What Is Sovereign Cloud – and Why Most Providers Fall Short
Blog post from Duality
Sovereign cloud is presented as a model that aims to keep data, infrastructure, and operations under the exclusive legal and operational control of one jurisdiction, distinguishing it from simple data residency, which only determines where servers are located. The discussion argues that many offerings remain vulnerable to foreign legal demands because laws such as the US CLOUD Act can compel US-controlled providers to disclose data held abroad, while European initiatives and locally controlled subsidiaries seek to reduce this exposure without necessarily eliminating it. It identifies data residency, locally controlled operations, and technical sovereignty as three required layers, with the last relying on customer-held encryption keys and privacy-enhancing technologies to prevent providers from accessing readable data even during computation. Technologies including confidential computing, fully homomorphic encryption, and secure multi-party computation are described as ways to enable protected cloud processing and cross-border collaboration. Organizations with especially sensitive government, defense, health, or critical-infrastructure workloads may build their own sovereign clouds, although this entails substantial cost and operational tradeoffs; other organizations are encouraged to assess providers’ jurisdictional exposure, access to plaintext, key control, operational independence, and audit evidence.
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