Hld
System Design
Hard
SovereignStream: Cross-Border Data Governance
Design a global financial transaction monitoring system that operates in 100+ countries, each with conflicting data residency and privacy laws (e.g., GDPR, CCPA, and local banking secrecy acts). The system must detect fraud in real-time by analyzing cross-border patterns without ever moving 'personally identifiable information' (PII) out of its country of origin. It must support a unified global 'risk score' while keeping the underlying raw data physically isolated.
Key concepts
data-residencyencryption-at-restcompliancepolicy-engines
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