What are the key data sovereignty challenges in a hybrid cloud for global firms?

All answers to this question.

Sovereignty is the number one concern for our European clients. BYOK is a great start, but many regulators are moving toward requiring "Confidential Computing" where data is encrypted even during processing in memory. For our hybrid setup, we use an on-premise hardware security module (HSM) to manage keys. This ensures that even if the public cloud provider is subpoenaed, they literally do not have the technical capability to decrypt the data. You should also look into "data residency" tagging in your storage layer to ensure that any data categorized as 'Sensitive' is never replicated to a region outside of its legal jurisdiction.

   Answered 2025-02-15 by Jessica Taylor

Have you considered using a "data clean room" architecture where the public cloud AI only sees aggregated, anonymized datasets rather than raw PII (Personally Identifiable Information)?

   Answered 2025-02-25 by James Smith

• James, we’ve looked into that, but the data science team complains that anonymization loses too much of the "signal" for their predictive models. We are now testing differential privacy techniques to see if we can strike a balance between strict legal compliance and model accuracy.

     Commented 2025-03-05 by Christopher Brown

Documentation is your best friend. Keep a real-time log of every data movement between on-prem and the cloud for your next audit. It's not just about being secure; it's about proving it.

   Answered 2025-03-12 by Patricia Moore

• Very true, Patricia. Our last auditor spent more time looking at our data flow diagrams than our actual encryption settings. If you can't visualize the flow, you aren't compliant.

     Commented 2025-03-15 by Robert Wilson