

BSI criteria framework: The framework was developed by the German Federal Office for Information Security and is intended to make the sovereignty characteristics of cloud services more traceable. This creates a structured basis for assessments and procurement decisions.

Complement to existing standards: C3A does not replace established security standards or attestations. Instead, the criteria framework complements existing requirements for information security, data protection and compliance with questions of digital sovereignty.

Risk-based assessment: C3A takes into account that requirements for autonomy may vary depending on the organization, protection needs and usage scenario. Companies can therefore evaluate cloud services within their respective risk context.

Transparency regarding dependencies: An important component of C3A is the visibility of possible technical, organizational or contractual dependencies. These may include platform lock-ins, data portability, interfaces, operating models or legal frameworks.

Guidance for cloud procurement: C3A can help companies and public sector organizations compare cloud offerings in a more structured way. Especially when sensitive data, critical business processes or long-term cloud strategies are involved, the criteria framework supports well-founded decisions.

Strengthening digital sovereignty: C3A contributes to the goal of using cloud services in a way that allows organizations to preserve their ability to act, their control and their freedom of decision over the long term.

What benefits does C3A offer?

C3A helps companies evaluate cloud services not only according to price, performance or technical functionality, but also according to their relevance for digital sovereignty. This makes it more visible how strongly a company depends on certain platforms, contractual models, technologies or operating structures.

For cloud customers, C3A creates more transparency when selecting and evaluating cloud services. The criteria framework helps identify potential risks early and classify them more effectively. This is particularly important when cloud services are used for sensitive data, business-critical applications or regulated industries.

C3A also offers clear strategic value. Companies can plan their cloud architecture more consciously, take migration options into account and give greater weight to requirements for data portability, interfaces, control and traceability in their decisions.

In the areas of compliance and risk management, C3A can usefully complement existing audits. While standards such as ISO 27001 primarily address information security and C5 considers specific security requirements for cloud services, C3A focuses more strongly on self-determination and the avoidance of dependencies in cloud usage.

For IT, cloud and hosting providers, C3A is also relevant because customers increasingly want to understand how sovereignly a cloud service can be operated and used. Providers that offer transparent operating models, clear data locations, open interfaces and controllable processes can build trust as a result.

Overall, C3A provides an important foundation for evaluating cloud services more holistically, making digital sovereignty more measurable and consciously managing long-term dependencies in cloud strategy.