What cloud assurance regimes have already taught us

A US federal agency consolidated thirty applications onto a FedRAMP High authorised platform, retiring duplicated control evidence and shared-service overhead. Documented savings of approximately $2M.

The control set is the direct bridge into the German market: roughly 70% of FedRAMP High controls map onto BSI C5:2020 criteria, so existing authorisation packages become the starting evidence base rather than sunk cost.

Following WannaCry, NHS England adopted the NCSC Cyber Assessment Framework across its provider estate — an outcome-based, risk-led model rather than a checklist.

The lesson carried into C5 work: objectives-driven assessment survives audit better than control-by-control attestation, because the rationale is documented alongside the control.

The ASD moved from a central certified cloud list to an assessor-led IRAP model, shifting accountability for risk decisions to the consuming agency.

Assessment-based regimes reward providers who can produce continuous evidence, not point-in-time artefacts — the same posture BSI auditors expect at type 2 attestation.

MTCS introduced the world's first tiered cloud security standard, letting buyers match assurance level to workload sensitivity across three tiers.

Tiering is the practical answer to scope creep in German engagements: classify workloads first, then certify to the level the tender actually requires.

Open Telekom Cloud holds both C5:2020 attestation and IT-Grundschutz certification — the combination German federal buyers increasingly treat as the entry threshold rather than a differentiator.

It sets the benchmark for US vendors entering through an EU entity: C5 attestation for the service, IT-Grundschutz alignment for the operating organisation behind it.